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 0x9e0caef7e09bd1747097fa49e8072392aab5f9b764d2781073b42160e903c203. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41b08e11-efae-4720-a2e1-b2f4b00b31df.json and https://artists.proofprofile.net/proofs/artist/41b08e11-efae-4720-a2e1-b2f4b00b31df.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 0x9beaf6c43ac1f55fab2a3eb652e37593a64a28127a209c61f29dfb55bf58ac7b. 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/USCGH1856620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e94bf65d508e3948f5e320e6b80affbbfee0a10ebf395bec891e3457f9ca29. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH1856629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ae8027029086e848aa5129e1996ab5851a521dce8451dc445e5e65a83f0ca. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USHM92094550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7355323c899636344ae7ea1c7d037a6e63e5b750a45f9638338e4e26b025c97. 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/TCAFM2128003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae1f7909d9a1eb9f557ff9fa0439f503c6f280d10d2e1f0db0027d83e9917d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGJ2365755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fc4b2e420948e27ea22186f2fd9a94c26aefd324412fc4bfd9e8d0ca135252. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:30Z), 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/USCGH2423279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c9e4f8bd9fe69f7bfcaa0bc6d005d50afa27c402d79a210b037bef81711e7. 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/USHM22458196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb845657f38a3b04cd968e23dc73c383de4807f917292da490847039e862d3fa2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2589140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec017d152f40dc721e52489aacff0e2db36e6f5d83ae9ee48bea6363cb21bce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ2599389.