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 0xbe9ca731ee43f1c103ae2e8c689dc60cfb9e0676c2ca041772b9ac56504172dc. 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/7ae8e3ee-4056-4104-a07b-f66d37630625.json and https://artists.proofprofile.net/proofs/artist/7ae8e3ee-4056-4104-a07b-f66d37630625.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 0x080a4f54bd956f1616772998442d3050a15730e89da1a0f56741c0dc4e5a3de7. 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/QM4TX2408507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9e1f4f268e3b39d6e3c5ebd38807adb4301a08f93cd0a2f40a22e56d06550e. 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/QMFMG2343405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e895a261a13e1d2f7e5b71d21c647df266c5fcf646f7cddc3eb29a2c2ae5a. 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/QMFME2305964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d6d3ec5ddcb8f02c767d89b497f9c21ce1df0a12df29a0fc30f33e9ccd6c20. 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/QMBZ92328171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96273e0c332fed0c11bc7eb0220995312337e045383ebbf72978e157ce6ba44d. 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/QMDA62278531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676b4085ba399fe7abc141fe529a24413f370b7064c95cff12ab4b8ea199a633. 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/QMFME2276137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23a7e37bc782415a250bcd2e5632e58293d1ac965e00b178bdb6b1dbc9dfb4. 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/QM4TX2311121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5d058bc597193ec196ca93d3e795182d2ea52d6d78e9e59d9c7c89cc87c87. 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/QMDA62200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615e2f2004dc42157b15d3b4ef0a8c4c3f4c722a27265670143ed5f48a9e013. 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/QM4TW2335147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7fc92bb8f84fb59af2ba0e01e2a82e9825466309a7031b1960d7ef770adc80. 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/QM4TX2311139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7635a1fa911d8d3d0020ca59911638db9230a133fddbee50590cee2ab93d6cdc. 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/QM4TX2218911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff6352333b9d3b48ccd61e01ae3a722c97c2f011c19b365643e46249859fdaf. 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/QM4TX2218792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b14a130e8bc565e6d35717c0ac5d5c37c7283e0207ed8c8f224ecd2088fac5. 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/QM4TX2218822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0691f603c22d20cea3c61cafe39179522843cbb8cf355edbd7fe48759679cc. 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/QM4TW2217176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f8434a331e3ff31cdac65bc9f16facbf1cc48a9e7c5361862b369be6b4151. 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/QM4TX2218836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a7ec70b7355958c066e465ed4ad438865a2b38293bb6afac7332ad03214bc8. 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/QMDA62169171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2f0afc7182fa10ac95c4ec5bb87456f724f647cae4eb73864498ad20e686de. 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/QM4TX2218913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeff6872c0a7880789594d76e227e89a416cf0bb8ef6a03932c60b420aaa46a. 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/QMFME2169915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986375c5d5ced436f46bce11886243d399464d940fb78be049975f04a4c3cc55. 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/QM6P42100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58751cf9796da9db79bd0ef67c55ab76d50a1b7b995c562df12a8a7dec5f010e. 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/QZHN71955035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f998ca32e93201c98510e93285a1f0421f0c1cb7f842cd38ed33343f64dbe. 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/QM6P42100626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2094cdb76251b33d0ffe94dc1a9572df6bbcbc09acaedfc77d1601bc7ba1d. 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/QZFZ21973564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33739c8cec29d17bc2316522e0418d930ed9eeae71548a8b08c4daf9ba588601. 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/QMBZ92115041.