Franz Xaver Gruber (25 November 1787 – 7 June 1863) was an Austrian primary school teacher, church organist and composer in the village of Arnsdorf, who is best known for composing the music to "Still
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 0x9d24aa089f1c946ef9f155b0435cb94441bbacbb21e8d76a9c72fad6e5d936ec. 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/2092745a-2ac2-4a6b-931c-d6644a3da740.json and https://artists.proofprofile.net/proofs/artist/2092745a-2ac2-4a6b-931c-d6644a3da740.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Yulefest! - Christmas Music & Carols from Trinity College Cambridge
Noche de Paz (Arr. for Choir by James Burton)
How Can I Keep from Singing? (with Dame Judi Dench) (Arr. by Ian Tilley & Fiona Pears)
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 0x3f91691bcd7de2401a1b63f9fe770f4bfbae5c56ecb37bee4d05643c6f8d9f5d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB5KW2002894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51da4adcc10838a5984257c81c6fa7fb1e431fa4e934c04376601360172ba3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB5KW2002896.
Bless This House (with Susan Boyle) (Arr. by Simon Lole)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a1c63a0ef0338895435fe71ed4c996f8b23988be4dd49a60ddbf3474131d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5KW2002897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327dca444b299bd9119b68ccc181b094279754930669d0b1998149b60463340d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:36Z), 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/GB5KW2002905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c773a01b318620ec0a63f33c8527bf527b88af0def6876d5b26bc269cf18f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:52Z), 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/GB5KW2002907.
Silent Night (Arr. for String Ensemble by Vivan & Ketan Bhatti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555603d995cf9b956c85de29b07bc2bccb31af2b4d9942e777f9244d0380c193. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE862301605.
O Holy Night (Cantique de Noel) - Orchestral Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683de3ecdf934c28b233a9fcc759e36234ac7e3213984642c33ad372c03d0aa5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM11105286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885e82a47f0452d0c188e961fbd2c86e8480f1cae1cf76389eefcf5c1666c30a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF071502910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65709ef462992b3503dc23b8e20cf11454c51081fc25fcdc90dc62509817f97f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM19915081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab9baa257e0ec93be8707d25f3cf816082620d71ccaa708f6ee5b6715d05fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEC171700238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a0aa81528cf5997ee820f265ab0c2beb92e18a2d304acc151345486da002e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM12006143.