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 0xe925b11642c0656dc9d49fbb2e0a198addeecbd994d41f336d6d594a192e56cf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a94de68-0b99-4060-896e-26580596e563.json and https://artists.proofprofile.net/proofs/artist/7a94de68-0b99-4060-896e-26580596e563.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 0xb230a57a2635c5d5b6ffcb4d2208a53d6523858ce84eeb1db9ffba02cba9c276. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEZC62145051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a8a6a040c58a720c348a8ba4d8be4ac1fe958b91414ab3b6800eb6f1f5d6cd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:17Z), 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/QZFZ22557817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bd0689775ea50463e95f919d81af1b65a095284f3b1740fd1fa162256a53bb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:07:20Z), 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/QZDA72505136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d091269b3496c274e216e20785d503bbf1a27d173caeb397b974ce329d6c89. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA82515924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34514d199223f223837842d47c88254a97ef3474748f9a356a0ad4a3fb8b27dd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6J2545541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9748ac3794c45a4f536a29f8ee483977663663a4910c35a4afacfaba75aad9c6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:27Z), 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/QZK6J2545542.