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 0x629df4764e1f116da49969aaef0ff692ba3f5a00b8500f72a2ba136024a3e152. 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/e088c411-dfe0-40ee-9016-3f995934f8b2.json and https://artists.proofprofile.net/proofs/artist/e088c411-dfe0-40ee-9016-3f995934f8b2.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 0xbcf710e696bd0db53195da097e229b0bf337a6072f2a5a0c7ce6761f37fa7264. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKVK61700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b9a0ecded6fddef9d6861f16ef899ed7ff40a644727d95d3d9fb0344b723a6. 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/DKWC31700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d513844af68fbdc548e6f0f3d257122f0785e59e883377a21b498b11bd3924. 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/NL1AP1980731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25b73e73e94d50acac96eff488016ac5611987ea4bb88d67b7f14b49ccbad85. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DK7V12000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046136b9c9619645d4c9b95ce26a5af6244b56117620bcc4c4dde11ec52b5d4f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:54:43Z), 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/NL4NL2178392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23eed315e40abda0749ee62baa7498ab4dd75fc751af5f8daf1c3e2b3703a0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:15Z), 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/QZDA62414325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967ef1e6ae0abaa5e5f8433fc5d58c117aa68b9eabd219737d35f8b8c52ae88. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:06:58Z), 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/QZZ7K2491430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf7ce081d931e16767d5b8ff2dc1983905713e9d36fea4348f280b7c2e659a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKA451801304.