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 0x25fc9c487ea999357096c977c025ca4fd65f4a2c04cf8389772e53da1119e63b. 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/d97eb28b-ac39-439c-9a4e-065732961fa8.json and https://artists.proofprofile.net/proofs/artist/d97eb28b-ac39-439c-9a4e-065732961fa8.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 0x603eb61df78fd2b1612f914b2f52e049b4b0cdcfd3bcc942915ea4ef89819978. 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/QZDA81936910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f5229a2e013d348b6a0f90871dc37eb4e088ad699f931ea4d8194ae32e18e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFYW1913100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49cb739bd118d059429fc4f01bc59406973fedecbedc3aca511ec3c78ecc88b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PTUM71900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabbd463aa6387e467e7827ded623ecb6d49a5512f1a81eaa393daecf7fa90ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PTUM72000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b8fd014bf680220d5fbef81e95eaf0376626df89ea3764590df480dc19b06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PTUM72000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd520640a7cf7bd583e18a166fb31f7e9e04282e3bcfe147decacf332da9242c5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PTUM72000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02352da0c6b5fefa1c8eb815e4f16f8edaec3c532f76903513425f66f760f77b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/PTUM72000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bfa56bd4c491786ae83ded967d77cfef38ca46e29ad72326d28f17a6c7710d. 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/PTUM72100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2875c11434e1c0bb29eb6a92f6d6805998d726f8f4f62975b5e37853f3428ab3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PTUM72100538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc30521f566317457d91de9efb6e6d0fdd046c19cc573bcaf864207f3f25258. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PTUM72100539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7078910a9573bcef215e0f42a527270411bc9ef96da7e957b1fd5947a450d7a. 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/PTUM72100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efa4a1e96f71e2615cccd0a8a11ec0926f36c93b055038d446747dacfadb088. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PT2DY2100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdc20862b539244720dc676346df68459776674b73a30bb29488b004887b95c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PT2DY2100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf225763baf5149ade05b815f9b7cc2eb6826bbc39279f30c78670240cd13d0d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT2DY2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc6587adbf43c97e5263ff9400412c9d4084bba5561955c096e89e0c79acd56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PT2DY2200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e72330517348894446171ea3abf7d235ec60f196ac3174d61e20bd25c36a7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PT2DY2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79cc83f3d5c9a505bc56bbdacd47c4bb2c11542bab13f93f8db4cd022aac465. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT2DY2300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3650288d78d7dc342279e73bdbbf1602de53cc2b7bee6496165caf39bd842b5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/PT2DY2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf1d54b8a3b4f2607a8ba06aa53f312e7a394fa0cfdddaf3ab5b458499672fb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PT2DY2400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76a1934bc67219c8044f3948dc1a211fef7e284e846d4c0997b81834882fe7. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/PT2DY2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285b15ab5f6d6300b56ead3571bf4c1eef46e9e0a48f248403b47b3acdf7d1e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PT2DY2200454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b363078efdff7bf84f474c9748af8e56c85798ba118a106c1c1d5580411291. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PT7EX2100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76a1934bc67219c8044f3948dc1a211fef7e284e846d4c0997b81834882fe7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PT2DY2100019.