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 0xf8736c75ea635fad16fcaa5033cde5a1658fcc9bd6cbe5840cf1ca13c1ca460e. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/338fc0aa-ee83-4d47-a0e7-d39b53778cf5.json and https://artists.proofprofile.net/proofs/artist/338fc0aa-ee83-4d47-a0e7-d39b53778cf5.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 0xd2c069058ec2418a4cef8c0e51840abaea022eabef1c9909991463efd52fed9a. 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/USJ3V2393611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631ecfc55ea146b879248f58df44183c5f83a605f0a689600e6af442f51ddcb. 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/USJ3V2393613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f669a0362ae945d9ddcf9ae3bd6bcc53812c6a396c11653b5a92b2ae6a17173. 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/USJ3V2393615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177f1d8f7e8fe0a48a51aeeedf1a94f32e7451321ba4683a9d2ed1d001292668. 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/USJ3V2393616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19103179f52b73b1f1b7d26f1c233f79d0b6eaeb0850a3418cecf07c340660f. 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/USJ3V2393617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e23bafe3f2945e96a4cb19d824438596e3cf3670add842c7cefc0b9190d36. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USJ3V2393609.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a73c051a1d028264f71de9ee2e46a24441453cd73adff8e5920f2519a5860a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USJ3V2393610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6628130b1eb8e36030d306dd6fde3821ef2a78b3a4f0b7895d0402c8e62a647. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USJ3V2393612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231fa7a8eb83752290cd27342f6d6be6199faf424b70fc053bd57c379ff255b7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USJ3V2393614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7b6768f5afe0a6260cf1f79642a2416654a93d05ab8a66d0abedb81d47989. 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/QZNWP2250004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5eb0ce3d26defdc7ea17c5d6ea8eb1e4d65cab303145db137912203bdbed44. 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/USJ3V2053178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aec93edbf452b85f46d9e0f030c6612a98f27971ec9fb7db4d8a58c66465a0a. 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/USJ3V2053179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda24fd24cf9b77c9523afb2288fc2c9479a8745fd35347600126efad4262c623. 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/USJ3V2053181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a3bdb036c5cc5807e486af95512c8cc78e0f0c8fc4786d1975a26dcd92347b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USJ3V2053177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304967d33f4526256921bfd1ef1e94189db76765bbaf868066b6e5141f5d0aa8. 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/USL4R2005064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75823feb755108b1717b263028ec41931eb44c95369648b978f06dabf397f5d. 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/USL4R2005066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7087401fc5da839ec6d6f74d3e33b73acb96edaa598170c70064a09e22ffc2. 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/USL4R2005067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ca1b8f9b3fe133ef41c1d45ef0003b2e8614f5c001bbbc869a9d78179b996. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USL4R2005065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363a6aab6805b358b499758d6f4e1c21810ba02d948641acc5ede26f8d7c1c84. 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/GBSMU3244933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee339000dae082d8df9e3e5ac56c72a8815aa685fc49414979067dfcf272bad. 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/GBSMU3244934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab65400c9453d0b6ad3e65943f86e9ecd82f2176062382037dd13c28aa367116. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBSMU3244937.