James William Acaster (; born 9 January 1985) is an English comedian, presenter, podcaster and actor. As well as the stand-up specials Repertoire and Cold Lasagne Hate Myself 1999, he is known for co-
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 0xde63ed92f7bf26261a48f5750e522e6befa5b52a57a7c3affeec4b8deb2b0413. 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/74ce2a62-46c5-4cb6-b610-da4b8f749aff.json and https://artists.proofprofile.net/proofs/artist/74ce2a62-46c5-4cb6-b610-da4b8f749aff.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687bfd563eb4f6813a0dad623fdba91a77534f06bcb005de543b263f0c1a250d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBUM72404663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919792bfb4e4468cc29711cf0ca8937c6256e74779a1941f430addd7b0de737. 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/GBUM72404665.
You Don’t Have To Keep On Doing This if You Don’t Want To
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc8823402f93110afecab89fa1aad99d38eb3be0920a17b3e245116455d7178. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:32Z), 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/GBUM72404668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ea82c2e2602b9e1f1d917c1718900327197a0f63f988265f2285f30ea2b057. 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/GBUM72404669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519f98e6368a1b4f13e7e5ee707b58778d95206d8be75fd2d3c3565c981fcded. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBUM72404670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92813e75a02464dc555a5adb1d42b4daeeeae11df51edb0ebd79a136f777c295. 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/GBUM72404672.
Please. Stop Messing Around at the Comedy Show
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc186cc14504ee7e0404408bffcfef52ba645d8272bdc4c311a9b5e56921c6795. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:05:51Z), 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/GBUM72404673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3b52100b2b0c6055f6a78070d3a3228958acbac7ed1b0820c4d800682455b3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBUM72404674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d1ead9aa35344bf9ec038b29bf00c9f3d27d131189397d5ee7600c1b303dc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBUM72404675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed120223e38cf0f121ff5b34a9323bcde3eac346f0a8f1be69005c2a8c8995. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:06Z), 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/GBUM72404677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782ae67f5e6a33c0ca32eb5c91ed9ecdbcba28542e862c869ad1c69aaac4966. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:32Z), 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/GBUM72404678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ec14d03d22145063afbf064fe8d4a1da745c32a36e2b98037d2da2908bd164. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:38Z), 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/GBUM72404679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24dcea186705089b8634eb94503a5a7e5f8eeb01c1e8a664ce8b098a7bf8d35. 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/QM7281860673.
He Is Dead and She is Bad (Party Gator Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8477f55bf3a14a2c60b719febedc2321b55f478e3c7aa25daec1eea7df96d6cc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USSUB2246609.
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