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 0xd67abab60420d2a880f68b90eda31425009bed3c59b65ecef242fcb6c7bf5357. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7efedab-13aa-4155-8add-9277d6b0f6a9.json and https://artists.proofprofile.net/proofs/artist/e7efedab-13aa-4155-8add-9277d6b0f6a9.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 0x8ed04e18f508c9d2c618c21e1cb3e3f0c0642520f77b255def0686c0b8439ae4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:06Z), 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/QZNWY2287514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd857a3c848df1d41918d9e9aca5be1899acd45502177dbdecbe36b505ccfbd. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZTAS2301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c304345bcee08ea090cbc8b2ed7d9cc54211bb1f716f1d453a63ddc5b996397. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:52:58Z), 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/QZTBE2393363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfa8f6560eb9b12fbc9ead90876c3c1c9621770c179d69e24ffe21d92d17d60. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBE2356631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792bb708ecc2a52fd2380a027eb40f0ed565ab6cd173c477efb5fa931876b36f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFG2364564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589a2d991b26fc8bb3c8755c094a9ddda332e1d91fa0beb1aed81264f5fd9206. 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/QZWFQ2362240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a7d49186f3cc209ebbea174da8d4e09524e0723a10e0d128a2ea5b0f373d1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:16:46Z), 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/QZFZ72437856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab8c91f8d7cd23343f4f3a45e2bca012e228d4e50a32367b34997fd36c09afa. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:52:08Z), 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/QZES52433862.