John Toll, (born June 15, 1952) is an American cinematographer, with a filmography that spans a wide variety of genres, including epic period drama, comedy, science fiction, and contemporary drama.
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 0x15da171fe7a48b254b8a4cd7006e0b66f916e1705e4493476ebcb2e1892966ca. 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/bef917ca-f468-492f-b683-adf68f8e02f2.json and https://artists.proofprofile.net/proofs/artist/bef917ca-f468-492f-b683-adf68f8e02f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Purcell: The Libertine, Z. 600: No. 1, Song. "Nymphs and Sheperds"
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 0xac29cc38c0ad01a107df06482da81e7f46619006ffe8d159574fabffa02ed2fc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAYC9501743.
Purcell: Oedipus, Z. 583: No. 2, Song. "Music for a While"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4dae40a304801545993432bae0fba59bf795ab4d9e78cab29fa59b4e6a3b8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAYC9501767.
Purcell: If Music Be the Food of Love, Z. 379
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567918800282bd1acea18e4edd43f36132c60085c96a6240af6fb5bfa28b0884. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBAYC9501768.
Purcell: The Indian Queen, Z. 630, Act IV: "They Tell Us" - Fourth Act Tune - "To Suffer for Him" (Orazia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f479fcffaeff8682f9e87bf4179411f444f8e5667fcf9de454d014710cbaed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC9501748.
Purcell: The Fairy Queen, Z. 629, Act V: The Plaint. "O Let Me Ever, Ever Weep"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf51bd775ecefadd45d4786bf450ac9014c7336c55c130bacfe5a5cb271fadf9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYC9501749.
Purcell: In the Black, Dismal Dungeon of Despair, Z. 190
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5726d887432cae6ffa9079f2986b171ea8399bb4921a236c3bc138aa9e349c. 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/GBAYC9501750.
Purcell: The Indian Queen, Z. 630: Prologue. "Why Should Men Quarrel" (Indian Girl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c1923dcea1f991703ecc65243cf4d571e0e3f035ee5b9f6cc9f5a50e817e5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC9501753.
Purcell: The Indian Queen, Z. 630, Act III: "Seek Not to Know" (God of Dreams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74f734650bd12d6ed1bd2d2e0dc9cdef34241c425357fc9fbed28facfab775. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAYC9501755.
Purcell: Bonduca, or the British Heroine, Z. 574, Act 5: "Oh! Lead Me to Some Peaceful Gloom" (Bonvica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e61b43e8b0d98107db3d2c6d512a533b50b62a7204074dc2e3ec79e31025bf. 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/GBAYC9501760.
Purcell: The Tempest, Z. 631, Act V: Song. "Halcyon Days" (Amphitrite)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f4f78bad4d48751476d2d9414fd6d5b02b98c8a10d41c7fcaeb3118df0d5f4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYC9501762.
Purcell: Come Ye Sons of Art, Z. 323 "Ode for Queen Mary's Birthday": No. 7, Aria. "Bid the Virtues"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8215eec9b8758c48574d844bb57726edf87cceefc6d8aa71a771310c957b78c8. 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/GBAYC9501763.
Purcell: The Fairy Queen, Z. 629, Act III. Song. "When I Have Often Heard"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7e2c111cbfccbfd2f34d1822c6159dc99570ab69d1958d84d87c83e3bc11a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC9501771.