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 0x3c37e2dab5c02ab121aa0628bebc6f5be5d8d4b7dc61036e3618006dfbdb53ab. 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/aac3ea93-06f6-47cf-9c5b-9e072fabf221.json and https://artists.proofprofile.net/proofs/artist/aac3ea93-06f6-47cf-9c5b-9e072fabf221.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 0x3a18e182fa7398061cf815e48f911d85f3ecff9b45007944be1062b3250e5c2c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52323323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b28f633ef3042eda118664c39dcb40509e5c146f2154e2c0fff52644541d2d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLRD52323261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f195b625636215f6e3ac38b2a4e27526b025095cd18631344fec312e0a8276f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLRD52024431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a314b08b6c4ba3f3e2a0e0123b6e924af31745891d00fb98d30663daf14d91a. 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/QZHN72201434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a7e5dd375b5cd813424174e0566b1d8683152eefe140d90c62c314c30c91a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK6821736175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e9f1ba43058afb2423e20f7a1a76247a2b7468a04790a075016deabc0182f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2429193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e9f1ba43058afb2423e20f7a1a76247a2b7468a04790a075016deabc0182f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2429193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c9fd8baccb35043ac17cf0b3b8fb55953b504c1090918741ae2ba02d3cebc9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2407630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36b3cbdd0587919e8a842d44a94cad0979e05279320cee860d87d023387725. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2431637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b437192dd0c0a7871fd22c576be034319f8e1d9e5ba5940ecf383e9c3fdc94. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2452572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76a750621f0b93955fed4ade2513f6078b59155bfbfa3610e75c3c5479788f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAY2317522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bc1c87dcdb4db2831f69e55268d15e0c4dd96b230b09502f17f08a89ee870. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52323289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b28f633ef3042eda118664c39dcb40509e5c146f2154e2c0fff52644541d2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52323261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e7c29d7fc2a8ae00d35640fcc5785fb1c1b1a0ecb42e6482c731b96fa8f5a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52323290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e7c29d7fc2a8ae00d35640fcc5785fb1c1b1a0ecb42e6482c731b96fa8f5a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLRD52323290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd076db9f7a2b438f5b63194d0eaee5f9bc8568d28dee6463814c7e76f49b0cab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP52180502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb0ebaa060740a435166b04f212b1c4c507cdd6112bd17e3f56391fbb134f25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42452540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468f84ff4121a1eed332eee8428c6cec452a01c33d268f95f4186e5965fbef8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTLA2457635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf763fa649dbcea8f2c2e30b6b51fcd443fbcf3f1e0ac66673b59188d748bf. 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/QZFZ42430318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd15ae9d3042f2be14c65a56e97350de3c131acbe25c0596a0e4978a3cbed20. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2436749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b21055d6fcd39290b1ced051a69154c76733e6118f2e742d58aee89762825dc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA62439135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bd261d841c304771486ea78b5ed7d74f8172813ad15134130cf7a2dee8d1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2436752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3b2962c65b6edd251124874fd6153fa729f8a93f714b9d5985eb70ab17319. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAU2357550.