William Brown, better known as Compa, is a British electronic musician and DJ from Clitheroe, Lancashire, who began releasing music in 2011. Compa first rose to prominence following his self-released
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 0x75bae1332c25e8d4c94af35438665e444b2c10f9c96a5103ab8f8283274db65d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59c10a89-aee9-4e08-8343-0bfca5b60e70.json and https://artists.proofprofile.net/proofs/artist/59c10a89-aee9-4e08-8343-0bfca5b60e70.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 0x4af4177dfc94d8eb004544d17f23afdbab3a809f9da9a8ab9f4c99ddfc0dee73. 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/PLE351400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d357203454d0cb4924720aa6bac980e1c4e470b9a2d2f8bbcfcd205fdf4057. 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/PLE351400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197753b695bde3b17928995d2d7989e7b83902f2cff0e119f231ef973af9a9d. 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/PLE351400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c34541bc8958200669b37978ddf42e3232e206ddace310d05e1b39c27be9f3. 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/PLE351400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb86b9c6f8f4fa3399dc3f8178f2d9858043ee9f2a97f8275271e2f0255be50a. 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/PLE351400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0437a285d62488ac8f9def74bc9d7831e989880acdd20e1dac6bccc90c5afe6. 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/PLE351400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabba141d38af29cc1dfe82205159150c9579c01afe627e662a096ea24fe710e3. 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/PLE351400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28baee16f6734d39223f36124104b5557c39e5efd2a2daa456a467c63493df5f. 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/PLE351500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96bf217097e7723a4da3654067049e9a5a52bf9d0ca8ea0f001bd5e2cf77ed. 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/PLE351500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467be5382a63ecab3bc7c9df9b5e8ee36dc24f5ec1d73eb1d650736f29c05da. 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/UKMGC1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2862b2a5d555e3b78321d95872af9608b83056ba64b54c162801415b03a4205a. 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/UKMGC1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d0764e7aa8858cc03ea519379f0d4d7a052f66e64bc9bae15a43ab5521b3dc. 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/UKMGC1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a3749e9dfc03bb02478a0e0f9cc9521a075c9473447f46f7fbc5d0548a207f. 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/UKMGC1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef9a8c20053ee7e2ba2d336ae8b1350e9337d21a7201ce1cb96c7a7dc725971. 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/UKMGC1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932f1efd3e4c7ab53cacdd4a565ae20adb79d87b04526bb1a93e2b4e791770d. 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/UKMGC1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7600264b78b16b121a1be2e2aa1a6687e50d0ced5b7f8849c29af3632b57ea. 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/UKMGC1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc1fb8150c3299a77a0adebd67750e0b14aa94a310df11f7918b928ce4e6d0. 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/GBDMM1800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85786c8747f001bc4c5a2445cb0bc8fead054d13e77e7d5b971cfda346260e3e. 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/GBDMM1800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae33d4451b19bfbdf94069e9d34b53137887aae396c7fc65e4e2bc1c4264f38. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBDMM1800110.
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 0x9158d556cea01c65c4646882eeadd1024982ce0f3eca404b57255d6795ffd252. 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/GB9Q61600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170b9390f8c106ea5b6812a085a91ac44f7a2a66b5c2693764024b771cc3c418. 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/GBZU14000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf18a600ba549b0cbefb69b7a8787bf63d9d83de958a14b0113811d39785eaf. 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/GBZU14000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8be121526f68c56b61255d51341f5b42ed6c536af50373f8505ff90d356c13. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBZU14000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73dcf39d03d3716b16e0fa5ebfd93f90ca7dc2243357ebeab382e2b6ec54d15. 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/GBXUN1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0043f93c68919a418d7624fde82648f3724c6018a853539a81b3e5c3fe5b1c5c. 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/GBXUN1100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2834d00937f215eafbd982103020d28e9dbd8d51ad893eac4928e17e0b17fce7. 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/GBE281200709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b702d0ab825d12e9a9fd7ac74099b2692fbb4d3adc0b06619f0cb124afac615. 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/GBE281201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76dc58c499c8173af0c0af520486a641a3b943721a862032dd8ca4948c02a30. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM7281700950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9bc20c4ee3f9f68b57c5fe43af6b6f6b8e5b0ff24f71e6976ff77b108c257b. 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/GBZSU0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e8927c8762e5cf3a0e490d93b06787d6810810f2161a088fd31cf29e34448. 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/UKEWB1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9937c7ecf5d7e66aa20e70aa94c34403553d190671761366ee0245a6030b93b. 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/UKEWB1600060.