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 0x6028362683d05ba2589349275a5d556d8835be7927948cc90282b05e63cd2ca1. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8154938f-4f2a-4da1-809b-b69878ed4859.json and https://artists.proofprofile.net/proofs/artist/8154938f-4f2a-4da1-809b-b69878ed4859.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tuna De La Facultad De Farmacia. 24 Éxitos
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 0xd36f5d6f4ec28b5f35790229daf8e1ec73f8d6c3fb03b0d3dbe7ee08fc8ba1ff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:05Z), 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/USA560944004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c18380171e868def0ef5e21e516f5fd5ece481372d9fe26c00f95dde14d3b. 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/USA560944008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87b87757a402f5111898dc608a459471f084534369bb390faea72123175414. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA560944009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c83d2a68aa7b615486f1852af34df736de794670875b021d1046daecdae5d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USA560944021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c755be562d05a8d79480c9bab5cc6d1aade94222e634ef08815438f8092b94a. 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/USA560944011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25806c99b87f58c9da22c89043cad8b3c7c2cc181d43b694d8dd0a6b8ea4583. 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/USA560944024.