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 0x6d03e9c283eeef2bc1e6f56492e51d4dc66f9d27b28b1a129a6f9518a79d3a6a. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91b6c4eb-575a-4385-8130-0ec93ec1ec97.json and https://artists.proofprofile.net/proofs/artist/91b6c4eb-575a-4385-8130-0ec93ec1ec97.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 0x2c4b76252cc71b6eeff6f9f4623ac9528b66c9802a0a5cfbd1cc5f283e9aa54e. 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/RUB422203048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91161dac497fde865e865603e01a6053bbdbe7634c918db43acfe2d026e1dd. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:11:16Z), 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/RUB422302257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d1a397ac506546db2eee24038cc09fe5a5b115c39dd7454444b1d7139c49ac. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:47Z), 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/RUAGV2404097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa5ac4f0ed44142949ea672613f2cc3bf972c2e2060882f33663fbcbeb18e3e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUAGV2405896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4412032898625083252acf1b0cdf7b066163d1f6f7cbe643b104b19436f63079. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGV2410374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79931b0843f75a6139aa1ce21eeea1b87379e889a93cf35d2bd049e5d2894549. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:27:58Z), 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/QZNJX2547786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e873a6f3d85039e0da0fcff35a1693d1e7aefee279c79eb94f097bd889758e1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJZ2532486.