Vierra is a surname. Notable people with the surname include: Benedict M. Vierra (died 1994), American Roman Catholic priest Carlos Vierra (1876–1937), American painter, illustrator and photographer
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 0xd5535798fecbaaae2813561f015782dd37ec0885ef919ee2f6e5dd349105281a. 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/c1cd258e-e2ee-438d-b5e2-43f0ede9750f.json and https://artists.proofprofile.net/proofs/artist/c1cd258e-e2ee-438d-b5e2-43f0ede9750f.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 0xf1eba5ffa98d63c0c02e79a35553aaa0661706e2a5efafdee3d5a750f3423d9f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:24Z), 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/IDA181243111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca340ecb1a7227aef270337ad909171c1e390cd9d4e93bf3a50759ddcb374425. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:48:07Z), 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/IDA181243102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a278c0b3289a55acfb2ce8451f99a92f49140ce014678fe3ad531ca1fd6504. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IDA181245101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53858c2bec7a3175182eaf653090f7938b8db0dc8de3202d10b87c4f0e5aecd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IDA181243104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f5848f5fdd15a0c57e86a85980b3daec2ec6a6b86c79c345bd17d9dab3645. 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/IDA181243109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a13a20503d9754b658d14e25bda596fc8c27001b35d53771495f67776df384. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA181245105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ee749f7d8c267e8feeba64371d2971f0d8c724f4cf358de7ad92a89981e24d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/IDA181245109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f198575bede19c81392d36b970025102925cb3a51d5f8e2349fb8ad4e0a83b8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IDA181243105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39bca3d79cf8aebb8dedec68fa25bf6a2f84c9ac50fa40b7ce9e727de9392d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA181243112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb1b1136c19a538ac66f2e69e252fc121ac51bea8bf0e3e313fe5d1bb12d769. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IDA181243107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b95d035134bfb31945a20f280491a57f0ff7d7a71428b2c280f8153ff5127. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:32Z), 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/IDA181245106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e2b53f90dd0f2afe7e968c21ec95c6ef67e0f6734a62601f5b282ca4b8d27. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:53:07Z), 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/IDA181243101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a09473340896b5be937717bf6e1d92c5daf40e29f27b3bd48c2defb3d6f3c4d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:25:54Z), 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/IDA181245104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034fc0a382ff479979736fe5f1ef0451595e7d4bfe99c864abd48ca6847facc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IDA181243110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546c1d297524afa03d8cdae395f04eaf6c0c594adcbf43e283da5f9f05b7433. 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/IDA181245111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66f723115154b1577189a1713eeee5c758cb670eb3e0c32a4f9085d37d6f62. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IDA181243106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2a39c75a882ec54fea03f2b22f583c3fe7af274845e432005cbe3a43047982. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IDA181245112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916dfa60d1d865e4f66c40ed39bdab49be6907e48ab552c7808abc1552b3bc65. 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/IDA181245107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a237ad12b4d48b77048206be2b54235bc98e21a5b37425d32929b17ddd072. 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/IDA181245108.