Warwick ( ) is a market town, civil parish and the county town of Warwickshire in the Warwick District in England, adjacent to the River Avon. It is south of Coventry, and south-east of Birmingham.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210988ac9c8002c5f89ebcdbe61649c245b0a196037f41a9bc569cdc6a82f8b2. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32e72cf6-dc77-4df2-b1aa-4b76876bb0be.json and https://artists.proofprofile.net/proofs/artist/32e72cf6-dc77-4df2-b1aa-4b76876bb0be.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8520927731eae395690e44fc9f8fe8ef82c38d623b8141a565e1fb430acc67. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBF2429887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9a8590564dbacfd648598bbca4b86808f0a2686ac9d97b9c9b0fb3c15dc25a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBF2429888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515bc02af6e2fe2f86427dec3bf9aae57b14bc63ccb9bdd7945c258450cb7022. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBF2429889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96534b1511a26f23e069b25f10b61005fb00db2f8a09bf81d6a9ddc8e372ca66. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTBF2429890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bf6e0867e068796684cf2487b9b8b2e4fa8227b927b8e27e646eb663794cc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2429891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4425af1259a10de5aeb8eb9ee4d26d65a50d2a0b8e3a15cc2d174a8d757a6d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBF2429892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372fe34e57c82d3893a977d96327e31f7053b049c52a62071c5588ab586f0846. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTBF2429893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31052437be736bc11525c1e113f2fefea1ce1c6f411cef5823dcbc93f6fadedf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2429894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190389af301ed3422673276dcaf8db2dcf0b78e2f06626ffd688804a88f856e0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBF2429895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aa9931e343d6869ee8cb66bb96da4134a5a748a496e1ffb2edff7d1a865e55. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTBF2429896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcf838f94c191d7098b9f4aaaa12958474eaaf58e37e66fb688893c72efa835. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2429897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef365a7c51df90b2347eba545db866f76b877c7f0019e642e4ad12eabb739665. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2429898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185afdfc2f024deae1ad92831d93d71aed7981707f62d8c0a2e67a51c636faa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBF2429900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e1f21ab53cbb29fd7aedad36c7847aa5ba5c84f6cf5fb284a8c30a765a2f5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBF2429901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6739a999260e190cd2215eba9052a3ecd6c6817a3ccaf845b1e245cd468ae. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTBF2429902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39c33f11ef45759b5d88e513689d060069f97c06b16f732a9dc985a414fad6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2429903.