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 0x81bbe5a3f30b4f88840aa2bb95450635844de1f7abef8c64bc87c12f98142eab. 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/4cf9f600-77b2-47b8-8905-7eff8f308195.json and https://artists.proofprofile.net/proofs/artist/4cf9f600-77b2-47b8-8905-7eff8f308195.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 0xee06a1697fdd38df39b4c13affd21ea726bf555456e76335c4db3e78a128d836. 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/ES71G1612319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6fad71b8b2e59a94828844d9927c15c72ed22bf2a3a90eaaf7fe508d2d0bd. 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/ES71G1612320.
Qué Hace una Chica Como Tú en un Sitio Como Este
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6a4c853ed1d9cced4358605e48f354e9225c6c903bc5a21f86c9b3efda1d0b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:48:44Z), 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/ES71G1612329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eae42d25d9ac1b817258cda2fc6fc17b5a4bed32966fec804a25b1429b8bf1. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:06:41Z), 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/ES5701700317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa162d88ec8322f8b31b7ebf013ae65ee60e299ce8c4dae118cd2e9ebee6fcb24. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:32:22Z), 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/ESUM72300258.
Tributo a Sabina. Ni Tan Joven Ni Tan Viejo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b70e380333f7795ac86b5d8bb98541804cc5efdbefd7d12508a9e1fb1a247d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5151901333.
Y Nos Dieron Las Diez (feat. Travis Birds & Zahara) - Tributo a Sabina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933e18753b308178d6940bc83db8304013711a47c10f78658945ac561145ab90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5021901596.