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 0xc5748e96d9eec4a4e92b99db1070de1b96da95769537f96d41fc077b49bee574. 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/a18a95ca-9d6d-4364-b7cb-e1a60bcb00c5.json and https://artists.proofprofile.net/proofs/artist/a18a95ca-9d6d-4364-b7cb-e1a60bcb00c5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Phantom Of The Opera Original London Cast
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 0x600e346191e8de3ef19125ebbdb18b6d02884d699c4ff5434d1cbbde24b56566. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBALG8700010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f87a8b720e57caf33ca4f978eef2f6d45167a4802889cfa8cce3e7ed38d73. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBALG8700018 — a six-check JSON result.
The Music Of The Night - The Phantom Of The Opera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa426e45d64155f1e33768debfac23792f8adba481978d7a953c804fc04da0de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAR29601021 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fec3a51b758cd83da71a20e93e012f30317f47532cc594bf6ebe93ae35b4911. 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/GBALG9400038 — a six-check JSON result.
Music Of The Night From "Phantom Of The Opera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e73a1ebf4bbd4aa16f58e897bac2264597ae1cfb844a9ae54feb1cf936db953. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ZAA041100192 — a six-check JSON result.
The Last Long Mile (Plattsburg Marching Song)
Old Trench Songs the Great War Music & Marches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dc793aea7fc023bbca0526b56ff0e4c09acd1375e5dc0dfd17940fd411a309. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEU2065882 — a six-check JSON result.
The Music of the Night (From "The Phantom of the Opera")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1efd3fbe4770a2af4c4437ec13cae7a5434d5fa77126685d657f67ac6cb90. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB01550656 — a six-check JSON result.
Overture (From "The Phantom of the Opera")
A Collection of Broadway & American Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475731ba38043bbf9304e368a5aff9a078085cbfc8a6c1bda6ceb2f019144123. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMLY81800001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c7aa9a74eb787a1884b31b52a73738b7b8397d0ce6ee4c688ffd228dc7d0f. 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/QMLY81800002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa426e45d64155f1e33768debfac23792f8adba481978d7a953c804fc04da0de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USAR29601021 — a six-check JSON result.
All I Ask Of You - From "Phantom of the Opera"
Royal Philharmonic Orchestra;David Arnold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d351e800b535038fe7526bd9b3e1ac9110407b49d30c84e1c7aac6520213ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBGRH0900047 — a six-check JSON result.
Wishing You Were Somehow Here Again - from "Phantom of the Opera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd51971b1b17416afa9b3d87df086b2f85a77919903e1849c7d4d6cf2ffd1e58. 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/AUBM01100473 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc597517bf2faf57965f28dbeb2744b16ca8bbbd99377acf143c627869671d0f7. 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/USB4U0850668 — a six-check JSON result.