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 0xe62607ae9b79cdaa03e148d2ea32badb645c8843d151d5864ed1aea1a11f79f7. 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/f39bb5ad-cfc8-461b-9d99-838118f35dae.json and https://artists.proofprofile.net/proofs/artist/f39bb5ad-cfc8-461b-9d99-838118f35dae.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 0xa880322456ed15d95cb7b8d8d340d2071fe9814e56e380276213c5ecf900edc1. 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/QZNWR2366093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dedca9943c469e22d71f5067f55616f676a0d5992386d35123b3cb8bf68030. 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/QZNWX2316332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc08f2a1146efccdc45932eb0d3cdd563d8fb23b7968137e4a67e6841b16ff. 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/QZTAS2338465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b86be7d31790acf96377e41bb080c75d96fa6bfbf94f193351a395b39c39a1. 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/QZTAY2350526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67efa3c10fa435b131e79078e79b41fbcbcc912640bd4dbd6f768ddfa61c4b2c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB72386440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba98a175250f1e0fd5e612d879bba072def0ab94ce3186934f45f2ac0254bda. 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/QZWFF2397278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da15ce309f82d86126adc711265132fce5444284885853b0d21c1c38f08e3f9. 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/QZR8F2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22f5cebfbeb483770295d695e89b5f5c8ed8d3b4fb4036959aa8de78c32f983. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA52495618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf0ad82bc509cdd7f39721103e0e8e3ed461b51e76fc23cbc56126a394738e2. 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/QZHN72447101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b71fcb6c2523c07d969dedfd52ee5e8d8720e7b9ea4f52362853e1b4d4f68c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZR8F2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ddffb1a72375c30f0ebae48537afe998e7a110b5cb41f9f000d2788dbfdef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFU2491168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d08fec7b0151b27fbd794ee0376bb788a54067d8518347011db75687695b6. 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/QZK6H2440569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed234908c99afba0594efd13ef64eb82a991dab78667f4e9cd6c64d30ddf06dc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMEQ2454014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa015146ce3c3bfd7372524537ef04ead4743cac2b87906da5e2d735dd538746. 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/QZR8F2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e560492d9ad2922862c2f6e9663c330da9f5fc52bcb0675fd2a0eef1e2047e7. 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/QZWFH2495656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566a5f19a6619490fbd1682d28e869cc24c0ccfadee19589d8ee839b96fb7db. 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/QZWFH2436676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf65b626bff1a9d67ea73e05dda7ca9bc74c8da26cedc18fecd39eff1d645011. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFH2436677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb918b7ccabbd474925d07669393717475cadae2dce1a3e725830241917714832. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZR8F2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f45d39e11f73f581133d08c1501fbaac8cdbe761eb46ae0e4c9cc7d73443d23. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZDA42509081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d90f92d1e1c60988be945a7791f6a3e733a52c9ff709c27d527d09dbc84d79. 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/QZDA42509082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67efa3c10fa435b131e79078e79b41fbcbcc912640bd4dbd6f768ddfa61c4b2c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB72386440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22f5cebfbeb483770295d695e89b5f5c8ed8d3b4fb4036959aa8de78c32f983. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZDA52495618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42699b716437fc79fa67181aff83f4d9b43407bf6e49a60e0e213c6d813955ef. 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/QZNWX2316702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dedca9943c469e22d71f5067f55616f676a0d5992386d35123b3cb8bf68030. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWX2316332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a580cf2fa099424fa7eb470dda47508b8bdba5b16d570e9709d766b4c8b341. 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/QZDA42509083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e7a6b719eef7527f98f30970b85ed84c16b7e2d74c0d32bacfb70d764d5dd. 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/QZDA42509084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a05d312d921f53861028198da6a3310b9ee949d9de7855bc0ced3bffed0a358. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA42509085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377e32fa8e699ac7ab7b2fb1265a7cbf129146713f36b68c20eddf0ad3c5798. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA42509086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf0ad82bc509cdd7f39721103e0e8e3ed461b51e76fc23cbc56126a394738e2. 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/QZHN72447101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed234908c99afba0594efd13ef64eb82a991dab78667f4e9cd6c64d30ddf06dc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEQ2454014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566a5f19a6619490fbd1682d28e869cc24c0ccfadee19589d8ee839b96fb7db. 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/QZWFH2436676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf65b626bff1a9d67ea73e05dda7ca9bc74c8da26cedc18fecd39eff1d645011. 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/QZWFH2436677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa16698c48db959620a0eb78b8013172931acaff872890d78ed701975c6ff7d3. 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/US3DF2536272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea4139e172f3f3a389020839fcf06e0244038a64ce14eab95d8f2c1cb0d080. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US3DF2553294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca2939b68867f4998499062eb58baf3b71132af471ef4fddbcbcee3cfe65482. 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/US3DF2571827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9021a241fe1820827c07f0b431d56fd85ddc7c7a9e909cc3d6691587a224d8. 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/QZN882520499.