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 0x54ff31dc21aab92a4b6dbfab6f25bcddbab30c519aa7c369b16b37e68dce9a99. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92115a31-d384-4f99-a5d4-a8649a102923.json and https://artists.proofprofile.net/proofs/artist/92115a31-d384-4f99-a5d4-a8649a102923.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 0x81383db524074c26a0584aa4ef1c3903a00840d968ce0aacb50dd7c82087bd0b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZW9M2354881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87af9f5a57fb0678b43bae2d6474d22697fc1653f39026af1297152b74358b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:47Z), 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/US7VG2456966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c16b7936f7fe5163d1e4d8227198b5cf59f7c2fa82830ea0dae903b9e357a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ5AB2430153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e62c5016d50977518627b186df56b270870c5254593a763109042757e7629. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:53:41Z), 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/QZ5AB2477854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9752920ca56e00a2226cf261ce9fc2e84183326b9b03f8c908d5dac978a56f9f. 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/QZNJW2424932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9741d8977761a6eadc5c4bda161369a61c1f86bf6bd235143803c94ec33c63e4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZTPX2401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef57ba955892c026f07b7880edd470bd9b7e20060a46bdeb62288cd0e925e671. 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/QZW9K2480624.