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 0xb61f271392c2d253e1c638e49c1426217f40180fdda999e2226d3f9e62a8b501. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62b8b619-e14e-42e2-bb28-48eb6baf4827.json and https://artists.proofprofile.net/proofs/artist/62b8b619-e14e-42e2-bb28-48eb6baf4827.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 0x622d26fa5bfefdc70941b89aa4d507f456f56757b76986efe82af435e8a72b5c. 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/DEYW82104116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef21cc815deecf1bb8b38211554a9979779fb57d78262c7fa4af32f1f4a25738. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:07Z), 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/DEYW82204748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684573955e8afb7f51d2c8aacf6b14736f161204d88a936f4a5cd0da95f2dab. 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/DEYW82302755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8671fdd78bacbbd784eafb2daf39d1b1a465d01e6e422217083e7413d2a7f881. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:01Z), 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/DEYW82306479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4960d299be95866488c3619d7cf1f9049233917bef7de6620a3be207cf4f1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2454326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb7625425e95ba5034ad05fd1a150e919677efa16a6d5e6986dbfacb00982c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:12Z), 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/QM4TX2419684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941bde4d5671183ae48c78a6895b1f9ba96840e76b8b1686b4e42d683e493d25. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM6MZ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea378a5097cdf5e51f2f73cff3445c7fef27de6905440fdaa90604fafbe5833. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM6MZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c483486b0353fa78406ce37fc9b31f30c6edd61c2adc522101674b0adc50a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMBZ92439467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3344749331a96c2cb2c653ea21c406da0ef152fc2c4826bfc7afbe197a16c22c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMBZ92467843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9f9c0447f547006967b38770076e610a0a4e99e4a97efb4631630a8f6a3f51. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:51Z), 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/QMDA72449183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c9021adff403035124d6441e12cf8957c8883bda02e2e7be49593fcb3c94f0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFME2516101.