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 0x533b6f2e306c9084cf9331d1fbabec7ba113aa56eb5f95dcd4b3321c9626b940. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4468c413-71f2-4254-991d-fb8276dcb9b3.json and https://artists.proofprofile.net/proofs/artist/4468c413-71f2-4254-991d-fb8276dcb9b3.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 0x1f8fa506e6bb6c72a2f04e36feb00883927fa26eeb42032e24fa6d275f5572d9. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/RSA221601025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382c69ebdffb977f50d020868553a33b939e01056b185b8202584ad5128fc20. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:39:26Z), 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/ATAJ12200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b328121dd126ebb6cda3adbdd61c56e320f3f2cbbc821ca21d018cb504e5c27. 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/ATAJ12200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfefcce8fdcbbb9ec9d4a822fa7abb26536854167b1a19b3615ec3ffbcab0aad. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ATAJ12200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe264ac424359feeedff12321917522ae0026f688578c7f8c44e1c1e9b1ca5099. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATAJ12200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6ab44fd916f4ec9e1c023f2aeaf40749bcb41fbfa054602dc48ac69d9c3df. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:02Z), 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/ATAJ12200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0969df47544dc8efc0af65366d0e09416645e7ebe4b48ad40aba38d394938ac. 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/ATAJ12200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c86a18f10e9bd7615a054bb7b410b37b9c40923e749e17d2687eb8ee69059d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATAJ12200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ccd5d19f7154b018535973b3a0d571a136449616ed1f6166bb0e3f1275998. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:42Z), 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/ATAJ12200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa169ec23168243cadefbcf8c908c72b6f90e957b646ace7b8743ff6a2b4d7b29. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEKB72411099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189e5e4725412b08819985fd05ad5ba3b1556c829c6c8a743866034a2cceca1c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEKB72411666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0294fd228767404291e53a2de4e593c3b56b7cd6061d6a746dff0d8a473b1d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEKB72411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa648b12fc8045989604fde105e6c725d3f8365421193ac3b399f31d8a2f18770. 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/ATAJ12302798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae35b8c884ae6de18aeb14e689af98bc7eae511f3ddf818b23858fe4b4191e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATAJ12302799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dbbb0a515a5a5f96af488dce594f7dac011011e75b56504af7ad1cbb886a4f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEKB72452150.