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 0xe5d74d4e0729cd6874a750dc4d977f7e3a10eb7f48135ac71e092d3c22804367. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fba28550-d3fa-4974-a96d-28c959ff0061.json and https://artists.proofprofile.net/proofs/artist/fba28550-d3fa-4974-a96d-28c959ff0061.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 0x35c3334921b5504eb60d1a9c5821b3593dcb0ebea083d1093178c9686aa32330. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWDW2434187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d4eb8aa9fd10fbde126bc8ba351154a2f722fc36bbedfa8be64e4587ff7ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWDW2434189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547a6318be32cb441c44d6c8d3beb9124a90a28931bdd09720a531dc0ce886c7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:49Z), 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/QZWDW2434191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548faa4f847c3a81dad5d8cc38e972620151a697fa151bd4032f5918a7bd6c5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDW2434192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6bcb01709f089c1d073a2f2032708be5c45fa2346d92ffdbb7e88765ba9e83. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:31Z), 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/QZWDW2434194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05854d65f488fcea4d8e05b1e96843440b9b7849cf2e75b65168eab1f2dd1230. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWDW2434195.