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 0xe8e97799a703f89040bff7a28d03a80c44f79c7a89cc117e03b9da24f25c8f71. 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/194d6aa4-257a-472c-aac5-4b57acce0b98.json and https://artists.proofprofile.net/proofs/artist/194d6aa4-257a-472c-aac5-4b57acce0b98.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 0xda8626543e0c97bf159a81902718257766378bc9ce4d98440ffd9feec95c56a9. 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/QZNWY2069898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dafd88864a34ccc4eaca8b25c1ea082ebbb92eb0ab214253c62183632439ef9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882236463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2210f582271bb1aea6d1c6ef86dc5374ce180863f188f6b5b7d3e1e8c3cebb8c. 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/QZN882393902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d163a4357ca839541255d64d342b2447f18109f256043cc5d9b2aa357331c1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:28Z), 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/QZN882393901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f3be8eba5df814225c5057eee1f6c5c84135384891464ee741607bb101e8ae. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZN882393897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10f91958444b32bf2c75f98e44e50fb30a6dd270e64f89c90cbe0f4b4f25bb. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZZ662328898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddf460edfb6f384da2d0e636e45bac25e3acf3e823c5c379bdc93558ed4f17b. 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/QZZ662342740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2bc298c951b9e915228dee34392d935831422d6f95a801a262d1b9c78ae12. 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/QZZ662342741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10f91958444b32bf2c75f98e44e50fb30a6dd270e64f89c90cbe0f4b4f25bb. 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/QZZ662328898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a91b4a27d1d5a366313bb3f69e6199b3c4c07446ac18d351f1716058bdcb3. 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/QZZ662342742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27620495be5a5b9aac0ec3fd25388e5c4c9c9d275fbf3cc94de0b35c31a02809. 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/QZZ662342743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcae7555813f0041543aa03fb3887e876413bb6a444ec0d02ae85d293b70ec. 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/QZZ662342744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8d368f44bc99778751b573a4051159aed8d3ad8772fc8c40c5f4089b39e80a. 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/QZZ662342745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d6a22ae020cc62130f02c3ae54182c4ff505051e0f1af17b1aa873900d4929. 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/QZZ662342746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f39fab034fea71e03f522fab1915b538d014d32e07c5ecdb82c5caf5f6641. 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/QZZ662342747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa1d4b831351f013aea1d6a3ea425d9a4f2d6498d001ce3990a24c22b22a841. 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/QZZ662342748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99d87e60f1f425f518e3bea034d6eb768a789d5f1b721b0df34fb0d4eac616. 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/QZZ662342749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023fceaa3e1ad2e35b5c887a31687f0dd768209ad57d65b04fb72bf10cce11f. 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/SKP592400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952d02347dd845fce1cd05131a5c736bb861785c149a5a9aab723bbad2d7b60. 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/QZZ662492273.