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 0x507ea6348c2065f782955da9cb09706a71eb153c86030a33ab593f3288e1309d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff481f40-f3d7-4fea-a1a0-b58c121edbe8.json and https://artists.proofprofile.net/proofs/artist/ff481f40-f3d7-4fea-a1a0-b58c121edbe8.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 0xe1059dc1836448d9f62611a92575c4f0c3970bdf7cebebea1472f46bfa548b84. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:44:45Z), 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/ATKD92350101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675aa985dc24cb3b2148d500bc1f2fcd6219cf6df50d20e71cd5e7e363d3b599. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ATKD92450101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f9bc8a7d475d1f87d0c7af4cc1d6f5e6c5e45dff99ddd6890a44ab766be8b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:54Z), 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/ATKD92450301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efd4212bfbca04e08d771a9686bcbdfeae7efe53476e5395d4bbe31bfea605a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATKD92450302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fa2c2d3c3c09cf3dd7f98260ea28e3e3e702107792cf8250481438910ffdf7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATJK22501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbfb0c83d41837bcc484854cb4bfb1aa9588e26698ff28cd9e14ab3a8a1491a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ATJK22501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695fbe71cfcda4d764f2f23fb27ada0e709d133480816daf666a0f96aaa36c7. 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/ATJK22501004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac537f3467d8afe58eacd158ab23e036275949a151e2d2f16406f342ae54dd69. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ATJK22501006.