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 0x0eae7fa3c260f65995c7c88be935fa5a591979271bbeb136cb737629533a623d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e997ca9d-aa36-462e-9beb-6c7f2612db49.json and https://artists.proofprofile.net/proofs/artist/e997ca9d-aa36-462e-9beb-6c7f2612db49.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 0x7b94977f8ef826814c60ee6626fb2f08d087feb96301edaeb7675fbcc42ba832. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR6V82702515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94977f8ef826814c60ee6626fb2f08d087feb96301edaeb7675fbcc42ba832. 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/FR6V82702515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fc3812133d550fbbeb6d0379aa190582161007e7bfee2710b265d108de1aef. 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/CA5KR1960647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a62a4f6dca7174b20c413284c434e7dbc79a2324759506b0f6e07b496139ba. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:41:51Z), 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/CA5KR2071512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9880c6dcab9bc0d4b4027dee7742b44c775c264105ef25bb10492e26d86d8ad9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2396895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1522333d98aa538ea4afcbae15e6b531a1fd730e26b2b53a746c97ea8deea6. 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/QZMHL2415043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8977ad36710cf2d16bde921ee520ba25aa24dcf104810d2126a501c43306bae. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ES94G2505404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc4a837634bba4e47b2068b34247c6be42b7679d8e08a51f8669507097626f2. 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/ES94G2505505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837cda600d309a8375da6b405bda361c37a9fda21b26e8b90a9815f47920bb45. 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/ES94G2505606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7b6291feb7757eeea9867a8e35fd9e8d449af80bcb767a8e61d3bab79d626. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZG2X2419024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7c3b8a63089c3f7df7c20b4d1c156a131980fe8032fae01aa978a6e4031bc1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZG2X2407494.