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 0x1f18d8f976b53262da6fa7ac4c8ca3cd5f0a941d2cd5ee30682e1dde0c83f33d. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0987c45-e01c-43cb-928b-1acc7f264c3e.json and https://artists.proofprofile.net/proofs/artist/f0987c45-e01c-43cb-928b-1acc7f264c3e.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 0xb4d9fcfbbb77ac7d2b14e820a69d764a0119dd4c2f1421a2d5ea0eda70eaeb26. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX8LE2409899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716894f54af0d620ccb73b8629b92b89edf59e47790cee8a4f7b33ee0bc907b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX8LE2435312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fa2930076ad88ea092c49e127a8152c9217e8dc76b4ad106572320c64f8019. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:33Z), 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/GX8LE2463805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73102747a56d85ab934a739a9af63ea4d89753465731040a15ec722bfbcf2ee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LE2406231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc7969f0803db37988e67de1c103448181a74787228276727b4096b4fc8040d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX8LE2414347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b52843d5b9d3d7986ae2e006e9ddcd1ee8936409265d188a3ab3e19ec8479. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LE2477822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28eb56cdf0df47d8c39499a71b735788e6bc4b0dcc1e58dc69f4a91be10de10. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:05:51Z), 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/GX8LE2411166.