William Douglas Burr Knox (born 14 January 1986) is a British singer and songwriter based in Haarlem, Netherlands. Besides his own repertoire, he is known for his work with, among others, Duncan Laure
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 0x56db36b2bc66f731b15f03ea8884de2c2d34f73285216f2e338fcd8fc2da65f7. 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/3232e463-e69b-400e-bf49-5887d07dc06d.json and https://artists.proofprofile.net/proofs/artist/3232e463-e69b-400e-bf49-5887d07dc06d.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 0x5fdb6c96c0f0129e399a6997890862d072eab22a6b7720b2ea082d5b28cb27ed. 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/DGA082399669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0d92c05717e6b59c291a064babba5d4c621b878f50f4ef25fb400560ef27c7. 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/DGA082399670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b0b451bce5853f1bde3c405113e4caf90f9391c685d5d8f39a8c8eda9feefc. 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/DGA0R2311556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf125c5809b8d8a15680b137f82aa0b5ff36551f4a783dc0d2af5e6ff879073c. 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/FRX282421745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b057e10846503e8a7cb201bb4a4fc4001bb32dc5aa6382e98529be11f30057f. 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/FRX282421746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f0b42f2800fef43b80ed31c1a47c826202715427b63a253b690e3934ae292. 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/FRX282421747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56876d4ddaa497b6f8b0338a1502652e426c128ebfb1aa5939495be03524d5db. 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/DGA0L2321354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80643a73bff927bf937e080ae45762bbc86cfc2e478602784b784cc977520dc7. 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/NLLP62000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507de8fac36caa195a4a6f619a3059a4c01ce4bd713f47c33dc4b7df16709ab3. 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/NLLP62000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea7d422eae8845cf13954b8a8c3c1ba9a3038bcf3ccb7c51d67d2858c7befe6. 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/NLLP62000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1dac1ba7b0729116152ed7b5ed969382ed324c6dac138447f237254843fa7. 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/NLLP61600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf416f6df48bc88dae1f305b0986a89f06488c58e1cb9b49bfe2bff8f4419a37c. 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/DGA0P2463551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b057e10846503e8a7cb201bb4a4fc4001bb32dc5aa6382e98529be11f30057f. 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/FRX282421746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb6c96c0f0129e399a6997890862d072eab22a6b7720b2ea082d5b28cb27ed. 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/DGA082399669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80643a73bff927bf937e080ae45762bbc86cfc2e478602784b784cc977520dc7. 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/NLLP62000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea7d422eae8845cf13954b8a8c3c1ba9a3038bcf3ccb7c51d67d2858c7befe6. 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/NLLP62000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23008676007911b48f23d9747150f723d2655f0daa2315a9154d72295a9645a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLLP62000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d41fd0e23b2dcce7e0c4014ab737b7713111e040f34c0cc640cf40ab7869f13. 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/NLLP61800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094affec60eb94277b9d04c23dd4c45633fe29dbae57f796e9bc8886268b18af. 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/NLZ291600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9244a0c92756f804ee25e07ac63dbb165e4a5d44381621ed66ef7b374cf392. 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/NLZ291600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6148e894eb3463bf82a987b597252870bf18c3483b4c0de96d410b012f893e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:08Z), 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/NLZ291600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1ef63d91ea85ca24084f8b87fe7ff6780ba3070296a0e2e7e8f5df61d1396. 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/NLZ291600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a8323493c29eef7bac506f9434a03efa965bc25b6a64a0d3b48e03f6f9fcf0. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:31:33Z), 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/NLZ291600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ab0e93c184811702a98557b82724f4a82e42b1d0cdefa07f6298e6ffa6b5f. 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/NLZ291600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3612a26d1d9377e000eccff252a21e35d90232165bdd8742bf9543b591c49. 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/NLZ291600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf963b3f59c53646f8270c97c935a5a368c3dd4a0663de190dd5eb0ee6a9bcc8b. 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/NLZ291500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb360f9518cbc970879ae8fc55e4fc5a474d837b3ff1f8ed5c62408af8619b0. 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/NLZ291600062.