An Danzza is an independent Spanish folk project from Madrid, Spain, produced by Andrés Campuzano with lead singer Haydée Mariñoso. Its music is mostly neofolk but also spans metal and neoclassical.
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 0x507e5713bf937b6e1df41b3ad07aca60f239a083df55590770beaaba4a2f7fa1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa45a9e5-d1a9-4b14-9cfc-9a34091dbb92.json and https://artists.proofprofile.net/proofs/artist/aa45a9e5-d1a9-4b14-9cfc-9a34091dbb92.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 0xa45f38eac0800ef1eb6cd5ba2b7c068837f5222cf5bc883e3c8c9d10cc3e4147. 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/USCGJ1435272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445b2cf4e371e9e985f9facd4307d22938be85b2e6954061698f26fc398a8486. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USCGJ1639794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18131d44155ad80b0a66dabeca885969fe423b406d33303201520e4b1758978. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:36:31Z), 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/USCGJ1639798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3c1b3d4d46b07b985f4f3893a15462d7425d61f75849cfbaaa077c86c5d16. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:20:06Z), 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/USL4R1813328.