Blue Peter is a British children's television entertainment programme created by John Hunter Blair. It is the longest-running children's TV show in the world, having been broadcast since October 1958.
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 0xce50fc4a720ecf4f625d82e00d0147daa1f20a2b02e7a29467013e1f79263824. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/460107c4-caf0-43ca-8232-08dc05856949.json and https://artists.proofprofile.net/proofs/artist/460107c4-caf0-43ca-8232-08dc05856949.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 0xc19d7230eb911ffff19781fca28ddf29854ede4e20efe5109e479c01179d2a70. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/CAOB20700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a93734b5c27543b78e4b92e018e019e19ab383fcbc514c791743ebb3c158a3. 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/CAOB20700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3478e6804a398b5ad8c1a173d57c353b9639f208d995fd481997a15acff87. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAOB20700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bfe002c0df08e27467fd38d920677a1c1c1a920d3b40a1102cdcd9ed3c818c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAOB20700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22951eb044524ebea921e999044530af16c5bf0d5b2c7d2a2f2f9929b2ad0f9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:48Z), 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/CAOB20700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cf4896ab3a923b04d08c0e5d74280c709c85106a7d0c44c2ee42160aa7aba8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAM190300479.