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 0x91746d4f4529a9209eacf484d46f59c97de7e9561e1dd8c08976a8576f0c293c. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15492234-46cd-46e9-86ab-1bba7bfcdd3b.json and https://artists.proofprofile.net/proofs/artist/15492234-46cd-46e9-86ab-1bba7bfcdd3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Quatre Motets sur des thèmes grégoriens pour choeur a cappella, Op. 10: I. Ubi caritas
Messe “Cum Jubilo” pour choeur de barytons et orgue, Op. 11: II. Gloria
Quatre Motets sur des thèmes grégoriens pour choeur a cappella, Op.10: I. Ubi caritas
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 0x39745f39162e4d5484f385fa28456369cfb7eaca8d69bbd03c6f537a011aa924. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLLH1957106.
Quatre Motets sur des thèmes grégoriens pour choeur a cappella, Op. 10: III. Tu es petrus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab177297e4401d2dd0ce89ad87a935dc6491a857519a48447ee8ff35b37b050a. 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/GBLLH1957108.
Requiem pour soli, choeurs et orgue, Op. 9: I. Introit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcaa8f7fb526d6cad974a0ef67bea6ab3c3fc937771182e1c5f4a6f25ff03e9. 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/GBLLH1957111.
Requiem pour soli, choeurs et orgue, Op. 9: II. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115e5ed67005b965b474bb75acc37f65125d84b2f16d4d1a71beeb5cac1d2d19. 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/GBLLH1957112.
Requiem pour soli, choeurs et orgue, Op. 9: VII. Lux aeterna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352bb5bdf5fa8f35f99fba68bf70eaa4507845f27f18941e143b08117991e518. 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/GBLLH1957117.
Requiem pour soli, choeurs et orgue, Op. 9: VIII. Libera me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8488b5ce6f06a1319e765700b52aed631044a4795efe36060e2cc8166f475. 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/GBLLH1957118.
Messe “Cum Jubilo” pour choeur de barytons et orgue, Op. 11: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0be1399e600268e963bbc40a0e5a709ecfc907ccc9e1e95b6ba967dfa1a05. 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/GBLLH1957101.
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 0x8b403693632d1ec18e9a1097cfeda746150c024a9564b0d55071564569e06410. 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/GBLLH1957102.
Quatre Motets sur des thèmes grégoriens pour choeur a cappella, Op. 10: II. Tota pulchra es
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca74f93815c5c60f9fcc6a7f5b834d65b5474abb600ccbdf6adff1bcf528916. 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/GBLLH1957107.
Quatre Motets sur des thèmes grégoriens pour choeur a cappella, Op. 10: IV. Tantum ergo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc064a3ee828bd1547a24c126aa10ac1c8c9a06c79ab3dc1d51dad475ca7d034d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLLH1957109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427012c3903f5442d4fe253f9012a5eea63afc2c75ed6e6131452d6d5c4cec78. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBLLH1957110.
Requiem pour soli, choeurs et orgue, Op. 9: III. Domine Jesu Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d0f225c4a970d414fd6dbf16e2961d9c19d8eb7eedc0854c37a77c80e03e7b. 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/GBLLH1957113.
Requiem pour soli, choeurs et orgue, Op. 9: IV. Sanctus & Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdc7c8bcdec8a61c30dd15ec3329a8144b3368bf326ae2f3c20ce37e90faed. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/GBLLH1957114.
Requiem pour soli, choeurs et orgue, Op. 9: VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac70e5c4870e33837813dd4d2527dd4fa5197370174b0668abbdecd84a7d07c. 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/GBLLH1957116.