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 0xe909931da34b8fecc15c77752495c54b3086374243811af0724c75d73128b017. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b24acf7-ec81-43e9-98f4-f34399da8c60.json and https://artists.proofprofile.net/proofs/artist/9b24acf7-ec81-43e9-98f4-f34399da8c60.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Christus, S3/R478: Christmas Oratorio: Introduction
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 0x83028b4291e1e2d97b6339d7b114dee0936a1dba67b43e2c5530f9568f50d4ba. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251283101 — a six-check JSON result.
Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c188e8637a6aced2bf894141801ccf40a419e6493bae5c798c97318eb7320c7. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924005 — a six-check JSON result.
6 Minuets, WoO 10: No. 2 in G Major (version for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdeb0280ea0cb79e42d49702b9218503dbdee34882410551322fd5fd9f4747e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924010 — a six-check JSON result.
Don Pasquale: Act I Scene 2: Cavatina: Quel guardo il cavaliere (Norina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ca3145e58533814bdbe2d5514bf52d5397167f63989ba4b8d44cbd844c6202. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251241607 — a six-check JSON result.
Christus, S3/R478: Christmas Oratorio: Pastorale und Verkundigung des Engels (Pastorale and Herald Angel's Song) (Soprano, Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737d85b1e5711e601125cfd846ffa91340e6eab62ad176fbd62ca445ba5a575. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251283102 — a six-check JSON result.
Christus, S3/R478: Christmas Oratorio: Stabat Mater speciosa (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307224f04ba9ead3d32bc525a78f3a272a58a8124e3b9abed2027a9340ce7ee. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251283103 — a six-check JSON result.
Christus, S3/R478: Christmas Oratorio: Die heiligen drei Konige (March of the Three Magi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7795822b9845a8d0350ab7f316f04bf03d19959360525152c9444cad6949d68. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251283105 — a six-check JSON result.
The Damnation of Faust, Op. 24, Part II: VII. Dance of the Sylphides
Classical Music for Learning: Great Masterpieces to Improve Studying and Mental Focus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e4ddf93278f4b99664296551e4b213161cf1bbea216f2095c9d4af83d8f5f6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US5541301600 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3812ef2206507ce45d4f1b39a3d87221613381530739b619d11fe6eb7bb79. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM18800604 — a six-check JSON result.
Violin Concerto in D Major, Op. 61: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab026026fd285de44d755542c0df59fe429118c782da07ec4fcfc49164ff15. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924006 — a six-check JSON result.
Violin Concerto in D Major, Op. 61: III. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180773974904836fe015ac9d136ec182c37c2b0b2396c4c8676413101a2b0ae2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af5149d05d07a6ba97fe42dbcc6d673fb035d6d2e94fa43e175cc723b03c16. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924008 — a six-check JSON result.
Violinromanze Nr. 2 F-Dur, Op. 50: Romance No. 2 in F Major, Op. 50
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f4cf10f9343bbc1738db1f2f4ded6085e29cae90b6081197f7ebb133be4fb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0924009 — a six-check JSON result.