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 0xaa67343df27614bae17412cf03a2aafdb182ee89fb41b27c09c56c992579521d. 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/b267c365-1c0b-4ee9-9dfe-8a831348c8fe.json and https://artists.proofprofile.net/proofs/artist/b267c365-1c0b-4ee9-9dfe-8a831348c8fe.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 0xe0303ba110aff541a887fb3840e6133099cb0e18d953cd31df399518f2b2dbd0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:04Z), 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/ES5150801651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed166d9eee286c3add109fde02c132be73468e3d58b3834fda6fdb8e7f4e08c0. 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/ES5150801652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10f80b73a77893d7487c358b11f0dacf7fa388734bcefca5cc3a48d7ebb0d7. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ES5151102769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0039de1eef3bc57dcdbbd1e567e44a233a4063f0f675e22a3459956b00fa8dd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:15Z), 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/ES5151102790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b39835ffd1ee7a10612af65f51cdcfc29d7f46a7b56728c58b87a2ff21af72. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ES5070500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78db80e185fed519da67ea459b2668b5b03f89b1356f8bb3007c1797e001a3b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ES5151102793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac59d3fe3f465f4d79b6d745c192af1b297c6cda263f217fa523e435a4d4401. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ES5070400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079b04c66d7b6b97b423d6c41b9589334e3b658f854934b13d6eceab7acdc253. 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/ES5151102794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337353800eb52916f37b5eaf4c4949aebcf3df2f3cd07a48d73e267c53205bd8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES5151102796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9d1e85ef6487fd982ffadc444cff1d0d1ec26eca76cc1fa6dc0aa512521e9c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5151102797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf482ae94187cd0374ce6f19732543f86e2f625554d43a44ecfa7ea0300d5e506. 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/ES5151102775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2a64753252756d6a2839982089d5894b623a7d1cc91b236d71227abc91e396. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ES5151102779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b62664d90955b2b31efaa5635274d66611d48025c715c9da2e4f6dd156cbca. 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/ES5079700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ced13fc4ca4bf3175448b17f91d34d0641d15ca454c3dcd5780c65ee1e75b9. 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/ES5079700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98e7002d26702bb9639b31f188c2c368108ffedfc4ece81ec4b42962c3c9f49. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5079700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfa049541c782b26380017a0f92c28c399e0d2b9b952d97d362923d56f502f1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:58:14Z), 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/ES6679603642.
Cultura Jonda IX. El cante profundo de Juanito Villar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eba613af44816e250be81d3e9ab8cfe82dcc99fb4dc9c1800bf9147afa7abc. 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/ES6679800569.