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 0xd5c2678414ef6309fce21f314117a499e88ceba7e0b3c24c907003f98aa6050a. 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/8d56a43b-0104-4c89-b3ed-b7779e20e6ab.json and https://artists.proofprofile.net/proofs/artist/8d56a43b-0104-4c89-b3ed-b7779e20e6ab.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 0x80407ab800bb3101e932044510025949193ff5e976f78cc310f6ea551fb3334f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHG2353497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e5c68243cc2f91f6d483f335a152600e461f4f7908316ad57fa34f28ccd17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIQ2406569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a6b042b8c05504f1dd0cf952c92490f21cbe5e1eedf8abe787773919d5cdcc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:25:21Z), 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/TCAIQ2406510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1b0590cc356a309a81d4129cf47cf5903b7ad30de2adeacba022179908d932. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIQ2483953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f8eeca9769af561be5b766d32f81f1af5a6b7c4d96c927265b9ba9c74256de. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIZ2402806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa85ab5a9d8a8a3cd5fbc3d79128831b56be2587ed60e3ccef773a454169023e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJG2539718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe80ab71634d6017e9ebdb0cdbc31f812cc870e45309dc14d9a82aa291562856. 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/TCAJJ2503449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f7df29fc8ee60ff170e10abe9ae6a4fd4342634d71afbc3b10f03a17b7a5f4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAJM2546702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825868d5abca13fffa63ebe6d6cab571cbd722fb96f1a75d3cf3df461542a057. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJM2567043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc45af463f1f958cbd5cf3319bfd5f116354cc3fb0ccf850c1f1f0591a9c14f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJO2531459.