thumb|Sara Torres (2024) Sara Torres Rodríguez de Castro (Gijón, 1991) is a Spanish poet and novelist. In 2014, she won the Gloria Fuertes Prize for children's poetry. For her first novel, Lo que hay,
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 0x6ed9f6ca5ef279d6a8f44ca413ca96a6a728c41a90ea8006043b8d1c1605609a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f580a35-90aa-49ef-b0e8-db3401312116.json and https://artists.proofprofile.net/proofs/artist/6f580a35-90aa-49ef-b0e8-db3401312116.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 0xaa42e9ad6bb88b2591345d796e85b04d795d4192c72a78582e47786a12c79940. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM81253672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20e714d7e1b7dbde252500d568ece17a6bfabb1cd31aa23240a4d1b3ecc947. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM81253673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df6de13205b39de50d6796fec5b449e1a064009f98e9ad7c2426ccef6c452f5. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USHM81253674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ece4740725cc2fae411039001b1145e1af50d9fd85309094febf6ad9a4c6a2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM81253675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a324838cca422a6ec8c643a18892abe22c1cadb9d08ed5955496ee0e1c5d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81253676.
Sal de la Tierra: 50 Cantos Contemporáneos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56af734bc75d6eba608f9ec748bf34440ec3d899e14806070cbd98bf32e33c3. 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/USA4N0600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5fedee03f856d3fca1ad2d571615a9c7814266be953369a6aa604be4a7d29a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51158056.