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 0x1ebddb40267770cf555472ae9b58901c4d05ca400df41055246e1611f10ac0ab. 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/7b936689-e254-4ac6-a8e0-b831b048a0bf.json and https://artists.proofprofile.net/proofs/artist/7b936689-e254-4ac6-a8e0-b831b048a0bf.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 0xed3a7d3e1d280b550260c79efa11280be8aee5e969f15978577b3e728f191e0c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN62251015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed07744bc5d0b6646d3ead56fa2019357524f15d8fff573207f98c700e57238b. 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/QZFZ72375594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885251cb5ecb3a5da6d2cdfa6c25478b60d18bca11cdb51a18d716d6f2cd5d7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN42329446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94faea78f24aaf20aaf2995fda722f4dc3141c66097cb90c6f1b1ce11e9a58b. 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/GX8LD2391746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e210db47a7b22ebfdca7ecb36ff6f5eda6112933dad25c172fd8a12096b8ca4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6P42376828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558620b5b7c1d736be585d494044c33dfff05cc23a2048ec0d82ff4ecf9d7135. 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/QZMEP2305802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bc99262ea393ecdd5a7da4fb1b07dde73ca05bdb19ee1419eeedfbf97b3544. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMBZ92369278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cf5122e1cdb99223b67b4425efb1c417ecc5102c28c2dcf67602d687b7737f. 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/QMDA62388689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039ee1d5dedb708acb7613a4916ad86a7eaeb92e406ea85098f8badba86bb7a7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTB22372292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef470ae4384491458916b207ee0dffceb377ca8edfcfbda744250712c8d05f8b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:32Z), 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/QMFMF2316608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a94c2911b4f48a27289f1439d34e877e8f5322a40c9bccca280c95a9e9924. 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/QMFMG2329858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f906df95c42be9f50a6893c1a481c2c439f42ab3a1bf69ca839baf421cb6d86. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TW2413911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912ce332cc8eea3ef910b37fe06fae41ef26a654edcc7420d16c0bff42393dfe. 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/QZFZ72475481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e1ecfdc2c936cc1e935d67285d1b2dcd7d367a4695e333b2e5ce48a8a952fb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US3DF2431548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31d39c43645b4e8ff871b3db5f56d6b128ac8a2e649ca60cbc1d11a988de3f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:55Z), 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/QM7282455425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7583931143bfb6f6d7010881dc9323d9c277d1bfe3ffb24475362018f3aad287. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:43:45Z), 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/USANG2438750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0facf6b85dcaede096b5ac53905a3fd319c857b45ffa91141a02e8bed073819. 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/USANG2438751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144041edd249943930874625c732048a6c17a02ab22bf5a1985e5de4e41201ba. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMFMF2436952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d05d280529addfd2c66012ae753a90b5c00702ce98bde112586a43604b09194. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QMFMF2436953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76670dd5539214760aa9c7b4847f5b9722676e0e5a306fe58d31d66ba36840b1. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QMFMF2436954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3789000db2f37dcd60d53eec2310b1122d5923bb2067b2c07454ed4c9f7d57. 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/QM4TW2515989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe317a5f370abb15d089447fd27aea4c8112e101853bf636c999c103e72948113. 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/QM4TX2568031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2aa36a9ab92b320910f3235e194e20af45bf7571192218e3108eeffc584c3d. 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/QM4TX2568032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1e35d9fcf8dcae0ce27141bb5eb3511c3d9b3e8b21c79a46b5b4ab14459656. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QM4TX2568033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6edc61f1b39f4ba60e4d9cd3b18084a807988a353f3a471a11dbf5c4af63d4b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM6N22553900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32286ab53fb6b40eadc20aa6d23d248ce62f1db74779a428b3de2f954f6fc4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QM6N22553901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05d8f19ab6dece6f2d9716a8601370ad75f00f2856ccec14f791d2b85f43b2e. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QM6P42555867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e134b8550a70801b050d308f51aec0dc17aa5dbb2163d7e4893041e0de362. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QM6P42555868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b1c743ac444e4fc4629007f4b5ede8277e7aee2d13ed39b9e49a210e7b9d5f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42555869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594e87e744d07f09081011f457b44f560c204046c3fe47c75e94c7ec3362a9d. 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/QM6P42555870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54f797caa183b045c46f591d01c24e303a401e4b8afbfd49cf36afdda576f1. 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/SGW502509289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb78d64e8d89c0dc760f510a1753d8750a1166d746f84bb1e4a3038c29dbd07f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM7282558010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228665c809a49d26c6a1091409461701683537e28619d0ab1bcbb7cb8e3d2727. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QMDA62565357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665872044c0d618eac9fa3924df1aab766c19d737d743f2411f3a23c2d630a5. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QMDA62565358.