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 0x117732cdb53513eb5c69d6c9026b7a77a96779c8ca4892f5516e0ef8067e94cf. 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/3f38bd07-1c3d-45c3-a591-26df7e43a253.json and https://artists.proofprofile.net/proofs/artist/3f38bd07-1c3d-45c3-a591-26df7e43a253.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 0xf527ced593ad674e6c7de65b5a443caf74321ce4918fc2ea02302e488e4fc132. 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/TCAEN1954286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c01f3620f3c1b45816e5cc665e7e0a7e78c306378721e84dfef2f51c14c6db. 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/TCAEN1954288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e55be3957c4f5530e9be80a5b9fb7ff8c95f3933328dc28d7c9cd11a9aa71. 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/QZNJX2051107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe225ed618abee196eb9b4f3a3e08ccf7b86da65ce31a815080f22afcc39ddc79. 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/QZWDE2373625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46772885ff75830b7e0d319dd78c1aa31bcf7dcfe035ccf7045f0c3671955494. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZZ8B2317491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d9e773d49b977bf7d723e2a50bde16a796c507b889dafc509a6ed5691c0699. 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/QZZ8B2392053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3746291f6ba0af4a6fddee939f21995865d22e10b49ed90a4f8f5a66731ac. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7819577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3746291f6ba0af4a6fddee939f21995865d22e10b49ed90a4f8f5a66731ac. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH7819577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878161a6d4ec9e8c1cd81fd641d07d797bc4ed0e16c13ecc7d6abf26c1eba6bd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH7819577595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3746291f6ba0af4a6fddee939f21995865d22e10b49ed90a4f8f5a66731ac. 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/CH7819577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc862b053ea436a2cae47b80e4a6e0a9d744431904964a5fed2cd2c204cc05ba1. 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/CH7812534413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3746291f6ba0af4a6fddee939f21995865d22e10b49ed90a4f8f5a66731ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7819577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe014d63ca2f794986ce8e2082356df3bea28909ce388fc7d20d1d41116ed3a0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:51Z), 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/CH7812534414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc91f565ec2c1d5a217dca5f234a554e3a7fbf86c69a7a48b85982a7544b0dc. 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/CH7812534416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6bdd86af17d36e520f5ec7946e0dee19c6ea1f9204dbab012e13ce026794eb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812534417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde02330515f9c791bda61960055b323c881346e429f7512d0a29996a30754d7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7812534418.