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 0x70a7e4c29cd0025f4bcbc44a3659df9e55bae9c5ee25f13ebf83c48d2da04ea0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff067aec-a955-4b50-bf27-4777a259da94.json and https://artists.proofprofile.net/proofs/artist/ff067aec-a955-4b50-bf27-4777a259da94.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 0xceb02db82244fff5547c8d8676116adb4b89554a163159c6e465147471e36017. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P0731139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a7be6370c36b8d85201a09bbb6e0b28f504cc717dd3d496b03a2cf7e85ade. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USA2P0731140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf740d6535d2277fa3be0c4466271f62ba0c6efc577075b91ca8d22e6e2b76268. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USA2P0731141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef783828900c27c9ddc18d2166751352a90235a4e2976aa285e7c48631fc7c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P0731142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba9903b339ce77c586f433736c40d385e55b1ae030d92e1c672373a799c285c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:16:36Z), 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/USA2P0731143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83556b74e0cbb92c36ffcf6be20d5c5ad514d110780059e05789f0eddc5c5f02. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2P0731144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e60a9e151ea3e3a21cd5d89c753825f2d0832c6ef1c5b05296c874304e00d3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:43:07Z), 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/USA2P0731148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbd6a49ba066f5ccc62ce401b6c0ba3d192816ca992f7b9cf401d48dc709a2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P0731149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e16a029aacc45ba4be43b9221e0466687b18e03c69325ba7373214b2abf64f8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P0731152.