Brian Protheroe (born 16 June 1944) is an English singer, songwriter, narrator and actor. He is best known for his first single, "Pinball", released in August 1974, which entered the UK Singles Chart
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 0x1b49650133621ccd80f6a3e796f637d8010abf7db2c32e0096933d579598574e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb5ef956-94f5-4e0a-bcf1-c0d5ab0dd2e0.json and https://artists.proofprofile.net/proofs/artist/fb5ef956-94f5-4e0a-bcf1-c0d5ab0dd2e0.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 0x546f4882e60632be9a0a888fa4857ae025fe4a5566a5d0aa46056dd95e460793. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USCXG1101404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66605872047264933663662531db70e1269e3d7e842a9da1afd2b3136cf5a0b2. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBAYK7400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a89de5b03f178bbb72c4364893d65b01d20be3ae0d72ef2c523e6604f2d712. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:45Z), 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/USCXG1101407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8258ec713ce108754321af75eb1b1682dd0b8d93c36e09ad121c1309f232b89f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBAYK7400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff448d32ca2acfe7dcbfc1892abbc3186fe34b5eb5d862d9be018de0bfbc71. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USCXG1101412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3a4bbbb65a040c28009741a92f016e3fbbb92d0e5a068e5576641e811a9b3a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:28:35Z), 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/USCXG1101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bf7c7ad13782d937751463b9688050f368affd93cd2e21ac9e260c3f1f100. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKZ5A2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bf7c7ad13782d937751463b9688050f368affd93cd2e21ac9e260c3f1f100. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UKZ5A2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3fde5e4bf158d151d75586bb063087a5ac059d57ae3129aabc52d907453b2d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKZ5A2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251117c80debda677c14473ed917fc8a855d05f9201c3f613761464bcf2142ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKZ5A2000041.