Sergé "Jojo" Mayer (born 18 January 1963) is a Swiss drummer born in Zürich and currently residing in New York City. Mayer is the son of touring musician and bass player Vali Mayer and the brother of
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 0xba27b8667b30c9cf00c83af25b0b302871d73eacc1808298647a29b115ff9d59. 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/1b7470e2-aaac-4bbe-afa0-76639063b689.json and https://artists.proofprofile.net/proofs/artist/1b7470e2-aaac-4bbe-afa0-76639063b689.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 0x68ace26d61813c0ff4a8fe7c544c92d442907ac0261b073cf9dd4f9cf33f1993. 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/DEA891200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b78c476c939b3c941cf257ee08bc1ab3355ee7295d2afaa06181b45433bc6. 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/CH7811927498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96c4bde9698d48b632ef0abc28071b80b371192e009b11327465e66fb732181. 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/TCADA1744893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cfae137cd538e3185c94726ecffb1ce7e3953a6c434dbbf3b08a8125505f3. 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/TCADA1744908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7686dec87079f30da8bb49d421c9c25d7aa041e1fbfe96d79fa40243493e800. 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/TCADA1744910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3803645d1dadad50e3347df6c190a5f7b69d7e5cf24d70f1d828e96677190. 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/TCADA1744912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c777a9d5af7c09d19814dc56f7dcb090a7365cd74e42698ec04e293beb5d0e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCADA1744914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b42948d3c6af92133a98af07534a8cfb6dca935b7c051f5258ad070771954f. 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/TCADA1744918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1420060699e26c419e9b7b5c0640e39bf20fd8e1006ae77569c3950e9a3b30b. 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/TCADA1744931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b54ae0e932f8e5820ffc698d8388b6ef8c286eed8c2529b8cc8d6d08724643. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM6SL1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7095703acfbedc55a9927d134ceb317ebf56ef80de5d673768fa32d83a5f5e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6SL1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6262ace26fee1641a9d25ea523060f0862f9c6b277f5ad77c4ec7d74dbf53838. 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/QM6SL1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846df4441cd84a1810f17d32d1218d5900865a6776d809a3973e7d0fea22b245. 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/QM6SL1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1679ea656b16d3e4b33dc6c6aff576340c29882ea814599209983c820a21fac. 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/QM6SL1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea50daf4d97440c4f1e3d2a60d2a04db7a0bd8f3a8358c85bae8c5fd0122f3. 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/GBHLW1110783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564263ef103775e504c7f0af4d3c9ecb8436aa1fb21bd05322ab4bebe477687f. 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/GBHLW1110784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356f8366422cfd5864674d0ad56efa97f8f71702bd6b8c9ae96285a22cef4bf. 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/GBHLW1110785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541ec3bef51b97938abb1e75cc21e3d9417142dde174c6ca66dac1770e27ce9. 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/GBHLW1110786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3e7b35e6161dccf5d2474c5dd7f8fb55b74715c4185899d1ad76af413d4c2. 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/GBHLW1110787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66131a91ad938efab059762f82525a15d137e95751377a37d278bd8c7a9d17cd. 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/GBHLW1110788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1132c05e8e11c54fd1557e7b995c04c355ceaff39db9a67ae969e55bcac6f7. 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/GBHLW1110789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a68110541b2abae03e4c669d5fbba350e08b26907d1f3a920b4bcbdbfe3cf. 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/USR270900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2514028fa3b2961d4f0824ed8cc668c91bf6bb579956d09ff4570943685c9c. 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/USR270900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142438351700b5a36fd356691193e9a7fcf4d5c33db547021322f59f86da23cf. 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/USR270900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf93b71991547f78e447b0d615fc4bbe644b4bf880274afc7bec518acc2edcab. 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/USR270900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b98401a60c12d31b2f32770d6a7e41720c7dc2903d6789f5d210ccd93f2037. 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/USR270900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8c90191fadeeb7945eee492089e581ef8cc14f52190d9a7efc03e154cc4bd. 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/USR270900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e85c5999790c3e27d8d9257576d27dcf738265a6aec7a40b933139ee840709. 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/USR270900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0e6281247e1acf765d3f8dc7832a05db446b8696c4781c32c3592f82c6d3c6. 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/USR270900016.
Mystery To Me (20th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab0c1b49cdbe30b4843cc13b608653d48106d577d5561520edaab0d42f384d1. 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/QT3F42422417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde07ada985251e0ad1b73f9981502630e1e8bcf06eba738adae3e65fd5c336d7. 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/QT3F42422418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7bd11c0ba63cdabf51586cea62e18b38fab3d8fbe0d20b005da6e8f9b695a0. 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/QT3F42422419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3891ecdd66252d001288edc43686519481914be68f97e5e3207c90a79da37ecf. 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/QT3F42422420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa168db9eccfc834783f47276904537632e5f05926da483c13cb9713c6cdd1cbe. 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/QT3F42422421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d477bbc3b961a096ed5d070f9bb47586bb77c13b4e1ac49cf615ac13eb9890. 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/QT3F42422422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd04a080e6cf2170c0fe7b6af0d710fa6af866c62ece953d1e4e39501b6e9017. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:16:33Z), 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/QT3F42422425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6e954cd90d90d8f839ac1027a121cbc89dd3c90db30b4d81773422f7fc73d. 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/DEA591331008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9ad17bf049305a03af26c2d36fdc6fb9fd5b269af3ded765116ec6b23cee9. 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/TCAEJ1966815.
Blacktip Reef Shark (Carcharhinus melanopterus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4847aa259162d98821dc6103510103ad8b56366b188652b825ce5deab0708825. 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/TCAEK1906606.
Electric Job (feat. Paolo Di Sabatino, Christian Galvez, Jojo Mayer) [Live in Teramo]