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 0x5d5696d87a8fa421aa57eabaf6fd6a06e1c37bd349a196a0032ec32f0b9aa76c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd4135aa-acdf-4f80-8377-fcf04b402ecd.json and https://artists.proofprofile.net/proofs/artist/cd4135aa-acdf-4f80-8377-fcf04b402ecd.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 0x215d54d04c5ab2c8199c0a4fe4fec111aae491ab0e3f9f8b01a8e1edd2a3d2bf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ING212349235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3bf5f518388a9aead369e81ceb52c34d578f413521b436c26b084e33d387bf. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ING212451076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed2d1654d03d91a0e2c899c4cbf89353ba15abc5f9e7e6aab10f975dbaff18. 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/ING212451657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d301c16f5c7603fb1cb9d4aeaac2e747b4b620556e85e6a5b53aa8644adca83. 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/ING212451659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c73e35087c37cbdf6eafb7503a0c16540004fecf669a0af3c093d3aa9c4321. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ING212452217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e34e07f983e0819598b20453619ea0f5100fe051f580ede510cddc2c20bb785. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ING212454239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963b031b4b0e719bde787369e0aed4ac5ce94c3635fad88f09f3ca03c877876. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ING212458573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dbcfa452f52e5b8d9db2678218b1394c081b50887c1f86614038f8a1cb710e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ING212459008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f61f3d616766b618f40c810d2167fc671dc9cca2ccfc8fbfa73fbc48788e79. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ING212461623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe880f567cae2cf84831edaf26046b55fc9b96ce14a4bf6c92550255c976ede1b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:02Z), 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/ING212461605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ba2ac54f03de38ccb70c143a9a62b0460f55b25967ad61d2cce976d21c4a4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:51Z), 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/ING212463366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936d1d68980a10b3a9f18607950431f72167ab14f856ec8964b3e5f670a37a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ING212466375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914db73a15b48f193c0d7ed804bc42fb2b1af666aee39924e5ee75870fa73d94. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:05:19Z), 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/ING212468388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4e0a7b34bcaf6dd59d06a19b863bf8923a44561414edaf0cd79fb0ca2442a. 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/ING212470051.