John Renbourn (8 August 1944 – 26 March 2015) was an English guitarist and songwriter. He was best known for his collaboration with guitarist Bert Jansch as well as his work with the folk group Pentan
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 0xca7906dfbbbda45fffc45491a5dce3dbfdbd6f4409af722fe4f4d8413947e3a9. 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/d680e0df-5193-4b83-8418-ba1af52f230b.json and https://artists.proofprofile.net/proofs/artist/d680e0df-5193-4b83-8418-ba1af52f230b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nobody's Fault But Mine (The John Renbourn Anthology 1966-2005)
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 0x8c56726dfa5d1d026b47e517c6a8956bcc58eb5ead986dcd3d696b1344ca5977. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBAJE6600211.
Sir John Alot of Merrie Englandes Musyk Thyng & Ye Grene Knyghte
Sir John Alot of Merrie Englandes Musyk Thyng & Ye Grene Knyghte (Bonus Track Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c142730bfa375002594849d0b43358dd5eafbf235248ea4dfdb8f10b9df03f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBAJE6800539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e64e7d1b37773daf48fe42c6e0900a77cb14616aae7e98a19127d11201425c4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBAJE6800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274302be885ab8d265fefddbfec0257720a7abd7546143e48ec19a55caf2f41. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBAJE6800541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd699c02a84214c7ad86fe5a96e2570acfd81f7149d9a4fe0fadc5b3a703bef72. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBAJE6800544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c7fb9e4f0a63a94d590c8294481d3711369c0d5f0ef376f578d06d9668c91a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBAJE6800547.
The Lady And The Unicorn (Bonus Track Edition)
The Lady and the Unicorn (Bonus Track Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4eca909add0baed351b4ba8862594c351062857f2d97ff6a092ba8c1777de1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBAJE7000702.
Lamento di Tristano - La Rotta - Saltarello (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4320d7f659f1148d7be8fe05d1653504746ce5ac39bebbc0bf285fdf2bb1f48. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBAJE7000739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd943b005e3d1b091ea79a8a03db3306a88fc184872de33074eea442138b0bd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBAJE7000740.
Bransle Gay / Bransle de Bourgogne (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d7ae27d93c3c9683018ec1c65f38ceaf1761019ffc60504bf9099f81ceb1e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBAJE7000741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba5427fc2f14bc883a124c8b5d24b4d0e0a6fdd4153390d829ddf3c89c307f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBAJE7000744.
My Johnny Was a Shoemaker / Westron Wynde / Scarborough Fair (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6464da0ce6921a325026cde7bbdeb1c4b4fdd95af1ffb8cd6b980b9334ac7c1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBAJE7000745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97a31cfc693584d22ab57ec06b9663d8d6dc01e18e86119d9ce076d5c0b37d4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBAJE7100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e92fd080d7f8a712f554709084926fd9cc90869d9fce4de369cfcb5117c62b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBAJE7100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b85c4c4a946d0a54770e254da96b4f4c393ca01128e5d461017eed51a46bbf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBAJE7600415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44afb4b48ea5f30ce692e789f775d063909bf3e09138afcc8809f34f9b7cd62c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBAJE7600416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d94c38d7c55289eedb2264f168461c9498e08061f6629023e1451973c796625. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBAJE7600417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5012b4af9e82b25d1cc14018c1fb070984818b5de6a1b64311a2207077f84b8b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBAJE7600418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14f36efdce3c209f7c777a1b627469a6102c33259dc0fa400b3fe0311471a2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBAJE7600419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e088e805bd352a53e306e70ed3b6b86cf25c4aa2db8bb1b0754af7d0cda9d1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBAJE7600421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21fde9ba40c28b1d8de3e04a75928602c1a451098656782cd98847ddb1e589. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBAJE7600422.
Kpm 1000 Series: The Guitar of John Renbourn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa743fca41179e1f33f668f48fe1d4380b1111c21ecd8f5005876b585dc62b270. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBBGL7700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336e5a508cd63064aa6d335876a259fb13eb841931b45f68a9c6609d46ac50a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBBGL7700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6dd6f7e75c0562e3effc54c408156554e9cb77cc1ec5fbe88bc0b2aa36cc6b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBBGL7700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba6c502405f24a43fae0019faf39cc59d97ec3d05abbf1481e98e10adec81a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBAJE0703586.
The Mist Covered Mountains of Home / The Orphan / The Tarboulton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ee280ea42f336f829cc7b814c09a1c10b12b41e0b053a098b01ed493f824e5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GBAJE0703587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec1106ab15b0a45e7222d88d81944c38a232905403008e710584f39edad72e7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/USA560558725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a521b22f731f660931c11adfc16292562793ecefe2dcd16caec417edf6302. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA560558728.
Keeper Of The Vine: The Best Of John Renbourn and Stefan Grossman
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513fd8cd25dc2988792b4c79520af1e98510135b4435fd03acd1c7d357327f2d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAJE6600117.
Sir John Alot Of Merrie Englandes Musyk Thyng & Ye Grene Knyghte (Bonus Track Edition)
KPM 1000 Series: The Guitar of John Renbourn
An Evening with John Renbourn + Jacqui McShee (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fec1cebe3a8d801440ffcd0e877ff3801b61b9f04d79f0b4c583cbb8ee25ec5. 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/GBAJE7001172.