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 0xedcc708e6459d3039d449ba5c4ef0691591ba67ab40f5f9c38501f24039af2e1. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a3fd0fd-699a-433f-b725-4885f6c0e3c2.json and https://artists.proofprofile.net/proofs/artist/1a3fd0fd-699a-433f-b725-4885f6c0e3c2.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 0x65b8f5e4ca4af87bc3c1cb845f5c2c1ef77ffb5f4d173f46ad7d198ad28f3dc0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/JPB602404000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b767220c1c85554de170e0b2fb76179cfac9cf3b4fda0d1915d9b8c8b0588. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:49:12Z), 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/JPB602500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f2cd0089c8eb0227668f31d7a68f341458c53d79119e108769d3b7d4dc5e21. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPB602500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738e8face9160a6f5606ab4f239b01ff12cdd41714f9d54276ed687b22547bc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPB602500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69af9d3203979a6a5ee04450a73b8f500ad38d19e4aa2148b791dcbb219a49. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:36Z), 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/JPB602500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc7930037cd0168d7a1d46cbe2655dd8c1e7ff9a1f43f7a947621f2a9884117. 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/JPB602500128.