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 0x73d0942a4d36a262a8fe0a3cde0dc04f7333470d224f4befa0e5891f921ca81d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619607c8-e444-41c9-ba1e-4c69a3622f6f.json and https://artists.proofprofile.net/proofs/artist/619607c8-e444-41c9-ba1e-4c69a3622f6f.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 0x2d774d7f1f1bd5ff0d14c53dba25d93e63bddd4c8d91a24c0689d3307ef0ea9a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:01:49Z), 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/DEZC62034696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce49c22052d422f78fcde1db17b037cdcb1aba695a8040574da66afdd96c554. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:46Z), 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/DEZC62047021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4cea4d0af1ac723a988808b05b4d6bc369ea3c7f2fa51dda9e5bbcff8d342. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEZC62346840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484a814a57b7b617b80f925fd31f4a694d335648fd89677ca7bf157c2fe5938. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62505127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a093d9f3f2b66aee13c99fca9e58d4353e2a211d428599a107e193110119a3b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEZC62597934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb86720b66fe60a5eed9163e136302827cec56a7d0fcbc4264de408466f48fd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEZC62588167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ee5820976403fae50cb21812b1b813bc083e762980cc1271487fa2b695b2e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:33:11Z), 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/DEZC62581906.