thumb|View of the choir and organ in St. George's Chapel, Windsor Castle, where "Doc" Harris served as organist and choirmaster Sir William Henry Harris (28 March 1883 – 6 September 1973) was an Engl
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 0x13e83ef7bf4e666a2d0a9e982a5151c2b751e9be8bd5687ee880f30e4302d98d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/593588c2-c1af-4dcb-a7b5-9d0da32b2eb9.json and https://artists.proofprofile.net/proofs/artist/593588c2-c1af-4dcb-a7b5-9d0da32b2eb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x10286c73cd7c6c044b57bc0de44ead9e290b2ef1710d5cbf8b469d60c0d38420. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI190246413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62454349325df656c8c084035ee7fe10b22a82dda490a7ec0260b8280e3865ab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190246414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529dd837d3f386349ef357ee80642d656259a883797fce42924d752f44554ff3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH0608503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a947ffb6a2a5723b31a20058e19e53a3c70eeb4646eb4992793a4fa9d651cb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH0608507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4ef53d152f7aae82f625658e1312f0d8f0175d0b6e14a1feae16dcd310ccbb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLLH0608508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54d2f761cbfe99165a92578acb550060445c67c3bbd46f4d83c9a56cc56003. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH0608510.
This is the Day: Music on Royal Occasions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b8f6e07b1e74d87c3c6c7b9bbb9ee7fcfd29b57664dbe30cd2c111fd9a4be. 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/GBAKR1213601.
Vesperae solennes de confessore, K. 339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94c603a35ca622e625eaf02c9a8a949dc2bb5fefe1f280c8f03b00437b032ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAKR1213602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c49080c40083e3170b905fb2d421b264a1413b7e1dbef6b1470c47f2c488b57. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR1213607.
Londonderry Air (arr. J. Rutter): Londonderry Air: I Would be True (arr. J. Rutter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c327a5343dc8715c3dc2362170c20aa6d215b5a5cedf2c05d167c88cc6d522. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR1213614.
Henry V: Henry V: Touch her soft lips and part
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f99e8e895a4a1d5b6a0c8435dc5946e276906f6d4ef28f6221ab977ef98cb3c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR1213615.
An Oxford Evensong (Featuring University Composers)
Pater Noster: A Choral Reflection on the Lord's Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4858d1971f52df66ad414586da13d4afd85d933c9a3c2a9ccef973a69e27c9a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI191245401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7821d58f741228fa2f516f7cd4a1ac361f02793d517ad86021cfc90ca2415. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191245416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea8e39c179a4816f6edb535c372332108f5a1b1ee56d77437604adecd680cf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191245418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503bdc2a149617a664cba650a753af483a56b90a67f5fb1ff6f4399ab5652f6. 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/HKI191245419.
Music for the Coronation of Her Majesty Queen Elizabeth II
Alpha Collection, Vol. 13: Evensong from Exeter Cathedral
The Call - More Choral Classics from St John's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab00ba5b851cf4a2ee1f694193b0c52d7c27de8a296a6d8fc1ee63486ac111. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190235506.
Howells: Magnificat Nunc Dimittis Benedictus - Britten: Te Deum - Gibbons: O Clap Your Hands
Songs of Farewell: My Soul, There is a Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729e9faab54ca63b2e3206ae52275a4f910576757a1a85a4d2356bae6421f2d3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1126705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864ecdd53bb9ef76244ded3e45f83bb873e7da16aa8173cd8b6d5a70fd1cd0e. 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/GBLLH1126712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a181b04e68f7943478ad8686164b99138b6a079d2ca54436744483add87212. 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/AUAB01250540.
Organ Recital: Elliott, Richard - Bach, J.S. / Elgar, E. / Karg-Elert, S. / Schreiner, A. / Durufle, M. / Wood, D. (Organ of the Mormon Tabernacle)
The Very Best of Church Organ Music (Volume 1)
The Complete Psalms of David, Series 2 Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3df9f5bd8642f4299eb5a6088521bc0ab6f4d7e9bf1b521cd2def16f111b4e2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2412012.
Faire Is the Heaven: Music Of the English Church