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 0x52c211d17b997b50131d00b3414934cc782cfb10265fa787f56fda8fb4d5564f. 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/ad267968-68e9-4223-b275-b9aae1e66f55.json and https://artists.proofprofile.net/proofs/artist/ad267968-68e9-4223-b275-b9aae1e66f55.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 0x31685e97231bdfb1297187c03fd74fdfd2af340e29b2857ef5b224e522f8f290. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLE871013601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144136f6903b9c77c53eaab9b5b442a9546f189b5efd44f381197dbcfd01801f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:52Z), 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/NLE871311901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb32857cd7b06c6be943086311667f0cebf1177b0366eba53cca9a523313c24. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:25:26Z), 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/NLE871614301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a686b3d7df5a60b2a1c903fb517000404f8d0008b2826252cddbf2b32a7483a. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/NLE872215001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0f9c5847113149264fd84ef0d1140ec7527fc7e113ab58d2cf30f5389ecf3. 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/NLE872222701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7b8bf15cd9f7dec5fdceed2f5f05dfe80b39214af3ecceadf471f3013bbfb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:32Z), 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/NLE872303801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598a83c1552d446cebc7e39a4b5f14f1a745164c219663f5a972c91d770f2621. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/NLE872410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba80baa68c392a5ad60a9efc2ddfbfe8ad845aa71a81e746ca91c10fc48ab1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAY362200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda15d8183557a06ca21a6f5121ac0932b09373be631e13978bbe30dd99fd99. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE870637001.