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 0x42c355310814c9a8dba8c113e389f8575780fe73b77d0a4aa179b46160d92fb6. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66e68e2a-0cc8-4dd3-ac13-3f4723861f18.json and https://artists.proofprofile.net/proofs/artist/66e68e2a-0cc8-4dd3-ac13-3f4723861f18.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 0x669281872a550afa7169a55db0b370a69504c5f82d786c4e15126ac7154b4509. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM91628032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ee5ede6ffab11eb406bc41d8fe9790e96fddc4daa5cddbff4335e7a15d9b3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM91628033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21869ed05ae541ff84e1b9d615d74ad96f2be0be3473f328356c058c2de8e784. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:13Z), 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/USHM91628034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd44c8012dbdf0de4798a6255cfe58c0164963ab0cab545461960d4ebc5b84f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:36Z), 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/USHM91628035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57231f62753626f26d8d89f56e748ef8228cd3768ba120f2578721caf0b8f0b5. 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/USHM91628038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578cdf1ed8fcc4f73533c993fb12b3536e11df848780dc34651664146d024425. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USHM91628039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491b2d401574bb184f0d4e3a92b12319a9c009f16bec3b9884558f147ac4453. 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/USHM91628040.