Lastra is a surname. Notable people with the surname include: Adriana Lastra (born 1979), Spanish politician Alfonso Lastra Chárriez (1887–1946), Puerto Rican lawyer and politician Anselmo Lastra, A
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 0xb5fb0b4930a9795ffd9d49d68376e745b59f3ba657f4b99d34cf32de2e6515e3. 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/896e149b-1865-4163-bc87-a7da5400e55f.json and https://artists.proofprofile.net/proofs/artist/896e149b-1865-4163-bc87-a7da5400e55f.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 0xb78f455b713504923eb2502502821a2ae38632299edffd73ad0148ce709fd42a. 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/BX7MG2100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2ed811c3b5c3332d72d7a3ad561213ee451a81ae07141e5aac55d8c7bebdb3. 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/BX7MG2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28faf0cba5a772bcd5b2d8fa87cb9c3411fb1dfcd71565d1adcfb81febeba9bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX7MG2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4788f4951c1cc34a4ccc67a66988709b0a5cd02e1475b6119bd5f9c313fdfe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX7MG2200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db27429aaac13f91b583ccfbbb471d46649e23963d241c90642c08c1d455b5. 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/BX7MG2200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb9f758f4a051f37fb23676c11791cfce9531e6fbf29a0b2e97c535cd1f5bd. 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/BX7MG2200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf906b43d1f9d692df973d2128a0c3c89bc6c5adbc9a8cc09aed2223adc8ca2be. 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/QZTPX2286332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d536fb01ebae36ac2d9be9039eb27e5f3cb792fff9999fb28067c33eaccd3c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTPX2286333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0f7cc5fa84f93a2a79c13531bb9fddd90d96359f7a49838414888ac3ad97a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTPX2286334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c75772c0f85c98c07feafcf9eae33d3ad1fbb0124a7840f45b6ed44c91d8c74. 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/QZTPX2286335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b513692367b39a8fc521e6d9ba6706abb86d3002d9eb8291c74417cebb6d54. 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/QZHZ62238514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472b4a8ce65169b3d86cb9068f58727583187c95151b838a592432bbaa76b6c. 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/QZGLS2263641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488780e86d4257ab15140d2491fa5d91a7552e4060fd6d3c0cded2aeb24a6e5. 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/BX75Y2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488780e86d4257ab15140d2491fa5d91a7552e4060fd6d3c0cded2aeb24a6e5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX75Y2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f837523af073e88cd7d9ad7be0657dab12a4ae4d07eb33bf68f967cb019246. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BKDIV2200022.