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 0xde5fb522f5e46f92f9d068272b66243a0a43005d62142b4465f13a5d5d1c8b83. 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/4fd44580-8065-413e-897e-1d0c40df2389.json and https://artists.proofprofile.net/proofs/artist/4fd44580-8065-413e-897e-1d0c40df2389.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 0x5d5a89ccc9797012744dd5e6cb45b2b4bc405072104d3a0856758d2362e39c93. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QMDA62155890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dab37f353ea3f1ef5136b7ffb04f3c630234e1625ad2cf281bcf40e991c354. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:58:10Z), 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/QMDA72129295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8202a24673ee832f4ed856dfc63bdc7635ebda29c60d2f657f5e57a55b9028d. 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/QMDA72192275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2c2a0005279f86c3ba7833efc6e474468b1f683a15731b0b5ee47e341cf6a4. 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/ITH9P2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec1273c1a40f41624d0d014960bdc8a4f0986aaa60c47c7bb046cb7dc48e717. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITH9P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e751b002c734de953d5c2998fe490efd6130335150d6b85c0a75a77c889f19c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:28Z), 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/ITH9P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194b6d8811f52546648b9e0727f4aa5b18bae88be4d8d8fd03d3e4709cb59eb4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITH9P2400039.