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 0x0faafcbacac988b40d9cd4c75278d4cf4c045fec8a52d892de66c31fd7c1263e. 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/0a6bb811-bcbe-4e1f-8eaf-318c92f94eeb.json and https://artists.proofprofile.net/proofs/artist/0a6bb811-bcbe-4e1f-8eaf-318c92f94eeb.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 0xbb3fbd27230e452c264a8fc4969bf9faa849b133ff08186976f9d65133b7b926. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:06Z), 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/QZWDW2448258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2947b3ee584aaa649e8acb3946f9327df67300d0b64792a7fb4bec1670daba61. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:02Z), 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/QZWDW2448259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad249d82e283ef400084dbe89811cfc5f2ce121a41e4b17d9b3d85dc5920a7c5. 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/QZWDW2448260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52185b3ee88295d6910450b3b435786a8ef2e0c0e2c2fcfab0eb711696c537b7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWDW2448261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2700932dfa75226b53108260d5e357af67aa6202e030d9e2442b4f5e7f1d6588. 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/QZWDW2448262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6a56fe32aff10cca1d2bac2733e89809f8bbcc20a17f57e272267d063702f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZN882411602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fe354b4139200b97f4b4115c022bb14c66e1905dfb1726b6d1e2658f579efe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZN882411603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aca8897010078f875ed21dfb4fc2377b0868c48627f9983dd81d446162f00e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZN882411604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05178241b7f1684d0790662d726e551f206b8a8cf1aeae668ce9f05aa90c81. 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/QZN882411605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bc69c2b55e91804d00aaaf07f7363b5fb2b6feafa89f28868e7db1eefcd35c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZN882411606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5534fcb43607bf707d6af8124016f4fbf671f757e656680a2fb44e2ecb202bd9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZN882411607.