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 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 0x0792a26a80f4a100aa76d81f37a3f23770fdda03d23642c6123fc90a437082b1. 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/9eeabd48-e431-4795-93af-ce958d6feb62.json and https://artists.proofprofile.net/proofs/artist/9eeabd48-e431-4795-93af-ce958d6feb62.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 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 0xf744e56cf7dd08c9f5625df464edda9e82bc2551b100c1eb0c59ab5ef7267f38. 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/USLD91734651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e2c207494410210e1f2615b59a41ab430256ce3ece5d96e3be8397802bb761. 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/USLZJ2122258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf12e1622285d2efd05d1e8ac6f5fd0d925f3b253d53e33fa8d9f72b00421be4. 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/USLD91734361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45705bf26153cf2e84e0d8aac899781eb83ba65906860e78901fb0ce3826a7. 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/USLD91734652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ef259888bd54c131b9c90ecbca88095503f00e34ee8029df82e9b9fffa2302. 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/USLD91734653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf12e1622285d2efd05d1e8ac6f5fd0d925f3b253d53e33fa8d9f72b00421be4. 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/USLD91734361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e2c207494410210e1f2615b59a41ab430256ce3ece5d96e3be8397802bb761. 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/USLZJ2122258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042c0cecfbef3e91182965fad7fc1218c4abecca2bc451f29676f3c0360d16c. 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/USCGJ2234273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742877d01f6035e122e9e021d07c4e8ab1681f0b2e189a253ab2bd3cecc42bee. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGH2278686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb63736d8816fbf84e9979f4d2f2d0f93aabd3d62dd35aa608e29bccc75d95a. 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/USCGJ2234275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270ccb287e6b04fb4efaa5dcbd5e41921405ffdda020b946606d4ee87f874b0. 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/USCGJ2234276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2067dab7af6523f96acc5edaa988639ff35d3bbb631839369b7e323e12dfcef. 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/USLD91726731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97286033c5a7bc0d79d6467b30a50b9695ef475122d031e04430e6557706c73. 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/QZL382283732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908de59898f8ad4f6c489e36931d9c4c5143043a9cabf07e9b0a09154500b74. 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/QZMEV2100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157728e8b471765987293293e82abf4bee87e9bc86b1e26a34779d5c9a23bb3. 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/QZNMY2105628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3405f2b7a02896cb7ccab653996bdc506a51782a085cf813c3a2520f58b041f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZL382283733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5546d32c2f8eae15b22028864acd85ac7e41f27283a500c68669bd89907be7df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZL382283734.