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 0x9c200d2646ee5210bc09b8f452f15b68184b423dfb1244d8d882912257bc5c23. 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/639134bb-d08e-4515-a4d3-097ec5af3770.json and https://artists.proofprofile.net/proofs/artist/639134bb-d08e-4515-a4d3-097ec5af3770.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 0x5f84e033bc8f32d0210139beee8d63f1785d99ab4c91575985e1e5ac0d651c3a. 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/USTCB0937895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9984f91c3a0fa65daaabe8a8ff75f52ecb2fbfe626f50d810fed7d149ad0ee2f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USTCB0937903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64023a00c2af4d3045f33e0007022a9cb401bbcdeaa1630fdb6e3f8f941e0d53. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAFC2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e37a5c2106e8e1828c9e582d86c17a3e6dd32beb0920adf7065b99136921db9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:16Z), 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/TCAFG2082365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6a08179c54f5c63ce3fc3e98eaa0a06262d89a7ee2ad27720810e38af84c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIM2431884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb682be5f5f8632ac8d0467fde44d51734336b221562151bac53739b5b03583a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIN2431893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2734c7bae94ed43191e66870cb1fb5a1db4d497bf7116434f1db76e7aac790d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAIN2431899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe730da86a66ef405cb4b8c36d6ff170c7e41d6924af0a8bb050ee6eb92950e31. 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/TCAIL2431902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c148b738f86a05af6ae8f2f6fbaf4cb400b72428fe5c2364143fb7592dd8dc9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:41Z), 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/TCAIL2431913.