David Peter Valentin (April 29, 1952 – March 8, 2017) was an American Latin jazz flautist of Puerto Rican descent. Life and career Valentin was born to Puerto Rican parents in The Bronx in New York C
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 0xb1c4def11ea1e5207dd5c197ffe0193055952b10a6729086fc116c73c84bb138. 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/210dc624-564c-4088-bcf4-87388243bfca.json and https://artists.proofprofile.net/proofs/artist/210dc624-564c-4088-bcf4-87388243bfca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Land of the Third Eye (Expanded Edition)
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 0xbd61ac4e116bba3073da7c4da284b9561a1e3d9b5d34d2a2da39b852bc676ffb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USAR11600414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d31f4ae3f19bbf22653bf73e5997a65d0ffe805d8bf0592c64e60db2389939e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USAR11800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60dfd7593e4ab2667c0170817ce46628e4d8fd51f86895aaa8fed450d13da89. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USGR19400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1198ab9cd0575ba104a1c03b6094971ff12f62c4bb089c33bf314972135d4c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USGR19400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92a19ebe21e2c8d5828502003e11e71af421dba5eac15eefe66408728ca755. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USUM70501559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489f82b703f174cb12979a7e8b689afb3c2073fe4c1cb3ea2036a7691b38ec4a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USGR10500449.
I Like It (Like That) (feat. Ray Barretto, Sheila E., Tito Nieves, Tito Puente, Paquito D'Rivera, Dave Valentin & Grover Washington, Jr.) - Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf78fd10b7c5b16b95f401c56e37c016c088d6b027fdd6955085cd0eab883ab6. 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/USSM19400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023ed561b7004528f1a1fc9fbe4ca4156f423390b09db08244504a227cbbf72. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USBN24900617.
Tu Tu Ta Ta (feat. Eddie Palmieri & Dave Valentin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477769b1f4e0e0c9246805190d6ec8c1fc30a96dac23913bce0d4bf8edace731. 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/USDHM1205801.
Steppin' with T.P. (Dedicated to Tito Puente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ade09d35df8206ef27370dd6fcb26d9eb8f0bf794427398b62e46099fd888. 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/TCAEG1937847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f7679377a200d82e2bbd39f1192343a68df0321f198343e21ebf86fb4de1a. 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/TCAEG1937852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9ee769fc25b8cf11ac184bbb76bb3609e75fa203e85165510e4500348bd12. 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/TCAEG1937861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae074d7eb6538c704038ef10641911095cdbcc82c2c35c8151d4695e9120b4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY42455425.
GRP 30: The Digital Master Company 30th Anniversary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66455d257d655e3ee76e965b9debcec96e92980cc2ab9bd3b25cff46792e1da0. 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/USGR18800029.
¡Con Mucho Ritmo! The Very Best Of TropiJazz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489f82b703f174cb12979a7e8b689afb3c2073fe4c1cb3ea2036a7691b38ec4a. 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/USGR10500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b69716a1d22a5642f540baeacc968559adea9fbdc6e59df417d9b8a6c23cf6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USTE10446201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d00f3e329148208d6e01489fa7fe85f3cf4aa4c1ed0123231934ed0f4547a50. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USTE10446202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1de789bc91e26d7186f44a2017ce5aabcd4221727c8d93a9cb8ce5ebafac243. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USTE10446203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75461aa659863fd3ab3bfe10dcec0844ec80bd126ee3870f563f1992e865dd6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USTE10446204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4beb70491dbca2ee01b79bbadc5eeff5f80b13507006b9ef19ae40a9fa7505. 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/USTE10446205.