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 0x775435a24a83bf299d65dda7bcf14ba37bb31ce74817dfd21b51bb4242b924e1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/460c6d6f-6708-48be-b8a5-f9fc8fcd0fc7.json and https://artists.proofprofile.net/proofs/artist/460c6d6f-6708-48be-b8a5-f9fc8fcd0fc7.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 0x948a1600a00bc6bdae47c548b8fece4724eb2d0d1b0371f65566cfc14f425282. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA72168464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60035251938d7737804d84609b4e6585e24f46bc6ee156d16a794003754bd3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6M2145890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b1fa2b69a385aa78862113a6759a01812a2ec8ac7d18444a8e06b4fc213747. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:50Z), 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/QZK6M2145892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371ead1e173e9c5f6e593cfdc80f3538a563b4b5e665485216f59589ac217fee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6M2145893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b534016a866fab119808a99393f4a63217e1492c7baad5fb23855362ce6fb. 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/QZNWT2182108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1263b3a68f0b1c86542bfcd2e65dc1dc7d1e41a781c433857b1fd386e7b130. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2244802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7020de51756bc882cdaf6843a344017938ebfc9ce9038eead35770d897e000. 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/QZHNB2244811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1263b3a68f0b1c86542bfcd2e65dc1dc7d1e41a781c433857b1fd386e7b130. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNB2244802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d4b4c49ad4035818419fcee662b4d1204d2c22e7ce0d694d5d08d0902fd93f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:22:59Z), 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/QZWDE2338480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058bce7b44c1a8175e538849583ac69c3738336cb7cfb92d6feff0199ed2a76. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:17Z), 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/QZES72290667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20486bfdf0e8a98c17adb5efcdd6b0619dbc0b7380b84f6925e7af3b3fb7be8. 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/QZWDE2344188.