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 0x7d5ea0012d72367b618992490261b4d10f0ca64fa1ab6443d2bf532f913c9ea3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4caf3c4a-c5f7-477f-9ad4-c2a6d5dcdb2b.json and https://artists.proofprofile.net/proofs/artist/4caf3c4a-c5f7-477f-9ad4-c2a6d5dcdb2b.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 0xdbeb1fb37d592151566cc7593489eacd3677fc51d6fd20c3569b54a285f94250. 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/TCAFX2150430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde311359ef729bb82877d11d744010f3ee441e1980f8557a4ca52438893c9713. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFX2150445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e723ffc40291f1cd6bdca984391cfaa75d7aa637c0ec7eff343afd4ed14552. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGI2254357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8a0a7453efbbb11003e1ff855691247a0a8efea6570c6b6a688795f1152c6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGU2352521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a1d80b631140ef461baefea8eda9c1bd3efb5d8d4dcd216378bcb69d77c064. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHB2387254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c79bda69d660acc7d36e0f7feb6d02660a5413a5f14fb1db5deffae8bc1f6a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT2HF2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033274a7baeb52c37b9851c3ac0c7724c2448903ede79a95224b295c8778c184. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:48Z), 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/QT2HF2400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62cb1625392061c8fc9917b8e55be6bbfecd73f3133b2a20065c8416a4c1a73. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT2HF2400718.