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 0x8ac91ecf91cc914bb1010842eb7d9e89e81cbd182de1952be6df18e57b851914. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/782fd37b-15d3-4325-8aad-3b545bbda42e.json and https://artists.proofprofile.net/proofs/artist/782fd37b-15d3-4325-8aad-3b545bbda42e.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 0x322d170c79f50800c90f0ebdecec4b1cf17ef5d1683dbe668bf22a5cc97c9aba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6541920066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28236f7ec7f1c43de3bc7e6f2fa063b097903882cb49b4738db7673e35e0c4c6. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:52:01Z), 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/CH6541997904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06187ceeed93c99d9bfb66bc4bdfdf4d95a9e77079aeb098cf606c4b82f572d2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH6541997903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9f530abbfd98b40c75e43ee1d3327d33d4f3658b796e2bcdf7e5b977a00e5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CH6541997907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa7854af64ac5c38a048e812efbbc99c02bc5436e76e6df420e00772caf237. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:22:01Z), 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/BEEA77210008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41855739c6aaef4764d4e0dc36c455a06dcde78afd58e8f8cae89012f9cddbd2. 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/FRD0K2302250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc8844502a901b83d528a2dd22414a5c952b0afe8322ed32d2979f9d72cf361. 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/FRD0K2302270.