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 0x15f4149e0f44da206590fdeb5b780168aab163f71af26660a40c02d57e98778f. 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/3b047148-4bce-4cc4-91c8-a8c393e1edd0.json and https://artists.proofprofile.net/proofs/artist/3b047148-4bce-4cc4-91c8-a8c393e1edd0.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 0x31a0061366353df0d1bb72d24fea8ee2724170bbf50b6b40de2a10708307faf6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLS360900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7373400ffdd930c50e78b6ba3467bf504b780d07d2058ed2856df44509aea. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/NLS360900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b7b8f24a8ae190312da9e9dbbb4ca6bb22f7e69555a42e5c276e295f1c42a. 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/NLC341802001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9aa48a631a4f495cce084a2397fb57e4149ff6105e85d3713e25acb43c306. 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/NLC341802002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf4c94d8db29fe0d70aa23d99f19e0114dd3f0842aa9b7eb7a72f48b411933. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLE871910400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9ca3f5ffbe2d2a69532fbd9c623d15c17d393197757dd7e087e8774bfdd67. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:35:46Z), 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/NLE871915700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d4c4e77e32e91064aea3e1e569a4ec58859c6cad42f59131c3a5a897b6e3d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLS361900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb3c2269bd0b5679bdce6c1a3af6124636656429ffc71cf275ee574c11acf1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLS361900264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996dcd4723c494fe3007a43cd4ed82787a3db1e96eab44611c296a2196707156. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLS361900283.