1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d419b4e88b87e1962d7aa6ac39c606baca0b0efe58491e2cb1c06aeedb9d1. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5d8d83d-6628-4026-ac95-ab97f2f9dbe1.json and https://artists.proofprofile.net/proofs/artist/c5d8d83d-6628-4026-ac95-ab97f2f9dbe1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62432d42ce2f265ab87445621efe1bcbb399386e78f6a8f54911719327ae962e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79244d8ff1e8e402ff4225599a22e7eb5325bd0190a230c78e324490bcafd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77cebe27a2a6b721bcc29a210458c3e53996e29890d8c431a523374d796acc0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:28:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1ebc602c45259d8d6e3102a9c279ea8000db605d69bb650dcf9c27b3f96159. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a7931e688e736561b4c8e883827085c46077dbc882877327f90878fe5736ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6d0b26c8150db09e0b1c92a7f03d4b9312ff5a288ba494b726982160542358. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbf9ee57063f989b87da1fa839aa0aeb2bed3eac3a37bd3761814691f9aefe0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eba742d32f86d58952afc4a14f1d4d6d4c9b8712c0de55b67e39c73047881c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6087e4682ff31b786ca510f195b60a4ac19ac961d1242686d4e74e11f8219c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac37a32404fdf5da7129a1b100c57182097d2ff97684759779ee880097d478d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419da4fb610893b74b59041edbe3d604970ed399956c2b8135ee8c4feb2b4f6a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4feb0c58322ff43975615c3f2ae461bcc46d747d81557d82a1b93c2f6af12a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ba75c6d3b644239778b6ad32f1c53b545877ae091ed11ad5b52b659d792f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda589fb6e597e37d80810c29f80c1bc358970bc7e19ff731fa66ffa59db07aa8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc0a1e0ee4f924ea172053248a5181fc5ca1c05eeb5fe1ce8ae08d9cb417c09. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ea0e9b8c8d01b74a9d644537006b68d800b15d618813949a6bada7737c1d0b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dec92e8121cd66616c0a3aa478b65c58c169427094d7d35d67e0da8c5eb0aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6150bae4f4611567041d92beeede772b73a6c88b11053eb744328e9fed7e133. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1632b99ed1f3ad47ac20f4e961823cb0b9524fb5f40805c1550c4700bf264b12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251473124321372269a70d8d25bf88e131d2fdb31cb41697b0412b139a82c77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1853bec885213c9feaff75fbdc72078ca9c455fbb440e57debac6341e32d223. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb6556e1e941155bc655311c84f11da3b4951a57d84651eb92a746bbc889ef5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b78f447a62ebd9f4ebdb7ad160178cfd1a58c12cdb8d9f259be45af603333. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:13:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTK352200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c38c6655b178f69a458e4800bc80050ca618c5a388b37a85bb3576ec2a64fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6935eb2f830ca2f64ba98b43802f5a9610e0a72357af77d37454d9b274a212c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef218d333294d098677f73b3da011ec2b62039b00b1032e5d6f6c725bbb5820. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa958149fbe3494a5b193fc283a7bffa060187ddb33ecad7c8e7ef03220e26382. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a835473c084c835410b1b9c4c623061efd6abb53055aef82e01ad1a16bf51. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c948964edfa0174cbeba2521396d5ef7e132aa206d827ac280d4d8387eb2b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfba6f325a8b500b5ea2c6651eaec352559903e8ac704fb7eb486c21089ca51. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dea4191abb513f898a35bbc0742db4d1786f25904aea2d0db83a9852f4d9f90. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbce85bd62910eba2efdf19dac69ac28dddf9bc0d7bc2253ce3284309acc7244. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef37011de493c6a64f4b65213ab3dd56aee80f038f98e8ea2cc887f8792699. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cef20cfdbe98ce38d433fd04c614f8308f7bf865a8a7bafd95123856a04857. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f14e450df183db1da492573bd25f657855eb03e5cc402fef6532b27c0ad3f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb4dff9515a52d044f7e10ab739eb405a5fb32e0b628e90fc3d8a10e15b17f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8972090f1efea3a8779216b9ca9ae150c53fdd9220db18b60043254dc7a6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb0a4e843f093413b090d3e0ed4dc7d2223d19ab76ddb48d77208a66b5a511. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe371d65146894f5acb0fb51c6623417c503ba91c91589fd716ea51acc21192b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409588bdb09149f9b6b9951f83e32ee403302a86248f1d97e2e991bc0add25ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6c6c13427553b0ee8ef5aa5cf2a71cc8949aedf2ecdc97962a1dfc85f9dd4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59de7f1756936d25721019b106b898fa525f24b4d9f6096351035b015edab013. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2066916.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch