Derek Warfield (born 15 September 1943) is an Irish singer, songwriter, historian, and a former member of the musical group The Wolfe Tones. Personal life Born in the Dublin suburb Inchicore, Warfiel
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 0x860b33b91fd73fed71aa5b8b202ba279baac677998d41679b638a6f5fed03f7d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d83c365-7030-4b48-9b41-a86e5af4aed8.json and https://artists.proofprofile.net/proofs/artist/1d83c365-7030-4b48-9b41-a86e5af4aed8.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 0x5c52ad1758b139b26a99f6969a793da13b4ac3a149fc19e5856fd9ce371f05ea. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USHM20948435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d170d79d2be33ed89f65942353cfcf93dba2d50eddb24e0d42f1c2634a4810. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCGJ0957357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37568254f4bb889c53ea0f2b9fc1c053b94978f1c1616a69e24f36cb3fa13e4a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGJ0957374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed626bfd73f67bfe232699ca3de40ccac213bf0dd83e964b7bda1a70df2f85d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1012394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee51bf9848924f7fa81883a1f8da88c5ea5b9b6ce0b12ff081021b4dc21686ab. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USCGJ1009404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6d877faee484b46942ab81b17dc3a8f03423aad98a86297ec2fb008d37425a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCGJ1009405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6c972e867033fea889fb6cc397fca1797e76392ba91f98e1872fdd822a0ba. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USCGJ1009427.
Green White & Essential Gold Volume 1 (2 CD Set)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a9a9fa470e96f792d340a394a68256f3dc894d3f9a455b926c01f9a808a054. 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/USHM90982242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552a1d74f0396401a79bcd566e702a7f585af1b3ad36e6af71cf56279a69d5d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM90982243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f9cb03df3ebf815e9442ba65882e8cb7facca5da0f97a34162b2dd1b01add. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USHM90982245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cccdd6a16f8a65ee4f69ccab4ed59321e0b23420d073bd9db605661806553. 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/USHM90982246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b095baee2ff6eadd1a04461d52abee4fa510e40d88a6e46e19561aaacea0937. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USHM90982268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf988e665aa6ab4f5fddd577ac9d6a35374bb8d098b08217c11f41ddb1d29f6e4. 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/USHM90982259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd30a71ea7595d915486a787733cd5ea49755b64867902cddecd4bac3a62feef. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USCGJ0954794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7763b46e105bff8188a146e427ba3dc6948cc2cbc8cd98b59c0e13b7d367b5f4. 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/USCGJ0954798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e510ec5890185b920fa4df6e78075474070f1f90c394019a5dcc16c163aa93. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGJ0954810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb397efdde3d8914d4b14e045976f0fc663f0bb4cdb7d303d573e52f55b32a89c. 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/USHM90983474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49c8930313b91b8b5ceca04b9cef48668f24cb281cc2013d0e1bd8c71f718a6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM90983475.