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 0xf59b94d1c5b8b311f5eca9a25b27e4020e27b37d62f1c76a64511ce699178c30. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfcbf7ed-7dca-4a2a-8cda-1f8a674ed0ed.json and https://artists.proofprofile.net/proofs/artist/cfcbf7ed-7dca-4a2a-8cda-1f8a674ed0ed.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 0x8e1cacb345857d0efad143738cc34853254010f9f24ef09a11f6baf4aadfa079. 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/QZDA82175840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81292b913aa58b92aad64484151f2d2b594af68fb9e596b29b4e698f4d8e45e0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:29Z), 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/QZFZ22208310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4315bbc9e9dea4431648f209a0b34a451c529c36366413c47138600f0b13e43. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHN62407315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c7fed552a1085cc3dd826f6eca08a5ceac09f28622ef7b5ab5c1334ac3e0e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6N2394871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4e89afa11c143e45cdaba148aea67018e725dee07132942e954f8231508f3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6F2340333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad86892dbec7bcb0f47d8929c856d8fef5bbafb997da699ed03040fe0692c4. 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/QZNWV2347298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a116a3ce61a2947ed4caf47dbb1437afec79edf1fc012d3737b2ef9bccf884. 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/QZWFF2319350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006f4a711b0e459210bfea2bba5531360e1e9579d9f229a6330d94300eae3f6. 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/QZWFF2319351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f604fa3e5e1d20e0caf1283e96ffd2e8c9b1dfc03e2fa7343f26cde81d36f4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFF2319352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f16a13e51de84b5a0eaa9fe5991d920b04b7a813455ef043327d300533df96f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHN62439298.