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 0x64c9c1d3e48ff3a3d5cc0d7265e4340119f7c8233c15b6ddba7999d2fb81e1f9. 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/b1d167e0-5724-4f61-928d-dbb69c0ddf6a.json and https://artists.proofprofile.net/proofs/artist/b1d167e0-5724-4f61-928d-dbb69c0ddf6a.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 0xe0e6b60360586c550feb9b3c121ad97c99f6dcb0ed7cfaa0d50bded373b1adf9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADH1795144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3316bfca6a980db5040194f270c8b08f59d874200163d328496d63feeb917f7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:14Z), 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/TCADH1795175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06900587795ac7b43bd595b5fac77e23e11e826b5c151c02b1f789e220c185ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACR1668964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683315187edbf6dee95be639dad93716129cfc6ad2cc85001f15bd60b5a30b1. 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/TCACR1669014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59586c29756aae88da89f97d00bf40f3845447d4eb33894d5783bbb627bb362e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCACR1669021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dacb20e3b5c5843fe692261c91f976cde404763b98ede2ae0d28250c704706. 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/TCACR1669113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6e135c4b7d29a7c1450416b1dc453aa4b67b1e9b7401885fdc0ed4417bd5d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACU1659294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17a6bf6097b09de5d037e2d4913162135fa47d84c91af9430bd8324f364238. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:39Z), 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/TCACU1659353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a220880e78e765239e21d907ed52d253c9337ab3e0ef8694370a79a84a74c12. 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/TCACU1659455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9148aae0264631add09e1d53d41e8df2de711d87cee1e9e4ddfc43323045ec7a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:08:11Z), 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/USHM22047454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a583150a0605427c4a3b2b02ce8d8378eba410b93b452ba977d824b73cfe8. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:26Z), 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/USHM92192816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51000147c7e160d586d3e9b4e97eed230372290ced25b6fd69ac0c3af16e1416. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:19:59Z), 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/TCAGO2211069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c41da68ceed3522ec07b8ba111bc60e70ca33fe1312479563693ae17ce8e66. 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/RUUM71600092.