Barrabas or Barrabás are the Spanish and Portuguese name for Barabbas, the prisoner who, according to the New Testament, was chosen by the crowd in Jerusalem, over Jesus of Nazareth, to be pardoned an
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 0x65e8f13bf9a59c6469037097d56d9b400c5f07f81036693e792f4e5dd1544bd3. 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/85a017b0-8654-4b93-b45b-202e7c302fc3.json and https://artists.proofprofile.net/proofs/artist/85a017b0-8654-4b93-b45b-202e7c302fc3.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 0x39aec67840f6e6272d8a9a268e9e85ccc2e2fe422958645336b6edd76adba65d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEA370801312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a9bbca8952255a17034a9a3e860ef106a7f476f7ad9f37eecf764d31e1812. 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/DEA370801266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c956ffe35cb00d622983f0445957105a5b261d317f3d5b18c699ede00862f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEA370801267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9b607578af9063ace73adfd85eaccd592d617c9e4f59f56ae7aba282e8ab54. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEA370801269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f000b81561df1287f06d2fdbb7c1cb40ea22a4dce6d17ef345a509641570eba. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEA370801325.
Barrabas. Sus Primeras Grabaciones (1972-1975) [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652acbb22031698c4a4c8944972407e0390ed77b5e5aaa1de8d0b7ffc9036a2e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ES6341300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e7e134fbddd114cca51b29118c6f180fc02237790d1117410e1bdd0dc11605. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ES6341300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d957b115268de43e66ebbcd2e5d879fd69602ff3c990697077c0fcd7f7186ed. 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/ES6341300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c3613b821c6b82d47baa50a6cd1a95ec392611c32c9eb2b8c95e77b080b80. 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/ES6341300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85fde09915e6cb6ac5f1bd2e7ed7fc390959497a54ce8a2c7b3a1473af3cd87. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES6341300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074982ef9b9bb4f20b41302e5cd6425fb2aaf611a9127ed0d60f907723e0adf0. 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/ES6341300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da249ab04290f82ee32896058876bf54decd7ceebbab26e2777c6b821518c79. 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/ES6341300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baf22ead0f551068aa3030fec4310ee98321fc93454e7feafe4555bf0326217. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5379900439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079b1212310848cf48fa90ffc3985f42845a019a7cc48d1e83de6383326dd8a. 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/ES71G1307166.