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 0xd2407d19e164fc4beaa6cd255349d608d3bae668fdf02684b36318a319b67cbd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f36b880-bb93-4474-8046-ac681ee71dd2.json and https://artists.proofprofile.net/proofs/artist/7f36b880-bb93-4474-8046-ac681ee71dd2.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 0x36a72d210ea8a30f1bed4a02b42865321f874d4c4ebfb691e1d40c795949fec2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUGBT2420770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c046dc89c0e7e8e69988b8327b85e3433b83f706e4eb892aec7ccfa4aebf32. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AUGBT2415616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738fb5d6502873e3b138e74844776787d80bf036c2df30ad4bde06e014066b65. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2406693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1d224325cc8981b7b2bffb6cbd493237b1350663daf21400f570d0fc9243f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AUGBT2432821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9fe76059de35e679dc3ef11db2cc7e2eb93382191b3e2bac7c4afc8d9b46db. 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/AUGBT2406700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f31753a8fd355fba08ff56a3a7c2d8610f19bab9628a84df3b49884a57a4b7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUGBT2482109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741ca3467d40a258104a1898a86cfe1e80491afa3f2dadb910f49a9ee5de55d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:58Z), 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/AUGBT2426673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f0f88066742cf55da50e6e2eb7e1a63e92d6f3709ace9eaff6309b85dda651. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:41Z), 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/AUGBT2539412.