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 0x0e7b3138a6d63e9d622fe3e9fa75feec0c75d363fad6e397222674a2bbc29a46. 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/7c5ea370-cea4-4eb2-924f-08ed2c9cf207.json and https://artists.proofprofile.net/proofs/artist/7c5ea370-cea4-4eb2-924f-08ed2c9cf207.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 0x0baf277f69c929a980f6d8e500fd48aaec0dd5513ec2b4a0839ce861086e07b9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:08:24Z), 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/DEND12240001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39341036fe1e14f7dfe29c9b8c262da302c968efdddbbb1df895609042dc148. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:19Z), 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/DEND12240004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50acd5f3cdf1e34f0ef334a7c03ac437d4584ac9bc15d6cf24c4f3e9ebbc4dbe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:28Z), 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/DEND12240005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc132138282ede7aa5b3b2f8dd779a0f7c2f93c8d05f155acb00777cecc9016. 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/DEND12240006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c2364795a768107e857fda645424f9326d0815dfcffeebe1038a783258558. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEND12240009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa9188af92c3de5876deaefa6ab2b41542d1ed79ad60303853855ab4e3a631. 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/DEND12240010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e0ed13034449b5f67925fba37383c9ede51289728b44ee94256b44e0fdb96. 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/DEND12240011.