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 0x369ffb0f9e8f290e71d0430a48855cd2f8cedd8dcd6c66d79ce89d3b5f2f85bb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c853f0f0-15e4-48f4-b2ad-4ea78d468707.json and https://artists.proofprofile.net/proofs/artist/c853f0f0-15e4-48f4-b2ad-4ea78d468707.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 0xaed50b8c530af8cf2673c07b8921d64eb9344af529594ec8b2c154561b3fd313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX851801386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b1afa76fc3a856aa71d5c6a979d3649b5e1147ad869b13fefbf996baac69a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRX851801387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f254c1e3bcc5011e1cd4e778b3aa6495a9b42125d3d37fdb3f1016d688319d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:35:02Z), 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/FRX851801388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d3d35024c5492e0f1b5f9d85a4e6ecb6b51a0874cc0c1b6f170fff9fabd04. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX851801389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7159d29e041abcf691fdba56065800f164ff7f6f3c62d76e8c0201ec567c814. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX851801390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b98b289a68ffbd89d4b2fb5dffbcd6163e933d5eaabe1ffe997378e9544c6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FRX851801392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e3c4814f1b03a4c9407056251cc5b19a4b16fe63f477f0e24ebfcae3a6f93. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX851801393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b71ccf389b37af952e8d3883ffdb3db1842aee235b5e126516539aacc2ffa96. 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/FRX851901857.