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 0x4f5f6edca3aec754f40ed20476398af5b4673e518d20f4be69102fe658412aac. 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/4748faf5-cc52-4f20-9b76-c8439ccfc492.json and https://artists.proofprofile.net/proofs/artist/4748faf5-cc52-4f20-9b76-c8439ccfc492.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 0xfc479988e28a1ce72385cea26cc6d822092c8679b781caf3f85cfad79c0549bc. 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/TRADO1300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173339006bfec5a41286bc36fc5509a99cf1b97a95bfc8741bb7de48ffa8673. 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/TRADO1300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f07cdacc4a9897a15753456bfd6c4e6f68fe57245a279680764aeb00fa679e. 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/TR0041101026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc7086ee3b34dc9a798884cf85446b11b6820071c1a1064d09df164a432528f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR0041101027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472d107e5874e18652971b925ee6242c1fe448354dc35ec1dd86b9522d64b472. 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/TR0041101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4845065d2814557714c16fda74898cb54120e34a644983cf3e1da6ac2f4622f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0041101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1b73ecabc191417558a937290f995452dd7a0c0edb5681d7c38289de85672c. 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/TR0041101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc81bca62807913a1a61c09100f5b235744cc305f558630ad3ca50a9bfc07fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR0041101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0418e8ad224290f984d819d040241c3dccbe023470d5194d83f8803ed566f04e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR0041101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69615876871bd2c1837d52e7a93a15fd49305cff694f7141a868dffe411e9e19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR0041101033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458071f1ea772ab0afd6c5e29cee56eb7d199bad4114b77080f5b2e03c336ab. 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/TR0041101034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e3fbfde0a6d826f2a33e6a55f97228a46756d9a9af09af572387c124fca9a. 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/TR0041101035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eebf155fc8d0c6cd4b354a12429004b0ad7a3b545af3f2b001c9521961eb3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0041101025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6436ac75f6895137bb5191c327fb7c7deb67300f74f0cf426f3de480ecde5ab3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0041101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04081b1cc990580d015daef07b52628462293eac6c0ef76ec0fc7e51676bc883. 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/TR0041101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95acaf4d6487a224d580e5c58f4d39fc02427f7e665b2069edeb1bbc23b0fc. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:18Z), 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/TR0041101036.
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