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 0x80c8de1d049454384564129d0b9eaf7a5f1e584e5d2bc9a4e7889b0785f731ba. 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/6321aeb6-db0d-45d5-bff9-d92a65076553.json and https://artists.proofprofile.net/proofs/artist/6321aeb6-db0d-45d5-bff9-d92a65076553.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 0x32316ff21a5ff3409151377df28bb29ce9ce49b1e764f6589b7ea1ba92bb9029. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ93L2017119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100767ce026b5b9a35cbcab02d87f4f174d3e88f546fa2a6b95cbc03ae5871a5. 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/QZ93L2052419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3752b1da21af54b94b06e0583110f0a0f8679e1f786428c78a4524989604f0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:16Z), 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/QZ93L2026622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b350871fceb3a6b7cd328a58e6557d6e187ab9c9f2fd53061ed5a1d9c24ce7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:39Z), 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/TCAGL2213587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7bb86a5263409b7d6e8b1160012b0a7ad6fbc34ec2815f700628936fbbc16. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ93L2119342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ccfbdce29ec2b6949ce62b429420c853be68bf7d82c621ab30bd4fb17cbc96. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:31Z), 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/QZ93L1913414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3b9ccc68237b51d01512a305a290199fcaf401fde6e00478cef140611f453. 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/QZ93L1931603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee9603661afae0cca5bc614b6a841310055b9de59ba12dde79d8bd2a574651. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZVEM2523524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a894deada058ca7abee579ff92d2c73785afb3fb05b5093f667bba8e07a326. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZVEM2523525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bcded0f2eb93970d29a2919a0c66840b6fc2c04dcf37ec7823932622d76e1c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT4K32585610.