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 0x033c4971aa48a309d663453f6e6b45106871164bbcc9aa05bcc9093159ab3429. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/690d5844-c2fa-4eff-bf91-2d3eb44b02f3.json and https://artists.proofprofile.net/proofs/artist/690d5844-c2fa-4eff-bf91-2d3eb44b02f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata in G Major, Kk. 427 (Arr. for Accordion by Philippe Thuriot)
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 0xe3df65e2669766d5d026a2fc1d3a4a757934f7005bc65c673c82fde04896c452. 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/NLB152400515.
Sonata in A Major, Kk. 39 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42f562c1d6fe7fd4427032962ee329c5c30dbd5a203a475c55878385551657. 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/NLB152400518.
Sonata in A Major, Kk. 208/ Kk. 533 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77faf1c99aed93ac2a7d58b593f0edcb4d6df700372f6bfb71bb6d3ad8ac13c5. 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/NLB152400519.
Sonata in D Minor, Kk. 31 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78be86c188e1a62dfd34f5c9287241da00770f2f0d220b6f4487364840a326. 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/NLB152400520.
Sonata in D Minor, Kk. 9 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c1b95d73f25e9141e13dfe3b269e39f5232dfe41329ee63c63a35331d39a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLB152400522.
Sonata in D Major, Kk. 435 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4882e67e65568ce85e9c3da23841da2016cb7c95c67907fe6585b339636a5724. 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/NLB152400523.
Sonata in D Minor, Kk. 141 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32616353ce3d29f7db28875ece42823f9f1837c3415c2dad0aadd9cb8fdd2aeb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLB152400525.
Sonata in E Major, Kk. 531 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ccb09526262f38d25ae7d63b17472225616e52ec365de1cdc7809b5aa38843. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NLB152400513.
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
Sonata in E Minor, Kk. 98 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d272c6dc1a7690f6fd13309498f9fffa41a03b8e6b3ab0acf6def9ca7d6b1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLB152400514.
Sonata in G Minor, Kk. 8: I. Sarabande (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037e483ef6b98939c84c4123a68a11c3eea5e801727b664f3df42c90022aae2. 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/NLB152400516.
Sonata in G Minor, Kk. 35 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb727045d4c85bbcef5ae105dc537feb31534891eaf2e335fd0902d9dfc6d9. 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/NLB152400517.
Sonata in D Minor, Kk. 34 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c85b04d02cf6ab129fdb87a3b89aef167753be8d844558112b79bc1f361941. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLB152400521.
Sonata in E Major, Kk. 380 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a1256344148f315d583de7fcf52fd83583260fb2e3813bcd901b557a633a4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLB152400524.
Sonata in B Minor, Kk. 87 (Arr. for Accordion by Philippe Thuriot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6d27dac63406fa78a3a7ad316e616eb4863e22ba9ea0ea1c2633250951716. 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/NLB152400526.