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 0x543c3a26572bb89b298b5fc59d24b093ed5d95b21de47a410be8a35e48b71c43. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/817f0181-180e-4460-aec3-c4f27f94ea04.json and https://artists.proofprofile.net/proofs/artist/817f0181-180e-4460-aec3-c4f27f94ea04.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 0x93db0debb3c3ac3ef1397332db5702b608f17995a9986aa10f98f8bc6d00a579. 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/TWCC31800425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b6741816abeeaee8f50aadc4cbb312b241ada8a70140404b9923d4b8c24a1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:08Z), 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/TWCC31800433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f82e8034050fcb16806556eaa00dac076446f4ba94a049980adb614260c69e6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:56Z), 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/TWCC32200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a730767fc62131b0fcd3d95dc4ed81106f4018c22610a324c78531802db1d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:02Z), 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/TWHE32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45aebce173ab5104674e0e3207fa68f4ac8d28bc5596b5efb716ca0fc1d47ea. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TWHE32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533794732eb81c42447e39ca7f005524bcabcff137702d3f88df831db4242e3c. 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/TWHE32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec96467e87e509d94ee4f02c1756162f878a77992683ba55c4bd233555984fc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:41Z), 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/FRX872583002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e2889315c145bea83f6c21de52518b91ed821fd8eb9b2d8d33dcddba3c22e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWR911618101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65404f4fdfe20e4ef570c66b8605a73f0f5c88c11d821c4c27e92d4934e90fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWAE32400429.