Will Todd (b 14 January 1970) is an English musician and composer. He is a pianist, who performs regularly with others in his own works. Biography and work Todd was born in County Durham, attended Du
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 0x683111a51624afb77478572f69639147f5abd60d10497553be4f06d1dd9f3ce8. 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/23964566-dc54-4dec-b8bf-30826f0ee1b1.json and https://artists.proofprofile.net/proofs/artist/23964566-dc54-4dec-b8bf-30826f0ee1b1.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 0x897dcbb499a5aa0e659eba2e2c9d85a3fe7ec3c16a2877db459c93bb815b34d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX9BU2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b37e039d230cb5edbd7d85408d1c93618480612610fab7ed54a70c8042684b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX9BU2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d30f7d3061662d8db5ce1dfe6fe30014df160dd6ee4911e625c4dd7b4f94d9f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GX9BU2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22048535a2c786351229e79a7890a26f2c191031352c952e197bb689e1e0a3c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX9BU2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1905b44fafa3a35aa8e61d01551122ee4ef99dadc290c5939daa6322ee3a1f81. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX9BU2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf091d5480475f683adf2edb7a5c98381fe20c64aaadb99369c79c8761afca0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GX9BU2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64685c7bae49ab04bdd2bffbd5cec74eb3d1712ddc009abdc726f1e3893852c6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GX9BU2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bfd2c6efb07fef072a657b33fc6d4cf4f3dbe911f0a801e0dee8ec61bf05dd. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GX9BU2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8b8ccad28be2a120a278d4c416f4123306f57d25e7ca4cd2db68747a23cbf7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GX9BU2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968e149845616ac4eb56f02e8a486d7f84b6bf4a6582addceac04c5eadf6cd5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GX9BU2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0cb0bd5ff0b54592ba02dc148a13e49e353a0e61c81f25b8d3159aeb46b97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX9BU2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb22a5bc326a7958a09c2c0a5cd8114edf365991fe1972ba93240b86334d7726. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBF071403970.
The Oxford Book of Flexible Choral Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c892d07e590385d579e1db4e2f7e2ff2ab981f741dcada9a1c588bffb63915a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBN3Q1901595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a33ca9fa409db47fbf376c0dcf7104294f67747d2f14fc34b869a236c44cbd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBEJP2219101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919c97dcfaa5ddca126d01202e9901315331b0d633cabe43900ef8db0d6e148f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBLLH1957218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5028165dd8b751dba796f34c1031bd84e090a0bd1bc3703a10f1e7498a453. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBEJP1614607.
The Chapel Choir of Pembroke College, Cambridge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106ebc6d6a43e64a59a23a458320aea0df549ee0df3210c1bedc345aa35b0b8a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBLLH2272412.