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 0xa43f982eaa6e230015a1921e4ce1c3c3039b858058f1657d94f8e2edf81f9d4b. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/445e2873-9796-4f22-80bc-28acf2bd4385.json and https://artists.proofprofile.net/proofs/artist/445e2873-9796-4f22-80bc-28acf2bd4385.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 0x6e7b4b7132302436fb39c154e5f4aa19d2136f905296fc7e06cc6958df563a57. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:40Z), 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/TCAJK2597054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6a8194566bc0bbcde13e50c3987732ac3b1a8e205f2a59e04afdf59f9fd68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJK2597208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cafd9538f29d481efa75a4ccc33b2eab6b61112f2f7a969483e27586637a4a0. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAJK2597159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab224ed21c77db5255633b46b5393a2a1ad5c6d77e0dc235cb342de805a235. 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/TCAJL2527615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6a8d91dd4248385bda9c0a73128f7ee171abfd5b492230869e1fbd86a1529. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJL2527628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6df6d11d4200ed7a1a5ad5a89000e8806ceaaacee17e62ff8c3da7045fc59a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJL2527594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611edc4800f47d4fb68d75e45f1143fb88d1c519acef532088991768f3015c16. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:33Z), 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/TCAJL2527648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2117d8fdcda0f722ffefe8219a492264e08c9094f3fc28316f45fd0f65507b9d. 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/TCAJM2527776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97cc56d96f3c16ad5c2ad032b072aed71f993b24bcbf298424d131e405168c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJL2528801.