John Alec Entwistle (9 October 194427 June 2002) was an English singer, songwriter, musician, composer and record producer, best known as the bass guitarist for the rock band the Who. Entwistle's musi
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 0x60a9f2cc659cce142047f48791a964e40cd650c9d68d19e3b470a3bd02f86c86. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/963f2221-2b5d-4095-84d2-7f5a1a8fe75f.json and https://artists.proofprofile.net/proofs/artist/963f2221-2b5d-4095-84d2-7f5a1a8fe75f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Smash Your Head Against the Wall (Deluxe Edition)
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 0xef2db127f4f883fa06c8239171513fc0a2a8bf60b0cde8f431466e8a83e400de. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USAJE0500554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a230ab5618ee8cbdccdae6a8231517727bd21cb1a6022ab5620a9fdd290d8bf. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USAJE0500555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994098f804e9e3a925f7da3c72b472fa25bc04329b278a24db501f862065ca5d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:13Z), 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/USAJE0500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0a07e1fe7f2f37dcf6a2d10487c8495c0b1d2761c7575ecc605bb389b2ddc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:45Z), 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/GBAJE0502753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa65ea03d258d54cbc43760ae8c228d5259ad0af807678f2dd2d418a6318b236. 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/QZTHV2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e0a9a82a9a062dabfbc96cf296d4807995ade285770488aadea5cb7c66e65. 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/QZTHV2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b92218c34b44c69cc1661e8fe149d22bdfb2e5a765c453cc17271099203ca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTHV2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c2492b1123236c99870e3382fdb9835c79a84ac34323ee4681ded73b5813a1. 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/QZTHV2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec23935eb77d511fbe5c9c88033ba59c841bc1f27b74c44e9ac09092fdb10ac. 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/QZTHV2200077.
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 0x59c69562625af4fec68933c10f5122d265f1007da7f88935a07ea623e6a60d75. 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/QZTHV2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeea18f86247801d7e000081e0614d10e34b933f72e01e0dced96277fb01563e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTHV2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b325314ec25b8565ad37c10b8051f3445c259bf6fcc3b184f4256315740c50. 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/QM6XS2000630.