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 0x8db241e417ba59bcf7e64f03aa80196304bae688ea68f2942ec273fc1d883954. 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/00fe4819-252e-4857-ae6f-74010046834d.json and https://artists.proofprofile.net/proofs/artist/00fe4819-252e-4857-ae6f-74010046834d.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 0x2a68ac7ad69ffd075ac98847a3b2f221ddcb8a344e3aac11d1292751786d595a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ESA061204906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b05120207bc73ebcaae16036e92bae30d4175f7409510a8b5e72970f04c7b25. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ES80G1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29eda4f5ca03ce4315d483163f2f9e253bee0eb2c8d955892fa1c27697a9de. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ES80G1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27609f1f3723ce55f61b9dae5b406c75a93283f545340c42e9387571cd068d50. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES80G1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc524cf7d3408168adc1171f58439539f4274d81a927f546ff5eba21f511172e6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES80G1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881290b4bdb489fdff42495edd9936800c87d8ccff7b0c7dc43151f2f10c9bb7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/ES80G1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7564fcf447a435bce332ee2c657e147b19298b2d34f8114327e2cb70b014d70. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES80G1700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55760c9eb6dac57e47f1338ec25632db5aa5f01b16b2dbd996c3cb67d67f45. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES80G1700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcadf9e547222f19762c16dbad886ff08c34d960bc22998d9b34338c67e2b6a2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES80G1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce444e81d2d07abb98cbe179ddaadd47fe7e9717e0b8545af21a7435528577. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES80G1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb88992c508d69a1b303fb3e4b84cd67f4495d6008844e546ef676eb9317b05. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ES71G2109484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf5516ffe7966710a51652ee079e3f3dbaf2b8bdabc46283390fd1aea43c74. 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/ES71G2209000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e857944fbe0c72c28859f595c5936bad91259bbfa05d6fe5d087b5f68f959. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G2144842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb408c7e7089808bb973fafd70b1c0c0519ccefd2ee3ff6ae6e646b30f4cb25. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES71G2209003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d2c21a1b962c94a102aada0d9ab5ee6cc9bcaf4e9c1451f8439e84d79e8ca1. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ES71G2234600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b207c246202c3a0ac736b14417b7243225fefca397d0b07f7985b17a69802. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES71G2239852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd238c2db21d2079dcc4d4528b7e1bc855ad871e308d02d4581e5d45e3be9c5a6. 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/ES71G2335108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29baec20690ad05bf6d674f04aa679265c0610865330d5fb7a27de43d75351e4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/ES71G2335122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02a850aec5165bf324712d9c5844ed1a1edcb7d37b2f5ea7eee4a422065cc6. 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/ES71G2335113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56881961fe1913f008f482fd91f42416046b6dcbbeb8527e1487e581bb156bc1. 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/ES71G2335123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6676c073538cfe85c642139f6ad2f732bd51d0def9a490643e5e2fc123633. 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/ES71G2335112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf85039e3a7959ace72b8cea2f2f49d0cca5437def5cbd1f1f81f0ecffe08c62. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/ES71G2335116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08800c985c516d026c2af05ea95eb95cfe22a65ffcc60044abea7df5c67d3bcd. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ES71G2335115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f85cdfaa50a1770d7098e3cced94174a7be6cf33381dd7627ea2d0f8f6775. 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/ES71G2335118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5909596d5625832935d28103922c8a8f44f93427da079e012434805bb961486. 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/ES71G2335119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1f6dc4dae7a4bfd10f74fe32194f0031c049f5506eb56e0367262a11cceec4. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/ES71G2335117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a88dcb218580c397afe70ae678b390d3fd7d8e4efa8996bce99ab830a6384e8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/ES71G2335114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f6b2f44b09f49de48f5859e02caa74d1c6b826352b6a4cad0a7e3a8447010. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES71G2335120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06671c4a00c2cea40f82c72215b85216389911d3498e70392a45bdffa3e09d31. 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/ES5152400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb822204fae7c566f03d9c1934ceec890448ab9d65054d96daa777890b97a737d. 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/ES5152400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d476698ba5ff24256b24ed5f024013d1b1148008e77563ec7b716194fea47. 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/ES5152401333.