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 0xbd749f76ba64725e577c451712bb4ce68bb5320317ab7ef6b86c5f7af245c590. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/648ab3bb-e85e-4fb7-af0a-1ed5c1d2a252.json and https://artists.proofprofile.net/proofs/artist/648ab3bb-e85e-4fb7-af0a-1ed5c1d2a252.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lens Chants des Supporters de Football V1
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 0xe95527a5c1db57abf32895f1413b6f9ee7d659b61d9ae59e023ae5a850a9f35d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU3468516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75896257dea575f7f039e240140914dfc00f139eeb9f62bf9b7989f036ec281. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:09Z), 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/GBSMU3468517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622e70f961497fde92cec080a766349ea21c0bcd09bac3565fbc58738bf59b3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU3472105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b65882e9de4cab634961325c9f5e0c7c568f904d98b797b87bfb7816c90d3e. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GBSMU3472116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e41910ff3872baad3fd0d595c03f9c28edb2c52b74796ef1a2ae49b7ab10ab. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBSMU3472134.