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 0x8dab53df47d6a95c1141ccdcca1f9ca096c2a13ec7702021fcb8b56958f0340f. 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/4557c733-7915-4657-b00c-be8c5570fc87.json and https://artists.proofprofile.net/proofs/artist/4557c733-7915-4657-b00c-be8c5570fc87.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 0xba78c1370118d81e84816efc8708aed09071a9ae97a32f9a87501b5ecf41df84. 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/QZTBA2478687.
Las Mujeres y Los Problemas (Original Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b12624bfa2e58bc8d4324b0ce7d1bf22e34735f3540948d19873eac85f204. 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/AEA0Q1978609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd006554c7fb865f2ea1bfd5bbc13cafc985512cf8ddb7ddfdc6c064561a272e2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/RUA1H2022814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24a12b4c0fa9963b6c5ecc9e32d9483223152ef07db7ca34f5a8fe3d720501d. 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/AEA0Q2120005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fa1f317d034ec0cb4983b7be0d82f2a47b0e8c0db6c387c5b6decde180f57f. 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/AEA0Q2120012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24a12b4c0fa9963b6c5ecc9e32d9483223152ef07db7ca34f5a8fe3d720501d. 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/AEA0Q2120005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c479b622f5c01f8b54c1e8bc820ab3743f4eb440648a5ea7b8fa02d9ef362. 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/AEA0Q2120006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3624d3121b54cc81e5fb252b8be427910014024338830ee8f46258b3ccd8e2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA0Q2120007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da76f6255309d9b9c2fdcc9b29d4a5f7968e139d0dfa46d8bd0b6c9ea7d4d8b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/AEA0Q2120008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cce4ea03e95547123cf15ef4e1656c8c16687e597c4a64a3793864f1c27078. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/AEA0Q2120009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559837b7757ada05c879d90eec3957c6d627121c8ba8ab7ecbc58fd9cd213c7. 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/AEA0Q2120011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fa1f317d034ec0cb4983b7be0d82f2a47b0e8c0db6c387c5b6decde180f57f. 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/AEA0Q2120012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834389375190adbe2a27c6b14b3703c2d90b52786ab4ce57fdbb327ea649c82. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZK6L2188151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834389375190adbe2a27c6b14b3703c2d90b52786ab4ce57fdbb327ea649c82. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6L2188151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db748ceb5b12c34c606b9eac92b99601cf77ea8815125139338af890801d93. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6L2188154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747e9662de9d8bbaaa399966f35347fb88fd8b03def9b83f23dff40b952e358. 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/QZK6L2188157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a98a42ff474ea27c54b139423b67118e90c2dcd3171de00c04569b44bf4bd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZES52238419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aadf20ad4d1789440e04c6219724955426f589b45b729b9b58bcb99677e79e. 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/QZTAX2495873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9044e57bfb3a4d026f26c5665f533cbf313811f42fc35ada33a531e53c5ed9f1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QT3EZ2418183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305132fc0a4724baf891a33c3bd99da0ac1099188157ffbdee1230069d9bc958. 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/QT3EZ2418184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331f9a7912ab956a61929a13c70d96ff71c4e7697d27cff201981a578428da03. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QT3EZ2418185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eba1ebc568101b788cfc1d53d87a9fb746f758fc169eaa4cd942aaa265a46a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3EZ2418186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b884396102b10d1dda5fe24f3439f0cdbbc4c481772270ec439f9d22a324b73. 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/QT3EZ2418187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa544abdece436e6b5cdf066bc4f3b6f1e8f06f4fc44d50a54af162e400150a87. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QT3EZ2418188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484614f2161ab15177121814ef90e27983fe0549ac71f208e015855a6e6c0ef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QT3EZ2418191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27f92df76ddb839c99c4ac2328ebec1093b7b7a0da0b8e664705d8aeb6a0cd0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QT3EZ2418192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd894687d8076f0f4a6919506e634d5e778b6bab728e9021a252459f7fcf790. 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/QZTBF2591105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e51cd1a405d236cda493c54e1a00a703ce995a67dffbd125087b27ad46cdb39. 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/SE6HN2165990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973af2ebd852551d9a6da4a48cf9a38f27a399bec86330adb635382975966ece. 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/TCAGB2294264.