Marco Mendoza (born 3 May 1963) is an American bass guitarist who has worked in diverse genres. He became a professional rock musician in 1989 and debuted on Black Sabbath drummer Bill Ward's solo alb
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 0x9ecbacee5c09a86ed4ee4dd69bd7cbb407ba7b8ea66d32cfcd7fc0a881b55d15. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90b4b4de-0b6f-4f30-8ce6-cd46bcc44610.json and https://artists.proofprofile.net/proofs/artist/90b4b4de-0b6f-4f30-8ce6-cd46bcc44610.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 0xee3c44843ccbe56faf15d6a9f3794af70a07994aceaf849bb0ed025c1bf73007. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/DKQ4A1722701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ad0dd5bf726066cb4e26f21eba905344a1422c6e0857e7976831327d06a9a8. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DKQ4A2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ed868ba9f1772f56654d855807e45ca33561bc1e22980dd26e1876c9171ea. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DKQ4A2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0be2943a353dabfc0173fb476938e991b338bcf30b424ee8780bce62c70e3b9. 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/QM6XS1807532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cf80d502ec515313e12da2e36aec71a3b922c37b2fdab9a0709937376aef23. 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/USRY20601031.
We Wish You A Metal Xmas And A Headbanging New Year
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d695f4f91eee5195de67d7ad986736a36c51c96e7347e21d7314b35762bc32b. 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/GBCBR0800208.
Metallic Assault - A Tribute to Metallica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c258a867de20c606d60a444b2121a79c7fb97222cca0ff7c526e44760c5b6. 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/USA370567592.
Nothing Else Matters - A Tribute to Metallica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92f8b437730ba32f82762adf9f5882f7444388801b04e4cc82635e19364fee1. 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/QM7281495714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df108c6e1eadc88daa79ceb188f439c7cd3ccea55f995e90ee38e5a203a97c0. 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/USA560623815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fcd1584d672cd8bbd0f6af0a56cd4a65394bd248dfb2cc503e815a2702361b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:20Z), 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/GBCBR0800213.
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
Temple Of Blues - Influences And Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c42c9621884aa998f9c4014fb2d787afe37cfe9769462fb33fe9f061a2b289. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QM6XS2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2685c8bb999b30e2642c6d9c2a270983134fc250436cb538daeb3cf6eda39a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA371048083.
Numbers From The Beast: An All-Star Tribute To Iron Maiden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f34b3659dfa922c6b2cf8f9e5bdfb3c686d55641583511a8b0b7dd7d36571. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USRY20517265.
An All Star Lineup Performing the Songs of Pink Floyd
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1d432b883d05ea91d28c30cab2c20b0ff943eb25aa2eafba9ed8bcec0bb18. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA370505394.