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 0x6f772899b38945f8bd42babf814cae1c84a2a5d0ed34020dd6aef882dcc5eb15. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaaa42d6-b4d3-4a07-9435-6909e3dfe106.json and https://artists.proofprofile.net/proofs/artist/eaaa42d6-b4d3-4a07-9435-6909e3dfe106.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 0x2a6673ebde87db88c4969d949f0c2180f646e326ce0e964029f8141c33be4a08. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PTJN18700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba68b25ef20c3522fd5a10a690c7d71ff7a5006d395a7e99541aaf107ba710a1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/PTJN18700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d525913d2b5d62e4125a739afda5274c8c773c98271d0b7a9b84541d396658. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PTJN18700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f603c523de7b17e3753509dc1bed6ac22fde5d7f6d94b0938a9a34fb5b79cb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:00:02Z), 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/PTJN18700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c240bc7ccf028c6100779550840f1490c39d7bd5ae1209af13700e92e3251. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/PTJN18700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16451e56fef3e16474a3908f5ac2e37c522193826cb20b5f31ccdaa51a27ba0c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:20Z), 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/PTJN18700009.