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 0xd92802fbc94c7671cbeb2742834724d3a0b98cd4f7976c7f821aec1eec435606. 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/d4b9cd4f-195c-4d4c-9df2-cac12b7fdcf9.json and https://artists.proofprofile.net/proofs/artist/d4b9cd4f-195c-4d4c-9df2-cac12b7fdcf9.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 0x39a3b453acd1e26b45e7ba63d4e3d081940d244408422252f25828f2f8111710. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:03:53Z), 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/QZGLS2496228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5759427ab2d5d69e46d9b094d10763a89d06b6fe7d20a61170919ad6c06d05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2402613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3b453acd1e26b45e7ba63d4e3d081940d244408422252f25828f2f8111710. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2496228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364e6cbf163aa8a5f835475ef4f9c4afaf364013e1a7f6deeb9ee0d4fcf21eb9. 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/BC8DD2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a424a5b576d2403f3cf2f4da34a0363bbcc01649f559e9a1415fe11c264c235. 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/QZ5AB2448500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48853fe810009295ec283bab403066543325e6bbc52d8f3529bef8a4bdf8a2c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2492564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b931eaca5230bbe9492a3e73954cc84747fb24f6a9ffbdd77a7098585cafb2. 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/US7VG2482126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eb416bd34d85b86b35a48c27e3b76a5547a3bcaabf5e998a5811898f06c13e. 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/BCNWM2100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e990eb3636c831ed6594e29f59120cfe5b4033aa58841619b0a07cbdaeee880. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2368578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62b6e18c8ffe9ab5d47d26df3abf0216c82c295566d7f1486885e659ebad10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN62374609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321132861b48582b1363c06ba8a582203103c8b29e07fe60e66ffc1d76d0d4ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2343078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6bfc1455104a28f0737188107a9ebaf3089ffbb12f055e33d71d2efaa524d. 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/QZHZ32233709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a84b6149bbc0ce5a57fde6bdb251e8ecd328f295986e8e51952ea84e2c8d6. 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/QZ5AB2283770.