Darvin may refer to: Darvin (given name), includes list of people with the name Darvin Furniture & Mattress, Chicago-area furniture store Arne Darvin, fictional character in the Star Trek episode "Th
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 0x82b4160cdf29eb1f079476ff19a4c7e0cbe6f6ce86de33231701732ef11222f9. 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/65cdf4e9-8911-4560-9536-e121fbcf6768.json and https://artists.proofprofile.net/proofs/artist/65cdf4e9-8911-4560-9536-e121fbcf6768.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 0xefb0983ff5ed8b00cab1d9d84f5a527d2ed0484614a8bdababf89882d846785e. 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/BXVR21600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f57bdff529ff83b39b0723993277e1d093d41fd7f204213057c203962fd66. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/BXVR21600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f70a62d571013bbe96c85f36ed5da7bccb4154d1bd599ddce3e22f4873a769. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/BXVR21600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a61e13ab848b40434d3f7a0b3d892c9ecb7931daa69b530114f4ec5d8e78a0. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/BXVR21600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258836466914112656bd2fbba02a8c9efba72cd51acd012162fe7a94984df9ce. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/BXVR21600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b016bcf810908301d2adf0f9821e0584f8ffa4dfd3675ea7b0b0a034c5f2f1e. 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/BRA800500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf2e6abe7b548570e747656ceefe1e9da176a703a247923a8aa6446d14e0ea9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRA800500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabc7b4ee4d609ab0f6a675f8091216ff72641c4d1dbf2a61a5b630f35810823. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRA800500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da0b36857d4d3f8cc3f1489ac01223e98f6b6f5800ed9b404353f7ef04e836. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/BRA800500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0028c995181391c5e01b937eeee033b5dc84f17501d4bc84aa8acf05dd0ff8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BREMI0600655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c829362f0c8738099f2af871b551008dac77914df916af623135337476d613. 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/BREMI0600650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e6cd6c1255f31184d6eeaae26d5f2fd5b1aa0d13f4325e2f69a2f181f8a193. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BREMI0600658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d209bb5bc146c1a8d5acacae1a05b024b7dca63ce25aa160fd737d0ca102c8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BREMI0600652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f6e04cc4a6234c782ef1f35958af013623e2cfda70a77b39279c7fc3ca550. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BREMI0600656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff02d6fe213770df32356c99228368789075bbada946061948f903dd96d017f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BXVR21600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f9d5cffd85d86b8eb9587bc44959d4a6dfff15696ab865ee4cd9ceaa93ee6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BXVR21600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208bcb5b9e336bc23f22340cd642c34f80c4222db68cafa9e5da89e2c636fcb. 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/BXVR21600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4f362808586d3a5ab8b343480e39c7354eeee9228bc519156143d90517b4a. 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/BXVR21600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b877421c946ba43bed8dfecc3c04538da1b7834d34113cfd49be8a608f9f134. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BXVR21600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1db26c09b0c88eadfd7053bebc5f656e5f7d7f2cb33ea527e5586eb02df9a38. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BXVR21600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7dcdab5a02493addabcc0d52a8d90cdd640e1bf06558ab10dfb3f777524b5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXVR21600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c999cd823a6ec42493a5bd31455fdeddb2548d3d6a46769166fa46443ad20. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/BXVR21600033.
Fica no Ar / Noite no Cais / Nada É Perfeito - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca0e055a4190ff47219c038babf37457e1883b7f8d2d54cc96f28fca5625f14. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BXVR21600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657360585987652484613fd44ba9694dc89f0ae67caac18d88934981d10c117f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BXVR21600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6c2500f02870c805906840fdb1ab37abc94c69818261cd7186f5ccb34524dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXVR21700005.