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 0x886ea7b4819e5bcf348f4e9fb2d60b368c62950499684a8f54fdf663fc9538d5. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9a8d915-95ac-4443-a4cd-2309bffb15b1.json and https://artists.proofprofile.net/proofs/artist/f9a8d915-95ac-4443-a4cd-2309bffb15b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Big Bang (Arr. for Vocal Ensemble by Manon Cousin, Elodie Pont & Michael McGlynn)
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 0x36b9949b4a48d9204d5f1b74f40624afd484d994856ad94d905718a43443dc1f. 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/FRU622372401.
Tunka Lowampi (Arr. for Vocal Ensemble by Elodie Pont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18868c32197ac6aa862fdf81404ff24439fc8af585c16a4e2c875ca6543039f8. 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/FRU622372402.
Waulking Song (Arr. for Vocal Ensemble by Pauline Langlois de Swarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194adb6f85fc874a70206d92e7af8ce7098044b947560801effa3a00ca6d48fe. 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/FRU622372403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1182c860424f4d7c1cae7be6653d5817e29c5dce216978a156aa906286534e5. 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/FRU622372404.
Ack Lova Gud (Arr. for Vocal Ensemble by Manon Cousin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae3ed4c08af526471c177313da2c35c67ce4b95d46460c125a1e0c46539e398. 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/FRU622372405.
Dahr Saelli (Arr. for Vocal Ensemble by Pauline Langlois de Swarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc921caa137c48f9362224ab5748e278530d3248642b3b073424e293cca533458. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRU622372406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850826274d842661ae3718786e3f1a2dd6590c174b7ad00beabc78b31c3ab92d. 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/FRU622372407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107f9942f3757a86914b495941ca5695ef0a68324ce8caa8bc8752ef24a411c. 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/FRU622372408.
Katell (Arr. for Vocal Ensemble by Elodie Pont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bee849bc6693877e39365578edaf4dfddd0842e17d3c7f20bf6e320e69e97e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRU622372409.
Mizu No Tsuki (Arr. for Vocal Ensemble by Elodie Pont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b091ff14c594f6f56c2d5fac5cc20bb856956184e82708e5c2c4a58426ded4. 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/FRU622372410.
C'est la petit' fille du prince (Arr. for Vocal Ensemble by Manon Cousin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb582c54946f5241f2b9d75ce7111b1dea7ff262e5b9f2937772987be0b1f7b06. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRU622372411.
Furu Ike Ya (Arr. for Vocal Ensemble by Elodie Pont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721d431f6d26e146620b0ee42bf6a97a9dffcba465d1aae884c3449f39344946. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRU622372412.
La Fille aux cheveux de lin (Arr. for Vocal Ensemble by Pauline Langlois de Swarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfe525c7d9dc47c7528ae10f9cae700974b44b4f999401dabcd1add685026e2. 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/FRU622372413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c749561665cde6e4d26e3d340b3d33bac721765b88befeaff20a7fef9cb29f3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRU622372414.
Uletay (Arr. for Vocal Ensemble by Manon Cousin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef514ab809a9e72cfa90321ac744e30cfa878c0a4400cca958ed65033e93c3. 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/FRU622372415.
Aestas (Arr. for Vocal Ensemble by Pauline Langlois de Swarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b155534487aff7f5c2faf98d241a1bc0f4f5791699c351309ebc39acec5b6a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRU622372416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623cee7f91ae298870fd9614f1b20d285a0a10bf88b2a4398200e88f06086aef. 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/FRU622372418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194adb6f85fc874a70206d92e7af8ce7098044b947560801effa3a00ca6d48fe. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRU622372403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850826274d842661ae3718786e3f1a2dd6590c174b7ad00beabc78b31c3ab92d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRU622372407.
Les Maîtres de l'Organetto Florentin au XIVe Siècle
Love, Revelry and the Dance in Mediæval Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05272c3446dde1a2dcf471879ecb5a39453bd81e9ae80ec2f087d8ee7aa022cc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BER180024301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e628f5f3a34497e711d4a05b68aae8bb87f9d494cbd176aff877513c463cfa5. 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/BER180024302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766abb805995a3980e5d112e53ae9ee034a1039a8038c27b9720ba2fb1a826e4. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BER180024303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6337c0b87cdc3f9f50f7342a5d25b6d34a2f457fa2d39fd59f0a27858319d538. 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/BER180121506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b0d18881cc3c8686cbf9ae44ca33c36d9fe254f0a900e21a603a7d38b417d. 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/BER180121512.