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 0x2eaec1c0a06996a80d0e3409a88036588b8370382adab51689320bc68813de4c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975b27d1-4932-4617-9edb-cc2a1dbb7d96.json and https://artists.proofprofile.net/proofs/artist/975b27d1-4932-4617-9edb-cc2a1dbb7d96.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 0x25abbf5f7c0f4dd6d22b34e6b655f08ec12e79f64777d8e9ea7c061329c36b8f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:52Z), 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/QZFZ62432546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2fae12338ef78f4fd5db114c214e29882352846454a46a416fa0b98b8b98b2. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:55Z), 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/QZHN92588522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce2191db61449894ad48453a4b0a5f2b1974de5093cdae59f28438ef6c7750. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92588523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438d4af0470e2a711a7e6779f130009257c493fd91fa9ef8de532ac0aa1588b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN92588524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d70052a9eee1e947a1f52b0cf1255eb13a3af3eff105b826bfa6f59e8b25743. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:21Z), 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/QZHN92588525.