Huddersfield Choral Society is a choir based in Huddersfield, West Yorkshire, England. It was founded in 1836, and is recognised as one of Britain's leading choirs. Over the years, the choir has perf
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 0x44a54ce74af1b381c62e29971807494eaced8fa1c8f0e7c91425639ccc18eac5. 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/6d611dea-353c-459d-a5c9-939ab7845986.json and https://artists.proofprofile.net/proofs/artist/6d611dea-353c-459d-a5c9-939ab7845986.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f77ef2e82f8b2cf7cb277c7bfc98d86c51c93dcd7a94040d24906d5687aacde. 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/GBLLH1957201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446edf5650487dd4b33b8bf8f9863314c9b9225293bf082feb9eb452756d934a. 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/GBLLH1957203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e0aa1e27be33e59dab1cab718d07c3b2019c5ff27fa99a999a885a600dd1f4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLLH1957208.
Make Me a Channel of Your Peace (Arr. Betty Pulkingham)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2c3484e8db8b192e9353ca07e6a5624c0f090a78fa5b301d98d84879f65e0. 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/GBLLH1957209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bc4288d336a58c211630487884773cb652c59571645c8d9b052fa1b0c4201. 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/GBLLH1957210.
Good Christians All (Arr. Darius Battiwalla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade7cd6b141a0c5aedecf257b985c11191505c288d93b064f80da2904b4daeb1. 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/GBLLH1957213.
The God of Abraham Praise (Arr. Darius Battiwalla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4b6faf549322c58e62df11b055e989adc05fb5a735885098947f208be92950. 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/GBLLH1957214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40baaf6ccdccf466db7feb1c5edb25981c40af75bb2af1e4d73038ed62182756. 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/GBLLH1957216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef65453b11355269c7e2fc4ca5286de267073a125c1b503953632a664072d13c. 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/GBLLH1957221.
I am the Bread of Life (Arr. Betty Pulkingham)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930fbba5cc6ff036f8cd1c4add72707b99277a5da2c838bbf36b1fe6167b2de. 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/GBLLH1957222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cf5df086755fb0048e9a20a0d4cfa9023586f4a99ef2a6c637ab80c17aabfa. 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/GBLLH1957223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55407f1da1437e96b2d048e248884534f4fde0b2c4ce5d3f9393ae3c2dd82d76. 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/GBLLH1957224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae6f952171e929efc58c7e80a94797040180afe77a4738d89cb5bd2d83624d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBF076410530.
The Royal Liverpool Philharmonic Orchestra, The Huddersfield Choral Society, Sir Malcolm Sargent andMarjorie Thomas
Música Clásica 50 - Lo mejor de la Navidad: las piezas festivas más famosas de orquesta y coral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c03a1a87d2bc309f0c653a5d86861fabad98c3f90477f76e1e5e83c954d56. 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/GBG3H1211679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d315c61a01a70fb069045ce6e3e4ba17432eacf4f313a1463158ab6d7a2c03. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076441401.
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
Guide me, O thou great Jehovah (Cwm Rhondda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2d2ae7c80a298f7b99ed2f9244acf7d5df5df64fdf19278311163562f8e1c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076441405.