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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15477f428af4815b4854ba3e68dcca53f6f2a2f1c9c7cb71a23782fe3873bf43. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c15e75a-01d6-4000-9869-a72025bfeafb.json and https://artists.proofprofile.net/proofs/artist/9c15e75a-01d6-4000-9869-a72025bfeafb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31cfc73610c024ed08f9e1cfd80e334468931ba0fb49653ae753043809eb3a7. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:27:44Z), 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/FRIDO2312853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548c21b21d4372a878002c7198b9228c2ef4f948a6116f66536fdfb287c7b27a. 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/DEQ022372706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96accea1afcedcca7c2148ba8a9ca153accd782b7fbde145c9079dfd01e05f25. 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/DEQ022383593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede583211299fc9e194ea434e990d1d288538e89cce93367848bb2c856ca31fd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:39Z), 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/QMANG2227239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a86d1a9534b439e88cf25afbde3011b9103d17128d526e1f1b39368b4cb4e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:17Z), 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/QMANG2228104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50159dd73bf5ed42a2194a51e3c7371b5acfbabb3216c777d74ad22d171c8379. 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/QZDA52473805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8290142b842fcda27302a812e72f099a3021da3bff22d69db87ad4466e218104. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:21Z), 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/QZES72430531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba9bc037055d8cbf1f5c9f9536059acb74bf50ecc33cdca0bd15ac95de5a7f7. 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/US3DF2435576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2ab9568b2f2fcc3a806ca65114373c9350c40b031a42bec3313d5ab45d4973. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6P42440018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe6da70f2486142b741b43cdf42a51baf75aa3fffb25bca422b4887a5cb08c. 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/DGA052490544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152b5669ea60422cffaaf635dcfa4a78636838f7e9dea66d4e8f2d78a2cb82b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QM7282453507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a544e4b9cd156551d47aa278f9ae3ae91166208993951143d6cf11d135c41b. 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/USANG2478092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be9a55651f22d3ad75001579ff7095414ce4470c6882a1e7af329c9da23c66. 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/QM3DF2401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef5a366b9895c89be5c92c987d8802ea2da1769b1864f8883c61238f139b77. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3432fb3c2c314bb6d52cddc1d1a23f8f8fb6387bfd66353e796e001b059c2c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRIDO2510379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547d4feec9aacbde84f5bed30e725231c935ac312fc15be4c28c8bba5ce5cea. 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/TCAIJ2401433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b73b5e6ee4ae9d219b131eb51c44c979ec1c2b238b292035fa6974012c2eef. 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/US3DF2476536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae72d9dffbf5b18d7fa62dace35c53fab26ccddd7cd9694df08aa56ca055ba0. 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/US3DF2401098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a2489b817ddbf5ab4c5086e5e7992ffbc67a92d0c385c0cda685d8e0af736. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHNC2386240.
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 0x9b8c938f31584912d81fec838cc39391f1da7a2b98c05f1ffbc9627ba890ef3e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTB72240302.