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 0xc9fddbade22ab98391dd6099e11cf7f695ded41511bd7a34fe9d61d7650efd49. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b57b3bf5-fb83-40c7-b644-4762740255c7.json and https://artists.proofprofile.net/proofs/artist/b57b3bf5-fb83-40c7-b644-4762740255c7.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 0x5cb81ea7a243f5101e63d97ca2e20c11cdb5cfd46eede3dadb5daf3a3938ae84. 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/ARBLA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa917d5c08eef6a39354eb069f1e02ddc17f5025f07aac760105326498635380a. 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/ARIXB2311161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8376935ca00e19dbbdf480316d66447963ac492dacd10eded5256a559e50ea. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARIXB2311162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2664e5a4f3e0aa43d50369b029b90cb87066a28179bd81e4c1dcca177d3dcf. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ARIXB2311163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc7706ae8eaf44667adcae55477e36c1ab6cf79e540bff434ae6617c12ea13. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARIXB2311164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1718b47871b427b3959713db058ba7edb6181691bbbaeda3ec9e79ebb17aeeef. 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/ARIXB2311165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74a2c4699298ea7e36c70131c5821311fcaf4f2cc5f4504047630a29b8d7d4d. 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/ARIXB2311166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f03a2400dfc2314b3836f59fc58e6f21be6d38e1ea18babf84e1a2d950ba1b. 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/ARIXB2311167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf135674e8e31761b7c3fc3d38f4549e411ae44db2e89e3a394594d3eb3f8b6c5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ARIXB2311168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99f1d7b0be769f2aaeea606982d0a46dcf544cfd0b16147cd3b4451d6fb674. 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/ARIXB2311169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0430ed56f64a5030a20f2d7a8e90743a5865710ba5700027a6ba8749328d332. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ARIXB2311170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1e31af6f821a682c9430bbdd3bc947523157ae38fc1da2c569ac761f1c1c19. 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/ARIXB2311171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa917d5c08eef6a39354eb069f1e02ddc17f5025f07aac760105326498635380a. 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/ARIXB2311161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8376935ca00e19dbbdf480316d66447963ac492dacd10eded5256a559e50ea. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARIXB2311162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2664e5a4f3e0aa43d50369b029b90cb87066a28179bd81e4c1dcca177d3dcf. 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/ARIXB2311163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc7706ae8eaf44667adcae55477e36c1ab6cf79e540bff434ae6617c12ea13. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ARIXB2311164.