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 0x7999bed5a2e4e988750a29eeba605b997053e4391466cc331dbe7f5cc299073e. 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/9bda8e07-2bb0-451d-88df-422f8d13424b.json and https://artists.proofprofile.net/proofs/artist/9bda8e07-2bb0-451d-88df-422f8d13424b.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 0x31cd5b967fc3035c6204543babb80186f82b4def5872b7dbfa7f75ea82fc3ba6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:08:12Z), 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/NL1DS1821973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd388e5c83c99481de1395e54dba13218943d5527deafa1d89287c2a9b7bf8623. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL1DS1823351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9246c2eff7794fd4407b0bd60f48744b3613a7daa8070d4144fd454971369fd. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:10:24Z), 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/NL1DS1823810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7986d7ed4d535f76c8b71d998965342d38fa7d72e678ecd5681d2fd546f8bbfa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:52Z), 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/NL1DS1925275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519420e14206fd93df60c81bbe6bd7fd00cbc988276416bb24100d62b92d60dd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NL1DS1925276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee744b705d7ba9c3803d990a57db577426f9d50dee9805489b6da2967e2098d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/NL1DS2000568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d91c4b4dd82e4abe38c757411c15830226a728072bbbdd1bf2206c10329615. 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/NL1DS2002670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec72f4cf52ce6474075957a3eb33eb9adeb66aad11b1f1cd01dd65d1d9e05dfe. 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/NL1DS2003451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f6691bbe5816ae7b79f39d9ff7b16bacc06f528c1c9e49074fa41e4d6ef3df. 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/NL1DS2003456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095dea3deacc5f5012aed2ed03b3972319d42ca3c0c266e7b9e5aa1ceb3f77d7. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NL1DS2003457.