Ricardo Herz (born 1978) is a violinist from São Paulo, Brazil. Ricardo Steuer Herz is a classically trained musician, and also received training in jazz from the Berklee College of Music in Boston.
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 0x5cd5b76d413a5464f8b2be4738ecb2e2ea348d49e129780cc893969231390ad0. 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/457531bd-ba33-4bb2-b45f-7409af21b0d5.json and https://artists.proofprofile.net/proofs/artist/457531bd-ba33-4bb2-b45f-7409af21b0d5.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 0xb268723150083616e5b29715d58cd5b391abb1a78073e569e1d3ed32f5be674f. 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/BRUPM0800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674861b6ff108b3fb9503865c9285152bad062e2fd3c7ad1050525c445e81c4c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRUPM0800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41460d4e26ef465a78075aa9619c69f9b3a67762b7c921bdb0cc2eec67bb1213. 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/BRUPM0800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd43406160ea6cbaf4c815e983a819550d3aa0cf10427edf1cdc3e37c6955d7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BRUPM0800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437f5491c9e0d120f524bcb702c5fe88bf580a5c72207894e305c4bd69499da. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRUPM1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc159bcf7d571c562b69aac679ebcc6695d9dfcd8c5dc70f2fa65f8af9554a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRUPM1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504826e13e86bf76bd28c6b738180642747a31d2b641907e49f48e8023d29c5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRUPM1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ccd89beafa852647f62209f7c276f69d60a1a1497a1a2fb77065822ee473b5. 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/BRUPM1200012.
Chamaoque (Sur les pas d'un violon réinventé)
Nova Música Brasileira para Cordas (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f49c6289d06aad01251d4ee806fc4a38142e29c5cc63122c6acca47c7530e2a. 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/BRRZ71900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104b4046931a1517f5c5b1fea115bc2f67463653fe37780ad2d76e18aede074. 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/BRRZ71900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2b6dd250f616ff14fd3c9b141b4dc08094db618e9ad8d5fbec2a8dd69bd85. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRRZ71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069e2c70e59263e7c5ead4c7419f4c5f670f6469cac655c5fd2adfef5e4813c1. 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/BRRZ71900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acfaf6f09c5884c8c604042740a0dd60f3a79453df966aace8947776775d38e. 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/BRRZ71900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ecd0f2978826d2f22aaa8a29b0710d44e5d215db768dcc5a53cae94b62613. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRRZ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad7fcea0911d4c43466900b6a13e835e8bc5c85f66b7366c850f709ce2569d9. 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/BRRZ72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676af48d2d58d1586c08471c85a9a79f0877208d928f9b4b685979bff61a5ca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRRZ72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f360be3bd0002b38613edc4e17adfc76cb459b2c367f362a09ca89dfa46304d. 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/BRRZ72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229eb8f0b54ae61c937de0df3d24add7a69ab03d5841f9b53de8e57f7e1d37d8. 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/BRRZ72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc29522bbd20eed4e952d29fe033ac6857b27515a0eb66d046b83d9d621b876. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRRZ72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d26f23b4105a5168c5905869c852624170034a768711cad29a2da492a0f2cca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXECQ1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90cb8d2713b116e7d4f5c9a7906677bc946597d170ab2427dbdb62db9dac66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXLX61600009.
Encontro das Águas - Filarmônica de Violas Convida Solistas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21927da1a8414098225e02dbb1f656002c6b4d957e92331d946d3810521773de. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BR2HS1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6d78802569b528323a4c28492a4e9fb04eb6f4af5af86f74a2b10a6a2cf11f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BR2HS1700010.