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 0x3c6bc0a8bcb5c2c118e1ef8c63e88ed31750eceae9ae2c19ac4c8794b7542701. 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/ce67c38f-8dce-4ce2-bd8c-2a3c70d888bf.json and https://artists.proofprofile.net/proofs/artist/ce67c38f-8dce-4ce2-bd8c-2a3c70d888bf.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 0xe9ea2d4dfbddc80355690bef49ce3c7e5ebf03e300249be527440e8c7cc02d06. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:58:36Z), 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/SE5Q51821741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8183f4bc3dda562f9420d1b64bb6d5a9a1d2139c0c18ee094b592e1f54003869. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SE5Q51805324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d26bd978fb46df6c32d0f0dbe039e0b1df57ae244699203fd3a2e84d3d4d343. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q51803252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f1ffd5bb6e73f1d435581e80a2dbf0094cfe3171480a92dadf00a0fa2d6a8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SE5Q51812297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5976c6fc95c569e4732fc9d8ced8755294f123738200d867bf305dd7bd1d8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE5Q51811894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e3babd9f0a3e6a49fc026f3b62fb4e7413bd53d6160beabc926bdac56ba06. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q51821969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33025f6944d009157a6bd30e7ac454ca4698723cbf5bdae55772d333111e1acb. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:46Z), 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/SE5Q51812153.