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 0x7b004bce9e80112de60714db00463a22be0802da891fc1fd14fafa17d962d663. 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/d19bdc32-fce6-4d9d-a842-713a5b53ef01.json and https://artists.proofprofile.net/proofs/artist/d19bdc32-fce6-4d9d-a842-713a5b53ef01.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 0xf2c917a7a54e5a01c50d97e7e64a69a41bf58fccb27491476db90a926155fb1f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:07Z), 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/USX9P2013866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbb27ba0412ce6a3bc7b5eb5a01775b86fb2a980069215fc81464f354c14a0e. 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/USX9P2013867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09902c0bf92b5995fd66f6bbe37f2a9f61e901c2e8d568afd8c4208c0117c274. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USX9P2013872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c751d1a5ae3f2e4ae61452ce2fbac99bcacc987159e0d77b9c578be7082b3d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:09:40Z), 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/USL4R2073653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbeb1e3b9b0d75430afc6a9a1317c8ac7487cc413be57ac4121487878523bc8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USL4R2073659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e50bfe70ca1ba3a3ac0f6c12739aca20656f769c87f1110970c553de3f93c1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:17:52Z), 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/USX9P2013768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1793fe2e5a5edb040ecfe2e2c81f2e1c8f84e052f21acf0cb1c0072132ac5f. 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/USL4R2032803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1d8aaef1a8299ad85757fac38b1c0fc47d0aa147c40ff19abe2fa9316fccb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:50Z), 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/USL4R2032804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb282892a5842f3a31b48b999a81eda9c295416f52027d94d901ee6750d401766. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USL4R2032805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ecad13e5a54338fef144ae773d4fd599c615111b976cf807aa1c2671304c4. 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/USX9P2013788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c36a6f6f4023ab5fc85235413ca1c3152e78bff29af1039790bf6a986d5ee50. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:47Z), 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/USX9P2013799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8cf667a6ac9dbda68a4c08e06f3e4f8d33a5b23a683742b207a6e08d060f8a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USX9P2013760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38f55d1c11cc7b8b373c6d0d8a03a5ccca422dc5073349ce9c954ed86c26ec. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:00:56Z), 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/USX9P2013781.