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 0x5e27f35f59657df4a4d563cfa5c28feea105a918c1a056cd7a7a0ef59f897b8e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d27aa9d-f2f3-44de-a790-d50d9913e452.json and https://artists.proofprofile.net/proofs/artist/7d27aa9d-f2f3-44de-a790-d50d9913e452.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 0xfc2a41f42a03c04d301755e82097abffcffa4b4fd88b626a934233c50cfa8744. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/INO131300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7e2850c43e212d45f6b9acda1d324897064738fd02d59dd1396e800960770c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INO131300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58eb2d9035d1e03a4c10ae8a8462c677d1998b3d9343c02d2cfdbf9c5bc068. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:57Z), 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/INO131605304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a96da217a458e91cf05e8dea141c47d7fff2e7ed2b56913051453bae0f0dc62. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/INO131605305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b39c0aa22a495c50872e9b937ada66cb6e5e893f27cba1bcd329b57560f9f4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/INO131605307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c86b0b97b6f0591c82a4d43f05fddb5271bea22bc385b4e82781a92d29986. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/INO132100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a808567db5eafc337c62fc837b8f7b34059d11a0d7af6e9f1f512fb62c02d2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INO132100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759473c1ea93d2d467a3f5c13cb4689ad578cc5ca14e448ca3d07e97ce6a2327. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/INO132200270.