thumb|Colin Tilney in 2017 Colin Graham Tilney (31 October 1933 – 17 December 2024) was a British-Canadian harpsichordist, fortepianist and teacher. He is well known for his historically-informed app
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 0xed54ea2453547c3725a0cc97157c604a4ab501486636688d96378e880a156af5. 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/5b4afc5e-c627-4761-8719-7e7d3aef27de.json and https://artists.proofprofile.net/proofs/artist/5b4afc5e-c627-4761-8719-7e7d3aef27de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, J.S.: Concertos for 3 & 4 Harpsichords
Concerto for 3 Harpsichords, Strings & Continuo No. 2 in C Major, BWV 1064R - Arr. Hogwood for 3 Violins: 1. (Allegro)
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 0xbf23e062ea442b334a74f74ee1499e02a84ee20b093d2ebf07633cd087e2444c. 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/GBF079010461.
Concerto for 3 Harpsichords, Strings & Continuo No. 2 in C Major, BWV 1064R - Arr. Hogwood for 3 Violins: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018b00ca17c621d7ed7d24b76d4c74680240a0f987e0ec2ca4605e4442ca1624. 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/GBF079010462.
Concerto for 3 Harpsichords, Strings & Continuo No. 2 in C Major, BWV 1064R - Arr. Hogwood for 3 Violins: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e3df991f092f0b55143e4b7107274807a5d2f058fe170456860062f293ff6f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF079010463.
Concerto for 3 Harpsichords, Strings, and Continuo No. 2 in C, BWV 1064: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68a4dda9ae20d0103d6a1ba046ede1e9adcddd3a96cab440413c632ac3dfe5. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBF078911211.
Concerto for 3 Harpsichords, Strings, and Continuo No. 2 in C, BWV 1064: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddeeb102ebe0f15557c7daccf271e7c7e8cc1472f7e5cdf655147c1a80272b0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBF078911212.
Concerto for 3 Harpsichords, Strings, and Continuo No. 2 in C, BWV 1064: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea69dbd9dd15afb3132df3c2322bceedc646503c9d047b7f9a18451d348213. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF078911213.
Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fceb6833cc4f0b16bd585d8f4e94b7e77452dcad4d4319dcfe4ce7e683afd1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBF078911221.
Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 2. Alla siciliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd539e8dfbe2c15fa4dc75f188f541852bd230dac7943d2142f0db3637a07d. 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/GBF078911222.
Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2349c472149a5d6f55c6deb09c39c175236e4f077e4b9941aa0643b05bc97f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBF078911223.
Concerto for 4 Harpsichords, Strings, and Continuo in A minor, BWV 1065: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cd8abf7b72137b87eaba444c1e89d308d31e858669b30bacb13ebea598e26a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBF078011121.
Concerto for 4 Harpsichords, Strings, and Continuo in A minor, BWV 1065: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec9247e28341b8bbc7cd906b3b17893e1ab823cad556baa53b80ebd497adee. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBF078011122.
Concerto for 4 Harpsichords, Strings, and Continuo in A minor, BWV 1065: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d170203dd812583f4d2437f0351b9508244776af87c24be9a0d40b015e4741. 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/GBF078011123.
Bach: Violin and Clavier Sonatas BWV 1014, 1017 & 1016 (Mono Version)
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1950f4cc9b1460316df8628d6000444f573267ea9e425e73b0dde399d2f4665. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF077610492.
Bassoon Concerto in A Minor, RV 498 - Ed. Christopher Hogwood: 1. Allegro (ma molto moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dfa35c95d70443aff0aa0bc02dd1b65108625854def97b4206d5b08e18d478. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF077513001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1950f4cc9b1460316df8628d6000444f573267ea9e425e73b0dde399d2f4665. 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/GBF077610492.
Bassoon Concerto in A Minor, RV 498 - Ed.Christopher Hogwood: 2. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5bb407be28fa4c2bf4adb3a51a86fdcd9547665334fed1a155fcc81feb3b39. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF077513002.
Flute Concerto in C Minor, RV 441: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fb96445dae17d4d3f38c9f559f32098535f9b626ed6113b56aa462c5577293. 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/GBF077710442.
Concerto in F Major for 2 Oboes, Bassoon, 2 Horns & Violin, RV 574: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e494d9d0b0016965bbe239c4380e9ed0a3cfeb3fa72bd09dde7046cefc7c3c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF077610512.
Concerto in F Major for 2 Oboes, 2 Horns & Violin, RV 569: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e42f160a571a6396fa77eb06306da7cd7d04e6467786d5112a18504f422eef3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBF077510522.
Bassoon Concerto in A Minor, RV 498 - Ed. Christopher Hogwood: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef67b62e6695daed6c06991614681f0dbc58cb1d1a16b2d0732d9269b132553e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBF077513003.
Madrigals, Book 9: Non voglio amare, SV 172
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f3fb79c49fa45b93de3a0c800d7cc1d1e1e69dec2619a0534a717cb192f8c. 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/DEF057100590.
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 1. Largo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee649d668ddb351da17bf8ffe67204c47fd003f6d4aaeadb26a5eb2cb94bcd4e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBF077610491.
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 3. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde0c3a28e9b2cc5ed13870ab98184e6730f5c4e161aa25b0a4685bc2f8482e. 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/GBF077610493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fceb6833cc4f0b16bd585d8f4e94b7e77452dcad4d4319dcfe4ce7e683afd1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBF078911221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2349c472149a5d6f55c6deb09c39c175236e4f077e4b9941aa0643b05bc97f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBF078911223.
Flute Music of the 16th & 17th Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb75ca60570b733a19222774ecbb8cb7d2b97ed6b573cfef9326a51b2a30e79c. 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/GBAJY8929818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8efc0862feb93c962d101f579e2a2563161739a44b5c20c5e0ad32f97271ddd. 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/GBAJY8929819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcaf49016b30db446e1b7801e4f2ae4b172b05cf86063b8ea71c487cd93d110. 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/GBAJY8929820.