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 0x72842fb75e5eab45ad3998f94ec24f402a6ad815c64069214e5f3f1f520f1530. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e51782aa-a461-4c41-8f67-e88ff1157d0b.json and https://artists.proofprofile.net/proofs/artist/e51782aa-a461-4c41-8f67-e88ff1157d0b.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 0x68496b05755289059453e6ce71ae1334e1cb15ec1fa18b7a3a445e0dadf665af. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFN2173048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb85dbc94aacb60aff737fdb5f675c6cd7751cf3d0a19c84c7f17f859680060. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGD2297301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9eafdfc2326dcd8a2e365e12e095eef4a0257a116377a1c264cc4f29f2660a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:34Z), 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/TCAGH2265837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d123db935dbd058c374ef040af69f335edf998aa43fead30fd0f08c7433595. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAGQ2251113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e1a01595fa58fe2af1c8671444fc83a364ccc0ea595d99f646171d7f6203a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:36Z), 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/QZWDE2317164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e1a01595fa58fe2af1c8671444fc83a364ccc0ea595d99f646171d7f6203a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWDE2317164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e36e74fa7935983a94631443a5ebb6d788dadcd889f0ef3a1b81eebcb606772. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTRX2420219.