El Astillero (English: "The Shipyard") is a town and municipality in the province and autonomous community of Cantabria, northern Spain. It is near the provincial capital of Santander, and it is known
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 0xf173d92663ab916c02d443b27540d38322dcbfbdcd587dbf237fa3850d916bd8. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be624cfe-ffa7-42a4-9e85-6de62d73f86e.json and https://artists.proofprofile.net/proofs/artist/be624cfe-ffa7-42a4-9e85-6de62d73f86e.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 0xef9d66cc0ae7382b69735d19689f8ac28691d27af41c2490ef60eb60de8fdb61. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UYB141615001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f7f0946156443e5154253a90119e67c8e181a5db93f63e800d6ca3570053b0. 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/UYB141615002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b8940180084c101f3efa6b376b1896e71f6865cd0619528ac8b6a2b910ba12. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/UYB141615018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa440235e1904e11d903d50580b451b7b99704b88ca614043caf5190a9335c5d7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:25Z), 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/UYB141824201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7864fdd78d493ebcc62c8f44f104cf8e1fd8532757bed9184759c02dd7c9cd92. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UYB141824202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6366004480f9efd0e2db9a2520634da5318d43e30475415648b22d1cfcd175. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/UYB141824203.