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 0x48901d422db2b939a7dfb48dff986139c0c40ccbe320044f6cdd03f057bb2834. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e42763b-8c00-4fa8-9912-89e7456e183a.json and https://artists.proofprofile.net/proofs/artist/6e42763b-8c00-4fa8-9912-89e7456e183a.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 0xc16dae4b64f571ba4e3442839e57e2019aae995136f4f119e698c0641460fa92. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:42Z), 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/CZAC22001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf99116b277f0c1ec26a60b5a3d01cf4c2de37ab65fdc01f5cdb3a1ffd32ff. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:13Z), 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/CZAC22405301.
Legenda Ybokaj aneb Jakoby Naopak (Official Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7211d030cdc127470e837dbe72ba3137e724a007f38ebedb1116a83fad5c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZAC22510101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786c9993da38edc2aae35f429e2429720687ad5355e38f8599e9fa9b65597250. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZAC22510103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7dcca497a1695270439b5593142f09b8fc847e2bb562f1254c12dae16f6e2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZAC22510105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc5f7e3fcbb0069d548aaa5222d4e48d384277cb2de0adaed5b8812f005fea. 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/CZAC22510107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e17dfc02a6d2646e02ad4baebabbb062b2706b8c600ee71c6c74a994567d295. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:12Z), 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/CZAC22510109.