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 0x54dbd15aeb91a4464f137d23e2e5e5cc5a8dcd492a4dbbc5d76bbd00956822e0. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ad72620-742d-4d84-91e5-02058d481c7c.json and https://artists.proofprofile.net/proofs/artist/1ad72620-742d-4d84-91e5-02058d481c7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Marriage of England & Burgundy: Music for a 15th-Century State Occasion
Busnois: Missa L'homme armé – Domarto: Missa Spiritus almus – Pullois: Flos de spina
Dufay: Missa Puisque je vis & Other Works
Music for Henry V & the House of Lancaster
Music for the 100 Years' War (1337-1453)
The Lily & the Rose: Adoration of the Virgin – Late Medieval English Music
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 0xf6cc89e3ad1dbada0fccf06cb98dd2bc3b9af12aa93c660fe4034c0aea06e993. 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/GBAJY1822801.
Music for St Katherine of Alexandria: 15th-Century English Music
Missa Scaramella (Reconstr. Fitch): Ic. Kyrie II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fe40a39eeea38b69ef4d27e5cfffe86e26a879be163d426a914e5fb9db189. 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/GBAJY2446005.
Missa Scaramella (Reconstr. Fitch): IIb. Qui tollis peccata mundi, miserere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a48ceaa3a9fc7ef1bf9af655a632c9385e064d44c2a72a638702e3b0fca86c. 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/GBAJY2446007.
Philippe, qui videt me (Reconstr. Weller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e7016a87d19cb626570e5aba994cf613d29c6485214c2e6f6eaab372484a5. 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/GBAJY2446001.
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 0xdacf7b5a59809dfca6b15f34228352c51702b53d2eb02082979d9003e7a8e648. 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/GBAJY2446002.
Missa Scaramella (Reconstr. Fitch): Ia. Kyrie I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e309785b55f504155bf00382b9b428ff21c07ab37c9c037d9fc4907f42133e0. 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/GBAJY2446003.
Missa Scaramella (Reconstr. Fitch): Ib. Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cf2d6c96eef82f1b1e88ca5969b4b478963b5cf263a37cc26eb026acf02c0c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJY2446004.
Missa Scaramella (Reconstr. Fitch): IIa. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e15b75898c5dabe1664ab5d4f20ef1b649a7a383d397fb08596b91efd35086. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBAJY2446006.
Missa Scaramella (Reconstr. Fitch): IIIa. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd1c4335f59bbc35b457ac4c1f8c0ae275ce90e94998bcdc07616bf2e822c5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBAJY2446008.