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 0x0201d1f10b0e12ccd63f18123ad34fa12a27fe9f9e2b9f35a793118d1f00d196. 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/2684b25b-2500-4c79-818f-3bddf7cf015a.json and https://artists.proofprofile.net/proofs/artist/2684b25b-2500-4c79-818f-3bddf7cf015a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Georges Enesco au Conservatoire de Paris (1895-1899)
Elgar: Salut d'amour, Op. 12 (Version for Cello and Piano)
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 0x0e73624f82b41f80e4c8e65ecb0b7295cfbedbe07dfc079b17e0cafb89f688d1. 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/GBAYC1302832.
10 Pièces de genre, Op. 10: No. 5, Mélodie-Elégie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd49b5a6b6f7b33d71877b7914566c5654a7ad4b9ad6ceddc1703e8ac1103b0. 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/GBAYC1302842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3d24377844af9b1e0f93cc770da1c6981a28627ee18306f366201b3a7892cb. 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/GBAYC1302843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3d24377844af9b1e0f93cc770da1c6981a28627ee18306f366201b3a7892cb. 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/GBAYC1302843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f326a407b4869cf6b17ad3a87cff96c9054cf16f940c8d9471c9afa19cb1c5. 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/GBAYC1302831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e73624f82b41f80e4c8e65ecb0b7295cfbedbe07dfc079b17e0cafb89f688d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAYC1302832.
Paganini: Sonata a preghiera, MS 23 "Mosè Fantasia" (Version for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e67ddbfbd0c4325c506571c142ef9e82ce4ca083305fc8866e0e106f392929f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAYC1302833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56d54e7762f5b0fb7be28593ced40591e4799efcf9c22fdbabd8099658705e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC1302834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a707bb88dff4c1c8d6d4ad0ff4787e68adbbcb473d14f7452a6c4ef83cf70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYC1302835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af014ee89e0ce3e6a9b211a5f6ab4bf7edecd5c55b12651c1b9fb8641f2ba34. 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/GBAYC1302836.
Poulenc: Les chemins de l'amour, FP 106 (Trancr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca613aad91e461d9351b496eb2e9e10d060cf6b82fbbd879c32dbedb1d80f07e. 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/GBAYC1302838.
Saint-Saëns: Mon coeur s'ouvre à ta voix from "Samson et Dalila"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e74df7b73bbb6fde6e64805aae57911d5cd32e16cdf60527cd0664564a4ea11. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYC1302839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd920920b93260d441fcf4bedc8fbdaeaef4f11b8acae0a946acb5599f955b058. 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/GBAYC1302840.
Tchaikovsky: 6 Pieces, Op. 51: No. 6, Valse sentimentale (Arr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2605643bea65934300fbc62286207a5bfe59acaf1a74a11d1f922173e9ae59bc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC1302841.