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 0xdd518f49117750e8877bcd8ef63fa1d0dc004d795b790725683c87b059c9513b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a1e784e-e189-4a34-9ba8-95c8155d3787.json and https://artists.proofprofile.net/proofs/artist/3a1e784e-e189-4a34-9ba8-95c8155d3787.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 0x1b7647c08f7de3c2d108dfabb57f8bc7c4501ad033d9205c33ef97aa122761e2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFZ2257847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb023898924f451e23a7bca14b6abcdfe5dc20e1bda44838fb2a8c4bcbebac3b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:55Z), 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/TCAFZ2257863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886448c669429cafe8a44c1bc19a3add17372cc62bbff091ad80990ae2b592d5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAFZ2257869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dcfb774f2405436c083518887cc7c2fad35fa47320ea2de5095d0d14a39021. 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/TCAGP2269129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ec4ed1dde6ffcfc332668cb08ca269c585832dbf184028442568e2d409fe4e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGS2365790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb91ad7a870b3d4455f48980f87ed9340602d45e7b9e8b72a091baaedbacdcbc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:44Z), 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/TCAHI2363617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48939bfa3d8ad715e940fedc070ebfd396f8cd25efe548a8be089244743733f1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAJJ2574101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda807d10ba2f1a59fded900f70777e69e7f1f97d1acba448220429c1dd1df3e0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJQ2549178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c1f294df9dc162f82012828b7a1bb0690b693f388e3a37fdfc28cc2bdaff42. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJS2583616.