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 0x1cace3ff80c2e19861c261c511a9782d672e3110ca8a6583459474f4a7b2e3df. 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/10b83c01-9af3-4fc1-a474-8799e38392c4.json and https://artists.proofprofile.net/proofs/artist/10b83c01-9af3-4fc1-a474-8799e38392c4.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 0x02efe24234ae2e210ff0e2b554be634eb46d18d6116e0903652ec787ca9b725c. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAJE2565916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcced1a92a84cb7aa4922572335b2b99c0097244c69fc6980b7e684c7ed2216a3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:08:13Z), 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/TCAJE2566183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220795e0939ead6b6d092e253a52960c72c6ea3425ffea03bf093385bda3c9e0. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAJE2566081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840dfac56e552704435ab6847279ff155065a5df5178ab1e68b7db9090ec26d8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJF2504998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6a8ea3afd44b4a683b53466a85c3d198a3838ab3b96d38952833da73a31083. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:53:47Z), 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/TCAJF2504863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd6158363b9b7481738adf5eafbe14a7c7b444253b52852aea9dbaaaa407022. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJF2504923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d137b71fbc6f8f6fcdb17efffb8f4abf115f433f2aa608483eede94a9dec07. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJF2504759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93286a47e26ba8dfb9ea948748d07a826c5a04499f6a7cb9188cd5b5943b86. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJF2550019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6c12c9591152fdaee57c6ffdb8519fb0d1b8722b159ac746a7875b39704606. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJG2559093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d7cfbee8c422202dd3cde25e7ac28bd78e8020afbef559d32169e64d80edcd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJG2559145.