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 0x0c02dbcac7f5ac9ee47f84778a548644b45b0db6b9303c7f0e4657193f54322b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64a20ecf-def2-4019-bfb3-beea4656fe10.json and https://artists.proofprofile.net/proofs/artist/64a20ecf-def2-4019-bfb3-beea4656fe10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
An English Requiem: V. Ye now are sorrowful - Version with Piano Duo Accompaniment
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 0x184c03fb42e7949005590a0af62615d22af7a778ac23ecd163f378714eebc7fd. 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/GBEBL1719505.
Two Vocal Duets: I. No. 1, The Last Invocation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18aab12757ce82f7840f9aaf3eafd54a12b7ed976fabd847c66859f8ed29d59. 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/GBSMP1600033.
L’Allegro, il Penseroso ed il Moderato, HWV 55: As Steals The Morn
'Where'er You Walk': Arias For Handel's Favourite Tenor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30e0defda3962ea245cb9a1b52bfb27c616edfb5a2f09bd3eef8018d2604ac. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBLLH1645710.
Serse, HWV 40, Act I: Recitativo. Arsamene (Romilda, Arsamene, Atalanta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca29fa310dd85248f943f7f89ca0873ac196e2f91736deaeeb9f481ffb4d218c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBASH2370911.
Serse, HWV 40, Act I: Aria. Sì, sì, mio ben (Atalanta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cc2dd4aaa7285b78e2ff952b82d9f7409aae96289f5460214e525e44adc0af. 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/GBASH2370912.