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 0x1374bdaff9287ce55e959c303138b65e77ffadd3b453f746eb09cac80623c088. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab4cb890-3658-4b65-bf8d-7283de1a155c.json and https://artists.proofprofile.net/proofs/artist/ab4cb890-3658-4b65-bf8d-7283de1a155c.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 0x81f94e94f7693c082204c981ec59c7afc7a45441c62b013f3973f3b13fcc316e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FRX762422479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232a83c0c9fb076825b7546aa459209b75398739a740b632aec253866e47e79f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX762422481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536a683f31f43af4032bd77b50cfd18c03f9c8a673cddc71f7e0fb0929320272. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX762422486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0af20ab96f1d911c3de7ac03625c917efc9a7d0f88f9c64369b550f043825c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:22Z), 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/FRX762432146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94dcb4fa5e35100cdf87e0ce624a8dec945fc904980d678bc2d29cc909d850e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:06Z), 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/FRX762432151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a4acada1f36454e17f6a583a777b66ca2805f05aacb7b4186a269f7fecb42. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:41Z), 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/QZZ662437448.