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 0xa20de779efdeb385bac022658d618dc44cadcc67a41ce2eabf78d4819e0cd972. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9e25eb2-abe4-4e7b-a8c4-688f9193855b.json and https://artists.proofprofile.net/proofs/artist/f9e25eb2-abe4-4e7b-a8c4-688f9193855b.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 0xdc2a0eb8f97ca02346b63ecb6a25e4d50ba54a616419771dc8075be208972222. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QMFMF2233965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b2d07a66474df6af331c0a63216e2d43f75df9375624630eccf73cc91e4e88. 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/QM4TW2390993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df86cd1532111dacd7ef572ba26256bcde352850b976223b98bbd03f9472fd. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:48:25Z), 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/QM4TX2339848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a460e22c2a5b296580e97443727aa5a52a9b44454429b28f2b31b31859b6baf. 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/QM6P42306075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b9d383359afcc08649d575af9cb84443dee073814560b98369b8ed50dd4902. 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/QM7282323884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aa810416c6c11b8563c18f655d2df5b268c42c004521db16e1970e0d72e24b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:18:46Z), 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/DGA062408498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583365dc57c62772158e79e25a4fe09f45f4f4bd17ba0eef0370b9117d025d5. 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/DGA0R2467236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec051166760111c33de6b3a448eaa5dda767c9020f25415704bbee6f817617f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:24:29Z), 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/QM6N22592871.