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 0x0575045a2e8518ccbc4362c61a9586f24baaaea408a34c6f950d968741376ccc. 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/dec9db7b-8478-4c07-aa6f-f1821c3389ba.json and https://artists.proofprofile.net/proofs/artist/dec9db7b-8478-4c07-aa6f-f1821c3389ba.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 0xd788a12e0a28b2eefbbcf640eb4bc2ea8e1444ab381b1f88d9d854affb43f68e. 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/IL1011120530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7cbd777ebe8409fcb7789818a5269fdcbdcca9f9a496f66957724635b9a57b. 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/IL1011120396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fba8d5c81a029d64f99972281303d3ce2f98c0735d704b2dbd744ee81d338. 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/IL1011120593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf55e4d10a35b9967ac531bd3dc05f29d246c81514d4f3f6b6a730aec2cab9. 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/IL1011120594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0583b0324aed2e1647f08102721041d3fe9c5aba0526c8e6c4372cec0d2ec. 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/IL1011120595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e771c7b84227a188bef3c644cbbb43cee9577af8da33dd4c1cfb899444ebe8f. 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/IL1011120596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd0a06f7cee6c0e1d441a056963ce42e3499ea73bb2a19da20eb098b5b5bb99. 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/IL1011120350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c3bf3d6b4b80e6f29539f563674453490b10ba36456e3751954c945c6cb55f. 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/IL1011120598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd35b8f3b99a63c4a2ccea29b881c9f494b15c7962aff0ed8d2e41b8dfdbba7. 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/IL1011120599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7826fd212dbc7138ccf588fb79108e0c76c19569e1eec75394138cdc4430eecc. 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/IL1011120600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d8e97c53d834685f0af53c87265e0f03225927c298356e3a3503bcebd4ef73. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/IL1012000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33f56e815e8661bb29bef08205ed752db67f62f1eb109610d8f5973f2af4d4. 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/IL1012000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ec83619226b3534f12124b139573d61bd0a4e3b64d13deda21d05bdbb7c11. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/IL1012000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aedc78f2ec2acec148679f5205adb30b3d39908d956d18d9a5bcd660142c51. 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/IL1012000337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714ee78e1a5dffb3cd7a2f82d8e58f08b748a83134bc3e8b66157fd0866cb7f. 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/IL1012000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09e33a4aa612f1fa71b531282ad1b86527260b5c64c1c8f8ff9dd8e064bdbf. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/IL1012000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c66cdc54929bab115ef6f7d02b83344281e18eaf58310960e1a91aa412e85. 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/IL1012200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80313455c4b3be1742e283b84d7b1840f60dcdaccfc060ee74a5e01f0999cd34. 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/IL1012200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237513d6e92dc6b8ed5df6cdc342f585b40419a8692cca9329e27acbc14e2c1. 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/IL1012200719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582244ba10bdb253306a0ca9303597b0ea968f7ab45d44696e6cb8c66e26e2c4. 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/IL1012200720.