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 0x1198b74c056844fab67ebe90cd41e4350173e1c2f201fa8f63e6f1091e2b5693. 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/e9f1550b-7e86-457c-bbcc-732a864a08b9.json and https://artists.proofprofile.net/proofs/artist/e9f1550b-7e86-457c-bbcc-732a864a08b9.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 0x53564ac6d7acb301fc401497f847cca0afd2ddab66f3cc4026d7a55e6389a9ee. 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/QZK6N2312536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aecfccddbb685fc4fe3e44995a7a5f704a461a818b99cf365e8cca168d64fe. 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/USLD91753789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53564ac6d7acb301fc401497f847cca0afd2ddab66f3cc4026d7a55e6389a9ee. 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/QZK6N2312536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45269e4f93dfbd9b01e7d4a5f3f7cf0f1df68583c83294088388f5c450036ce6. 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/USLD91754717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a5355d0ea1a4471d1f12e3e1c75dd3ca2ca660471239e4878e86be8a8eb738. 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/USLD91755423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea7fe8ba3017b0c31d00d5a43e67f1b14176c75c3330dc8b1e4eec3e11b2b4. 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/USLD91755424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591024a5370cb9efa778d7108caba9e2e7b2ad7aa99dec44b1c1c8e1e107147. 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/USLD91754522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aecfccddbb685fc4fe3e44995a7a5f704a461a818b99cf365e8cca168d64fe. 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/USLD91753789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd8bb230427b1d8e84c50b9c807d9ce570e61c22a270f5ead076d48022bfbf. 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/USLD91755426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1a17496a758c78a2f27939e399b2ede2561df2909ff5030e11ea6e52407359. 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/USLD91752990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36abd332d15c93fa49ead34c1f7e1129fd868b7f9b8363013fe89c0478430a. 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/USLD91755427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c26d1d05b8291bd748706e3fcd713c568f3bec55631d891c777c36f4c474ee1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USLD91755428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e92e90cc73db908d0804845b9f83d0d819005418500cb45e4ca3b8bc0acfa. 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/USLD91755429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774c102dd1f060081865c9e7725790bf601edf1cf3727603991d108054a6cff2. 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/USLD91750825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a24377a46ba43f6c9d7ede401bee08745930694be9b54362682978dfc8411e7. 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/QZK6H2383465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9ac6b71669d66e78c808443a3402e034e42e5930ad7d23bf900d63572d5f8a. 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/USLD91750317.