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 0x41f3e876f8c5596ed28f74af06b6aec3c44dbfe6835010c3e43a08428e56c273. 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/25c8dceb-abee-4375-bfd6-03fe02e56c97.json and https://artists.proofprofile.net/proofs/artist/25c8dceb-abee-4375-bfd6-03fe02e56c97.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 0x3f0745adec3a2562a0536545de7985aaa66d4a26961063351e43cd88b0c1821a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWV32321281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917fe8f057a406e1d10ff7dbd240b4b36c4cdfd3112d7c51ee6b9ab4e0460d9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZYHM2407909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3faae1125a6c129b3c8492f8bd8401d2afab682b523acddde8e35619f80f947. 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/QZMHP2587510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b6d77ee831629d09759ff1ad0859b385a0e755d3789da4b1a943b0b0eb712. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZMHP2513169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faeabc653e1e96ac1ddf5e8260b22ad1cc621a4f77ad9236926bcc3449910b3. 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/QZMHP2598350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5866073485b0fa81b301594182573d2347fd2d218b315eb30cfcdcd220c175db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZS642507799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb353fad598f758856e9022cee1c2fef63099ee19784765ef359666491c928f7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRX202542823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f145b8c092eae623dc4d2213ddf5bc197c69775e22ee4d61bbaac4524eed67. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:04Z), 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/FRX282512592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03b1212388c3fc2b856cc972ae31f78cd41707f3e597d8e4287ec625a01c9c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX452571353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f573a8889f94fadb20c36560c97bb0464b5fa424397fcd22700b79ab4c53b6. 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/FRX762528353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9a9983bc30092f98afafe5ab5e04440e150b234722922c65562c89d8d9dab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX762566852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b5cb55ffd72f24bc1857c1caf29b928cb7f5e8de620871bc785976e14c3d91. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:30Z), 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/FRX762579767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea1559563b0f5766a2e28c14e120c4500e40d21e8a63ac6d49aa43cafe0c4d8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:42Z), 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/FRX872598796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e4d27f36a6b9940d71aa21360d45b9f521b69960e33c206626fac864c726c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA062514328.