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 0xf66e6b27114f1e3bd3bff202c41cd50ee3f790a2c647b0da8bd8809393afa95d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5201046e-f883-4916-834b-dd811656af63.json and https://artists.proofprofile.net/proofs/artist/5201046e-f883-4916-834b-dd811656af63.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 0xc3d3cb4ddf9d35113ec6274b693d9274e13573db6050a6b85d22661c2c9d64e0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:19:47Z), 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/QMFME2181790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3309fffb9f576a70e3cbb8ae05204931ff7c3ad1716c2f25bb79e83857174. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF331300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235c610b95a4fe4a1805bb4dcff26c65d2a9e385f961d4fd8c9a95dabaa5e18. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MXF331300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f46b14a076d447e3af4100dd269426089d1e3a839cb690e7ee94207d9453891. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:01:45Z), 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/MXF331300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3309fffb9f576a70e3cbb8ae05204931ff7c3ad1716c2f25bb79e83857174. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF331300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235c610b95a4fe4a1805bb4dcff26c65d2a9e385f961d4fd8c9a95dabaa5e18. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXF331300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8817230f6004373ae7e030797e27a3b101bcbf765fe540300ed48ba802d6b8c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2181776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b389960700e3a6b36e982c8b4e4ef2c5cf1492f830252e2b4e116b8320a8d46. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QMFME2181794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c8d1818cc6c48aa70d131c347abc97d04863c0619aece3f39242f424da7d4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMFME2181802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd75d70d49acd48147c948640968fe1191b5a9453e5ced869e72235b8c8aa70. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/MXF331300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70065e91ff1c4afaca39b834992747322c81a9a9afd0f096ab0e8e97740e7fee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MXF331300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb426aedb581d397160e32b1aac56742c8dcd1f29c81a7a3242f60191a9afa10. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MXF331300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b9d93fce1c2362260e9968f95f2706b5880b58f13cea1ed7241a883cb85a41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MXF331300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd75d70d49acd48147c948640968fe1191b5a9453e5ced869e72235b8c8aa70. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/MXF331300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93064494509376244cadc6c241c9f5369327e087f64129dbc2994f67ca9e9ca. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MXF331300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa5c37418395ef664e2f51992af7fda2785dfc1e18eff4b387fbea857971e91. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MXF331300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76db27b6308cbecad3733802728e7806f2f3c8e00b48aa5abe5333acf9d36017. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX991588821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0150cd210db5957b840d3ddc4a483fb03c9467336cf12b9611cf359c814ed4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX991588822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841acf0a6a7844447d062763040004e519bd4fa7ddeb725c20157584d1c5b0d9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX991588824.
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