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 0x5c9eba926b4548ff182613386d61e2641a56868cddba5054b2d803c7aed9b7a7. 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/d20b8204-a2a0-4de7-a243-cc09aa87d2d1.json and https://artists.proofprofile.net/proofs/artist/d20b8204-a2a0-4de7-a243-cc09aa87d2d1.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 0x834b89ec20b5a2da9529bf546e839826472630b68eccc8ea956b9dccf9b0b4df. 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/TCAEB1966827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b89ec20b5a2da9529bf546e839826472630b68eccc8ea956b9dccf9b0b4df. 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/TCAEB1966827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d2a4e5506ca6aa1dd60c3a7b2c24e342fe1bfd51c2df926c47cd8e451049a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKW3Z2203207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235eb2b1e337de0de166274be3c0620e43844bb666abaf7f094fef24cb8572c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:02Z), 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/UKW3Z2300676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6295cf188829cfbee9abb13b374a0fe9ac810221b82c4ecf944f9f056c7b2fb6. 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/UKW3Z2300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d3dd93b58de1500c36f05efb18fb96066b3c96bad016a4473e6d9e8ad2d7c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:00Z), 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/UKW3Z2301259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0fe68a8caf06d142b7ba864946792db0432dd251492bee88b3ed1e6f9acd37. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:39:02Z), 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/UKW3Z2500391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4274f481604c9773cad24095a6ef855d690d9fa1c5b50afa4d2a500e4df5eaa7. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:50:05Z), 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/UKW3Z2500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaafe1f2e5b1192222ccb2d29c3b38493f7c517be3d0627a8a195a1c320e0dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN82133649.