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 0x0970bed448ce00275ec93e54a82a615e3887c34e09d4725570c2e9d7599522e8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe64a714-b04b-4c8b-9b9f-e7398ab114e5.json and https://artists.proofprofile.net/proofs/artist/fe64a714-b04b-4c8b-9b9f-e7398ab114e5.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 0x5a64305e5dffc23950925a2163647fd9ef16177e8bd3c24827eb514c59abf7d0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:27Z), 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/FRX452109988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3e6fa0461774de91e3e9adabc722a2fcd70988a061fd4b5cba69ec04bcaa61. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:06:39Z), 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/INE182216055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d122e8cb5345e4fc747d6928323b12226b348de5a6308ec16d5e6572502c0a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/INJ221906542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d985115f960aecda367ff4906b8e7c21cfebdf58df5351f2ee5c782ca3aea. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:04:43Z), 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/DGA052348557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5775e2cdb5a7a278009330b2bbd38cbab02b92faa3bae5502b048381e6ff3e37. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/INC622211915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626100f63523714280525770ff25df9d8446a2b0bfa88ef90520c743b9dba20a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X2437076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d048c162fe47757293c3ec5027dccc443758c154eb69074cc93ac9655d011. 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/USA2P2416786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99611b5cf07a0c27e4097f9454fc1f3fe38d5509146307d946848c30db4e2c5f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA0R2420130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714b125584e343bc96ea956c9a2d949146258d7966ea47fc97fb68083024b02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42553877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e66f17cf07805923e7a48aeaf21a88a91a684dbd89c028ea2cd8de9acac3508. 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/FRX202588706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fdceed302c194bb670b7caa6e6614f5bb7e98dcfb4067b2ef7947de44e8ead. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN32482970.