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 0x4996a9e3c3cc2fb687a8b874b5ed2623ea41bf423a311705096066dce5d2d7a6. 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/93da535b-373f-4652-869c-074cb2f56df5.json and https://artists.proofprofile.net/proofs/artist/93da535b-373f-4652-869c-074cb2f56df5.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 0x04c7797f862a830d3e4c5eebfe6578d537c45bf0565fdf739bfa90f3c19ec5e5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLD821000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87300f39f84f71aca8afbcdb9d8b08afb0551328b7248bcbee06b1c933b80c0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLD821000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bc4e9562e953b1fe4cd59884c9eb6c720092e460b92c5da7887196e813df38. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:21:24Z), 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/PLD821000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd652610d0cfe9e44c73a7b59e2b86eb29a25879759bd983cde8cd98f2c646447. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLD821000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9064edbd18c3e6f1a9bd1db7645b3b96e718bc1472ba782ec1406725918672a9. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/PLD821000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb6fb791dc29a096946dff3be3204a9f1454e6be832e2dd738a6056c93e8ec. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:29:47Z), 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/PLD821000013.