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 0xde223757911c5b5c47846d7726831b2dede736b24c9d88f2f2bd636d484dca9b. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59126519-17dd-44bb-9b4a-35ebdffe647c.json and https://artists.proofprofile.net/proofs/artist/59126519-17dd-44bb-9b4a-35ebdffe647c.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 0x0432cd0696853d21a9fea4f012e9fc1f85b0892473e239b0686b5e1fa81e9c94. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SGW502346634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c620cc7f5b249dbc94275d987a731146ed186b79ba5b6cc24f1663ff715913d. 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/GXD7G2474219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5fbf41b06c360925d68e8698c10532b24d2bbb909017ed0e1d1c9fea4902a9. 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/SGB502524225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80752784ae9cebbb0c86b4b8c1be9806e5255afd422cb4de02eb33c1e7ec6bf4. 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/SGB502532260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1202d492b67064b71314baa9a72a066de98b1cee572dd437b05ee7c8e86f48c2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GXD7V2514959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7187c31899597656accd086d5cba48fa373cc7ab79c345f2e89e48928744e28. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GXD7V2594743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e85dd9aa4ab45ab8025afb9582fac3f038c030d9b55d5413cd33bb092fcdfe. 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/GXD7V2564796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c2bdd6a4aa03bad668f8d1240d00397d8a6cba1160a699e92584ac4c3cd497. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GXD7V2532669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36b6a955ceecceb83e1ae943c0c7879948898adb490d03caeb8e87cf9d718e3. 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/GXD7V2535117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ee341be796060ecff5e49119a8af6d2c8ea9f7e36895fca0e37fe184a8f884. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GXD7V2581251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db5f40f5f0f61a45fd901bdaf5234f0e9ab42ff3715f4194340a766b2ebc15. 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/CACWV2551353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5d4441c4bcacb2415eb28d89c642f4235f10ae7c016123276fdac99e1094c7. 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/CACWV2551354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a9c34ed0f6e1ba53a9f6657044a57dadaf038920122420a43664bba0b01421. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CACWV2551355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea25c7f0e36c4edc9fb70a6da4b8eac53f073b2fa6904b2ead61fa3becbb132. 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/CACWV2551356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123f394e4a96a1e63fca2902f7d85992d8ec71a498e72c8dbc244c72a6b33c7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CACWV2551357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f13c14ac5ffd7981404ce7e5c2661ded7c16ce6b2aa9f44ecc1ce2062a6de. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CACWV2551358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d55981140578f4b85ac1df700ce32ecde0fc86307c87a4ef3756fa2a969c0. 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/CACWV2571177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4baee074d1e1d5a3fc129060a7d96fa2d881a7f28f74f9f6da0f787b6393b7a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CACWV2576323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5963006a266f600e1439da5a2ed913dd8f7613b2fdb2761bf06c376f54976d0a. 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/CACWV2576324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a9c34ed0f6e1ba53a9f6657044a57dadaf038920122420a43664bba0b01421. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CACWV2551355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f13c14ac5ffd7981404ce7e5c2661ded7c16ce6b2aa9f44ecc1ce2062a6de. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CACWV2551358.