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 0x902a9153bc2ae6c8d9a99b2221a461c9e6ffc86cdf70366442827b2a4fc026e2. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9a2ba4f-6e28-402a-9e50-ee4a9da41f1f.json and https://artists.proofprofile.net/proofs/artist/c9a2ba4f-6e28-402a-9e50-ee4a9da41f1f.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 0xcebb074b19fee634ef1b10a9857674bc9b1c0b9832a14a9f89f686a42aed9c02. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:55Z), 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/PL05X2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc59c56993864ab9218c36b0be370554ba9d71f1e66d39fbd47b0badaffe8b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PL05X2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeffcf6b8c05452c91f1f94a3dd0cee129a99bf232fe08ab568734548506b5e0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:53:48Z), 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/PLI367903220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e612e5738ddaff8c407a256979a243540b5eee1dface2e3bff0c1bf724b7f28. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:13Z), 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/PLI360070020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd820f78494306aeaf9bb64b2e0812cbf8b782f44e411c77f669dd6ef82191b90. 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/PLI363740870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7e850d1e9c61ee6e976576e2265d4de339f8a5141a296f619da9f0d195ca0. 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/PLI360695271.