Sir David Valentine Willcocks, (30 December 1919 – 17 September 2015) was a British choral conductor, organist, composer and music administrator. He was particularly well known for his association w
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 0x4f01183038a8d753feb2091c4a117d03e8c74c193292f870dd3058ce6d06aaec. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99e820d6-6289-4752-b5b4-4f173416952b.json and https://artists.proofprofile.net/proofs/artist/99e820d6-6289-4752-b5b4-4f173416952b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hymns, Songs & Easter Matins from King’s College
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 0xec4829f286d138e9cf39f6661bc937d696c61fbf2a2949392ad6ecf7f3944153. 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/USX761940001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209176ded172b8b4c8415568d2d77375c355568c4cbe7cafbed06784f192dfd. 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/USX761940013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415da27201363a3f97adc9f4ba9a081efdf004f8af9fec7d4195cd3fa0e8f0a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBC7N1347901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed6dbd2ca1745a82844b0477b0ad92525aa3f4a9d24856a1b4662aa8013894. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBC7N1347907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a5db717734eedefa30640c378d788ae8e2a3577319c355842af12b5d7cf58d. 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/GBC7N1347908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47983f9df59ea8ff3076f8e30ab7c56a59bf55f1f7749ada5cf2c9b6cff2f892. 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/GBC7N1347909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a38eb8150bd904abb79ee79a767e134b92f2178fd3e40a7e35ecddc5fe2e71b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBC7N1347910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4412002785c56022a1887713543e916b12d0c436dff10554b3f31a45297768b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBC7N1347911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503f3eebcc19a8469ec01a4f47b24633b2d1382122484796504172b80a3fa0a6. 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/GBC7N1347912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd4e357c42eebb50bb29e3e443fe11e5798a4b234d97144d2145c14fa428bcd. 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/GBC7N1347914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca8026d8ead1920a8d3ed534086cdb32d6c05ce2eff02587ce2950b0d8380b8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBC7N1347916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c72368b8550517dc873859c2f0f7fed9ed29bf78e8eebace44351469daa428f. 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/GBC7N1347920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe689f4fb85fc563ddd9c8a8cb933076d632b0e08a402afcde3142af1c8c45485. 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/GBC7N1347922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15ec55b4340a238a86e5d3fd5cdf3d72aef5648b05288dbe9df64f5c178e3d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBC7N1347924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcd1691452b00fd3c8085f913a39bbe0e4f0979a42ace1677f080b0958fff52. 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/USX761219005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11177df7fde9981e05ef44e90c303d741feed5d58a95ccb388d8af159c0afa. 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/USX761219007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b438e91b191094445663b60f225e596da56e705c5eb23b9245926f514fc8b1d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX761219009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed6f63ee56abf320c6f01b2ec8fb7de61074048c99a05788c746be038d712d8. 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/USX761219018.
Haydn 'Nelson' Mass; Croft Burial Service