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 0xaf1802b17b10bca28fa7782b3424d402fa623beb2dad31838626e59073c850f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc06bbd0-6ad4-49a7-9a4e-ddc294cff43a.json and https://artists.proofprofile.net/proofs/artist/cc06bbd0-6ad4-49a7-9a4e-ddc294cff43a.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 0xba02deef1f0f7f0d6620c67b1a884f898a53ac09e942280458178ad680cd9c3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBF077210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bd91c1985cf1e518c116624f474d4e18c8474d8f64f23d85db839e7e0edea7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBF077210004.
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 953536 (2026-06-13T17:25:41Z), 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/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 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/GBF077610492.
Flute Concerto in C Minor, RV 441: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fb96445dae17d4d3f38c9f559f32098535f9b626ed6113b56aa462c5577293. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF077710442.
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 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/GBF077610493.
Concerto grosso in C, HWV 318 "Alexander's Feast": 1. Allegro
Handel: Oboe Concertos Nos.1-3/Concerto Grosso "Alexander's Feast" etc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feb4131f3d5401c5cbf64f062d4af22a6a3147d62010ff4e7628218b4a67793. 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/NLA507100308.
So You Think You Don't Like Classical Music? Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba02deef1f0f7f0d6620c67b1a884f898a53ac09e942280458178ad680cd9c3b. 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/GBF077210001.
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.
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
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.
Concerto grosso in C, HWV 318 "Alexander's Feast": 2. Largo - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe6317e866d52d1f1fbc3482b64d1349d069da2787e7245acf78ad5360e3b5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA507100309.
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 grosso in C, HWV 318 "Alexander's Feast": 3. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141ac450838db13474bca985b59252a76a09952168efcd899590161a58d4a61. 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/NLA507100310.
Concerto grosso in C, HWV 318 "Alexander's Feast": 4. Andante non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc12c7537e641a443e30ba061eb607bc43ea01939d54467b7295ec883f2d27b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLA507100311.