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 0xda2d45411b289aebc732f42cd6355f7acbcedfff3d1df9b8e555f8dca88f6e7e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e422811e-cf9c-4bcd-8543-f6a17b9a8dc7.json and https://artists.proofprofile.net/proofs/artist/e422811e-cf9c-4bcd-8543-f6a17b9a8dc7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: La Forza del Destino - The Sony Opera House
La Forza del Destino: Buona notte, mia figlia
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 0x44a55f5cd695997e0a4dcefd6607ebdcebc20dd8cc72fabc879edd6ec917256d. 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/USBC17600196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7ccf7cd6be768e002aea243ef2db3b97bd431c81d5126127b1a0838b78c3e9. 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/USBC17600197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b1437e73d404ec57eefa06dcf81936c380bce03746faf816d00e061668c585. 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/USBC17600201.
La Forza del Destino: Madre, Madre, pietosa Vergine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1317d53b04255e79183d546e537552f4df4784fec055e9956c9bd6865d57ca51. 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/USBC17600211.
Palestrina: Missa 'Sine Nomine'; Missa Ecce Ego Joannes
The Choir of the Carmelite Priory London
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac404153c987554bbb0f2e6ee2139f8f532949fcfcbf2296e7f9481839368ad5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:48:06Z), 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/GBF076311364.
Purcell: Anthems and Church Music (Recorded Under the Auspices of the British Council) [Remastered]
Handel: "Utrecht" Te Deum & Jubilate; Zadok the Priest
Richard Strauss: Les grands opéras - La discothèque idéale de Diapason, Vol. 7
John Gay's "The Beggar's Opera" (Overture and Music Harmonized by Johann Christoph Pepusch) [Ed. Denis Stevens]
Berlioz: L'Enfance du Christ; La Mort de Cléopâtre; La Mort d'Ophélie etc
The Cries of London and Music in Honor of Queen Elizabeth I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b63fb6efe681eafc6a9a14eb4f411f01d3a0453fe1f9ac32e8ee5292175d26. 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/USX762290707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f280a6c27e8b73adb43faf7e13a0ee9617e792aa73c99864e30448db3468ca. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USX762290704.
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
The History of European Music - Part One: Music of the Early Middle Ages, Vol. 1 (2023 Remastered Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627bb7f5172a3831a0702eff1112755cef0a8ae493a440a0150f8461669af75. 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/DEF057502600.
MONTEVERDI: Vespers of 1610 (+ 6 extra works)
I've Got a Little List from "The Mikado"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e98daf79a8242c40dffbbfc341a856218bd08d66ff69d8ffabbc36ab9e898e. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USRDG0211554.
I'm Called Little Buttercup from "H. M. S. Pinafore"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef92a090f52c57f9da49e2bc5151ecd7aa40c371cbe7dbba15efe673db749a. 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/USRDG0211570.
Zigeunerliebe Walzer aus "Zigeunerliebe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc686ce3596cb4ab99ac3298aff9a15a747b3e921e1bc8a6362983d9bb2a8b38a. 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/USRDG0111006.
A Policeman's Lot Is Not a Happy One from "The Pirates of Penzance"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0e29ed9648c9c407bba5be52c210bc203fe44e88dee6e58c48e6ad26984cd2. 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/USRDG0211567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf718c08e9e0cb68ff758de63de91c2995d075811a0b11d7add46f363039c476. 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/GBF076312782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518dd9323edc5e3a822f56d151e93204160281454376ca130a15397fe565424. 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/GBF076312783.
Gilbert and Sullivan: The Pirates of Penzance - The Gondoliers
Classical Favorites (Composed By: George Frideric Handel)
Gilbert and Sullivan: Patience - H.M.S. Pinafore
Richard Strauss: Capriccio, Op. 85 (Mono Version)
Berlioz: L'enfance du Christ (Stereo Version)