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 0x2fb9244d774a12d30f513d17000225468dcf7b39e260aa7f2a991b34f69ed495. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb6fd79-fbd3-43b5-bf0e-6e4033027248.json and https://artists.proofprofile.net/proofs/artist/acb6fd79-fbd3-43b5-bf0e-6e4033027248.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 0xa88c6cf501dc8ae086ffcb88f89e17633f106cec1db476c92989e100f3a290db. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:24Z), 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/AEA2M2130171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b25254ec78ab692efd87dc3bd394cc0e614bb5797c22e92b79edaec7a6b503. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA2M2139338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e1820b6386bc141931eafa22875707fc0c2e60236120e786976781ac2fc765. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2M2139340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fce4ca6ee0cfa25247a8efa0fd1b8add4a2239d309cd3968b0c4cd48cd1a134. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AEA2M2139342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2257d515df002df3ff577862849f2c0d2afae3692531e6a948407dbc7e8ce2. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/AEA2M2139344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2be0c7bcc42a701652e80cfd1d19d7e34992e7342ea6af3d7417138d5e6c2e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AEA2M2139345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6708d288c4f7088be717c431cb6ce2265f724fdb3971ffde6685b0261696fdc. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:13Z), 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/AEA2W2313972.