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 0x28faa366edc00151e5748bf659bd2d48f2ca2785f177ff29428e18c4cd60b06d. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6434e8b1-5d1b-441d-b752-ed7da18400d9.json and https://artists.proofprofile.net/proofs/artist/6434e8b1-5d1b-441d-b752-ed7da18400d9.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 0x5d2d931d27a6ac1c95b316bf327743a0ce9b6a9b23dd25427fdfe1799ed3f635. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJA2449893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bcc206a2e50aa165f9326e0fe86cf1d8adefbefb525812f42c787e8728d2ba. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:34:02Z), 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/TCAJA2449924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d545d44529ef19d877b905e46d5daa61b5c0851aedcc9b237fa8ba43037aa0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:51Z), 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/TCAJA2449650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0bab20e9df88c8160f659df8cd666875ae8986c2224f14159e9bc17dc93bf1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJA2449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd29cda7c0fffe2fa5ce3bc4d6cc5558d6133d57ef02fb79d1deab51d9d7e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJB2449836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10448fcf21a0993a158bc6221181c35d1770a33c4f44b09370b8bf241c1d490a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:32Z), 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/TCAJB2449760.