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 0x75791392732a82aef2c7be68034ba67cd8bc0b50ffe2d92c30d55797c7ac5a51. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e45e944-0b39-49d3-987e-9765d1662e28.json and https://artists.proofprofile.net/proofs/artist/8e45e944-0b39-49d3-987e-9765d1662e28.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 0xb1721ea12899671ab3c39668769af13ece4614fc4d5691c38f388b88c20ad033. 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/FR9W12405927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1d968a153c1569ac98e20f8c2cc370d0acafe091e9e1f7586636a84617d822. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYC1302438.
Piazzolla: Histoire du tango: II. Café 1930
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76805ba88f09710696a8b35d4fd98d5cc0d003468baadc7b2e10e6209dd9da57. 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/GBAYC1302428.
Piazzolla: Histoire du tango: I. Bordel 1900
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c0d49523c2ca758b9b4e0ea80289f0150c4e4af43134fd96c3a5ef46bab73. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC1302427.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 1, Jocul cu bâtă
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55eb25d785089d01e39c86d75c2b098bb20bce07e765090f86b4a2a4f02ba8a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC1302375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c0d49523c2ca758b9b4e0ea80289f0150c4e4af43134fd96c3a5ef46bab73. 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/GBAYC1302427.
Handel: Recorder Sonata in G Minor, Op. 1 No. 2, HWV 360: III. Adagio (Version for Flute and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344b892a50faf23b56a8aba60a88ca81835ab918ffa41fa0602e13291a2e75f. 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/GBAYC1302391.
Shankar: L' Aube Enchantée - based on the Raga "todi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3cf46a3e95ff4a217d19cf11ed0de30850bb99106e334bcc8853786de48a1. 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/GBAYC1302381.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 6, Măruntel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc62f78ecd8c93f63a7d0ae5efca7633e96e0f2c3ce79def3ae6381a7c0010a. 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/GBAYC1302380.
Hosokawa: 2 Japanese Folksongs: II. Itsuki no komori uta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a274563a73ae3ffb7873058c8634fbb72c13edfc1e5d65f6497e8a409d6421. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBAYC1302395.
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 0xb72d7b16a71a7f939ca7a10c6140f3c88d814558b487089d90476af01df77861. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC1302439.
Piazzolla: Histoire du tango: III. Night-Club 1960
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484f6b84ca91ab7c57317618252b03c9c382cca354cfa1cc355e707d42574c28. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC1302429.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 3, Pê-loc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03d61a08293014a96351eac791e54b393fda676041f7e9d4b1ae9914898777. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBAYC1302377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b54411589285d3af0035748c9de9c52db1b2b4a8a4ecbde59cdeaaacbb8fc86. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYC1302387.
Handel: Recorder Sonata in G Minor, Op. 1 No. 2, HWV 360: I. Larghetto (Version for Flute and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b3ecd6a1b4bf20978afe38df079d0fc12751f0d2b00ffe460d69cf3607decb. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBAYC1302389.
Piazzolla: Histoire du tango: IV. Concert d'aujourd'hui 1990
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352734f7b0719267e7a36f9486d8debcc3a2115f149f95f2a09b37b8c24e7b61. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC1302430.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 2, Brâul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8000b30f83359f3b77b5079940a6dabc18540d833ea2a474ed06cbaa73ca94d8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBAYC1302376.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 4, Buciumeana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eb4091c83e63ef82cdfa71872b90f7b6f867988d02a74e5a8950f59f18ab0f. 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/GBAYC1302378.
Bartók / Arr. Levering for Flute and Guitar: 6 Romanian Folk Dances, Sz. 56: No. 5, Poarga românească
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b1a1889e3e20d19404fd087fd0ae17337061f8ad4d63ed714ffcc07448d105. 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/GBAYC1302379.
Handel: Recorder Sonata in G Minor, Op. 1 No. 2, HWV 360: II. Andante (Version for Flute and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd828edee6fe369a498cd6cbbe278802331c368cbe2179bcfa445e40fd7198320. 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/GBAYC1302390.