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 0x832ddefc6d56c5c216dc7d6d6432296eb1d8fa6034af1f38af87c120cb9d6c9c. 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/f82788e1-4681-4f0a-8e77-4fa7f9f45b2c.json and https://artists.proofprofile.net/proofs/artist/f82788e1-4681-4f0a-8e77-4fa7f9f45b2c.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 0x19fd840824e969441e05a228383009fcf0f5b9fbe50e11738db1e43e2bf01260. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:10:02Z), 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/QMPKX1880997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12230f3857bfdee81d985eb47bae6434b6340ddea7bcd1b75a813b998c7ff75b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMPKX1881008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c944100ce35ad86898a8ff46768f74485abfc95ea5564cfdc8aabec9617bd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:44Z), 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/QMPKX1881009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c45134c289d7ee1bcd9c7c5ff904f9b68a9541538169bec84fca2dca8d343. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:35:00Z), 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/QMPKX1881011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052e515169874a86df9fb654c66136a235fd01a2c4c99d9b5cd6ab31688028a1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QMPKX1881015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ef7902e2cfc8dd9de6d1e3e9fae19a503e8173560318937cd0d052ef794d9c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:17:22Z), 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/QZFZ22001302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eb7380661a5a22c1f44a50a602b5dbbe06b5678841468b6d3336afb1a6d887. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:05Z), 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/QZFZ22001304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611bbecde2a6b163aa05417e73dbf1529cd709f28f2d5b94dc5bd5c93dbf35a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ22001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534bb5fd471436e1a93696cc0b6a17176a81439b81ddb2e4373b77ae0eff91a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAZ2206914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7cf937baf526578d96791a1c057671096e028f40087b82d700b08273d3c1d. 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/QZTAZ2206919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c35ed1c93618f9bf38024860ad82ecb302b29919eec3225ed97176f9365b8e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72558748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218492da836b5aa53f6456637914b15f336d019d72cd8ebf1c8b01a2792a1b09. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWZ2579379.