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 0x727f61586a234b67f154f42fce4315964860aa7065e3aa710781284f2a879cc1. 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/95189104-50a4-4c9c-874c-13ffbbcf9afc.json and https://artists.proofprofile.net/proofs/artist/95189104-50a4-4c9c-874c-13ffbbcf9afc.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 0xbb56d4aa838c818d5d564622939a80e3e1b958ffbd5ee3ed7a46be7dc5423db8. 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/FR0Z50017969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0c21c78843a94bac6aa0319bffa706c5a7bdbd3246492eb41fc4f7fbef507b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:36Z), 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/FR0Z50017971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7c30e703751b2b62294a4c23982109e3d64e28a937cea2bc7760ea3a20031. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCADS1863668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cf18534791f92ee14ccf6749a55cf081d04bdedd7bc30f399f528eb977b7b8. 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/TCAGT2307460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f6690a11500dcb9feb4fda495625c033c471572300923dcd0e7e2ab5b47a25. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAIX2474619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba241ec73cd4eb0326a345dc8f7242890fcb3ec2528bc6a035a3e0199b7bd5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:38Z), 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/TCAIX2474633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e432617d2fe3a844a057fa9f7dcb95d38b6c80db3af3bb10ed1ac469882e341. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIX2474644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe513f78c37269cd12b934a2d932a0646370d41581fe40ef8763fde385446f409. 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/TCAIX2474437.