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 0x64d402a3202ef7ec24b0b6598a78810937ab5043e28b1c97ecb39d076ab3b0db. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa68a663-df8a-43e3-838f-095a6f24fa71.json and https://artists.proofprofile.net/proofs/artist/fa68a663-df8a-43e3-838f-095a6f24fa71.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 0x34ab0197d6fbb437a9a8349ff5e24c0efe9ef159881842f558684380150fdc51. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:24:05Z), 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/RUA640900650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4894859be7b3cc98ce428117ad3778d2a7cfa0efe7f31584ce180d3874f22d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:47Z), 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/RUA640900651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a634df466020fc6269c0f415669bdc4cbbd6580cf35e5adc0b713db724a22d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUA640900652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a08293596fefc0ad6d2e217ef0feb6e11b7c2febd4c270e7296bd50a5df68d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RUA640900653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9a344785b508eaa074f2fa5fbafced1d5b78a3dd9990ece64495d47d2e226e. 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/RUA640900654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c0759f010481f301cefc13806ea275596b3261092c5ae5d1022468db91b18e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUA640900662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602d0edd0018b497830464cb3734154620a79dd6a71b64a463bb0550ae3460ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S1700279.