Toby Spence (born 22 May 1969, London) is a British tenor active internationally on the concert platform, in the opera house and in recordings across a wide range of classical music. Early life and s
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 0xd841a2a957641b38665d4763962dfb9fe8f38422816dd749e0d705930433ff9e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f62d2717-f758-439d-9fde-d1f5895bd83d.json and https://artists.proofprofile.net/proofs/artist/f62d2717-f758-439d-9fde-d1f5895bd83d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, JS: Magnificat in D Major, BWV 243: VI. Duet. "Et misericordia"
Handel: Dixit Dominus & Bach: Magnificat
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 0x6a2a00141dd3d29326051158e051aecf82a135a22cd2987a6b204c9457f36b17. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC0701961.
Bach, JS: Magnificat in D Major, BWV 243: VIII. Aria. "Deposuit potentes de sede"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7f33de9cd1fbab4fe146ebf681b9c7074afbd10931f91122703612534f460a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0701963.
Handel: Dixit Dominus, HWV 232: VI. Dominus a dextris tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc406c6c7feea9f40a208bb7987812704dfedb0103d6f741b3408f941407a9b54. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:42:58Z), 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/GBAYC0701952.