Maruja () are an English rock band formed in Manchester in 2014. Their band consists of Harry Wilkinson (lead vocals, guitar), Joe Carroll (saxophone, vocals), Matt Buonaccorsi (bass) and Jacob Hayes
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 0x5366b032dc74a0be5ad05b9740a17d6c7e7bb35d76ce878c08613ff686d41689. 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/08732514-727f-4463-ab82-0c137264236b.json and https://artists.proofprofile.net/proofs/artist/08732514-727f-4463-ab82-0c137264236b.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 0x7eb33513fe70247d9c86c819bfd0fd1208546b7d232494916c5e92d824e87bb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2477011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8751a6ae5ebca2d07fff3223aba23830d28e95408c3b5ce8acdcd9637e25b6e. 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/QZFZ62409072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7740536829bbe7e2483d351e165b34f1cbb8ed6972ae3ee7b6bd119633551a19. 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/QZHN72361537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db452a6c2082083f2ef8f4de1ebf8fbfb5ef465a1878a8aa4b6c332a837470. 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/QZTAY2326593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f90d4b7316d48e9853eeda4b9f8504e465da116e6680c3ad159405fde6ce47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2477012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8751a6ae5ebca2d07fff3223aba23830d28e95408c3b5ce8acdcd9637e25b6e. 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/QZFZ62409072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db452a6c2082083f2ef8f4de1ebf8fbfb5ef465a1878a8aa4b6c332a837470. 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/QZTAY2326593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7740536829bbe7e2483d351e165b34f1cbb8ed6972ae3ee7b6bd119633551a19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72361537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4a83c37268b9e3af3617fb472c2112d0e7ee55162250dabce4f47a7a24dc3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62392963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd412bd4eb222c77abb21a1d9909d612eb4d224dcb4fe4261b735582d8bbf0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62392964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae40dc7a7b1f85df8ae287959fc4a7f03c4b3174879908ebc84aa653fa9a03ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62392965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7990661f3a22cea65bbaecd494d46e23ab456d42e01dc3b69f9503ea316cf278. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62392966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9008e4cff8f1b216162ab4c6e1abdf3b2f5f5f355b95f4e6aeafe1aafa62b2. 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/QZNWU2237911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873f391de6fb4a4eaafbf7c9d0107be60e6a82b06f16b85f7a28798c18fc2af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNC2235300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe475c8aba4d228176b8197ff7387c0d2be4fe0495c3f1320fafdf54e8efc1d37. 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/QZTAU2178749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc78f55167e6ccea6a805d0a60b56e2378626dcb06243a23e7083f2d57acc01. 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/USL4R2069988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e70e7ad88cfff1c864f5bf63d787f7be6895e1ac6edb6cf2abe92841b4686b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH2076384.