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 0xe55c7668b517266e2822e910850552a44ef88a058b1ec2e2e135a8a4903dfbf9. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a319cf1c-f1d2-4088-9f9a-71018a771802.json and https://artists.proofprofile.net/proofs/artist/a319cf1c-f1d2-4088-9f9a-71018a771802.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 0x716e32ca35ea7caac45359462eea34bed82ed4769d567a2f452734dbb4f4e761. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/MXF331111234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411abd2844f12de129b3734dbf2a02ce0097cb05e1e4cdbc9178a4a46f3944d7. 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/MXF331111235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4166750fc6874d2f968eca37d768de149611f9bd88d634d55dc8bf99f2b8e9ef. 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/MXF331111238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04858ff2aa7f52582147ed0ea60aeb7a1891a03cae556d0557e74e2b1da6ddea. 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/MXF331111241.
24 Exitos - 10 Grandes Artistas Paris - Italia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9595c5aa8d903e30bc1324ce1110236d0eaadb96eeeec75313087d98a6811430. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MXF330911197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba7c6bc9bcfdfb441ea29fc6c21b3254544e54e0cb993f2729a99c96dbe94b0. 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/MXF330911199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0608a60210a1e1866b90d8a559ec13c8b22e94e17fc041ce5aca5fda3970fc32. 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/MXF330911204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931578735a54d01f3b0a2a7bd81ec2ce180d5f740faf2cf172601e06e00927a. 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/MXF330911207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a0496016b715aa3b0a002c04abc88b521fcfc555e27055cf8bdfc2da0a5f91. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MXF330911212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999d68e8bcf80f6a8a8742a4e767de78d4b9e7872ec7c25519b34ff1d9a4aea6. 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/MXF330911215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a855644ce398de0ed9bc618c3e91a82bfa4f42dd9d2b4eb95ab211d46178c6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/MXF330911216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01119ecce4ae483aeb812193c18c236c7c313a313d805c10f1db391fdd5049a3. 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/MXF330911217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec1c49c80f65a7eadb86bcd7176c25af790f61133f6a596e206b9e2d1160c9. 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/MXF330911220.