Hereford ( ) is a cathedral city and the county town of the ceremonial county of Herefordshire, England. It is on the banks of the River Wye and lies east of the border with Wales, north-west of Glo
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 0xfd6a05108f997dda08cccdbb583d0ccb47b9776212bc0c4b27cba632f07d4577. 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/4c07fac8-2254-41ad-89de-40a80c98da4c.json and https://artists.proofprofile.net/proofs/artist/4c07fac8-2254-41ad-89de-40a80c98da4c.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 0x23879a3ea4df223ea390260643aec38ea9780348cefdee3990aec2d530a709e9. 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/UYM121903409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ccd0f06bf13583c3381f2dc2cbfce51e49593d342da24a3d9ba67f78c2557c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UYM121903462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3e646a2328ebd123a1963ad25fb46c63b76f26dfedf2e12090a321ca2699c. 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/UYM121903463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e551296f7989483c07a7016f24c14ebaefa9b4752395881063e4a319de7535a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/UYM121903471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f4c8f02d6ca5c71b4064969a7d8d30d586f83ca0594694607485d75978b0f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYM121903759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd3c9179b251c79d3685dcd548ad89a804330a460fa5faaccb3f2c510c5e0d. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/UYM121903766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91092c080a66116eec9307841ffbc4f6e0bae2609658beb60ec5d6381ec877da. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UYM121903781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa388e3e123458ddfbb70d80aeea8b3170bf8feaf05b45666d41f69c7d1f0387. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UYM121903748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa9bc291aeadb01cf41ff15a3fab520f2682588f717bc4273db6a332f09514. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UYM121903752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2f7c6b5eee914be89ff1b3feb00c0214f04edbf32164e58b3b2ab880d6c13d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:17Z), 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/UYM122400638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdfea6f70a21923886c39676b4ab4e12f98353ce2c1a9573a4ba53cde55614d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYM121000525.