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 0xa247947394b8add4cdf64136c2e83f8dac6600163114e663f5eb0f78148c58c1. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf7a435d-17fe-440b-ac18-870d33f0ca71.json and https://artists.proofprofile.net/proofs/artist/bf7a435d-17fe-440b-ac18-870d33f0ca71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x81f8b084ff1ffd5582ca559ec8a9a6ffbd83866cde4ad017de67f09ccf9312d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL0652001654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e95b536a47724cf7a708fdf772bf859a07d11aa5bcd4e0d85521870266e4f9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:32Z), 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/PL0652001655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e9600e167c4f3aa388fb9b73298cc5dd8f84c185231c1a19476573cc1befd. 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/PL0652001656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33db33113f38a4aec7a3e3e67a0d7d0e6b5b65cff05c349f28ddeb8b4c36c855. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:03Z), 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/PL0652001657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda72f8130021fdbac09b9fd3a6c137999ce9bb23f8a801801f66593ca0e8a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PL0652001658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d9c472de3d4bf447b9298bf4fe63e10b1d1a836a62786f18aa4bc6a8ed8822. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:21Z), 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/PL0652001659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c20b1514f7b62a95c832a8487313193ed33439dafb0fb2f85c2c918c4c8336a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:46Z), 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/PL0652001660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845e316a9d58ab4545043ccb72c3e1d1dc2948596bb4877dc09ab855db7bd399. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PL0652001661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7587ef7da286a7019e8fe58d1e62a17a990c8a1b1b727b5725f8e7e6901df. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:59Z), 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/PL0652001662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab6ab7d266cfd2e6057995cbc521031c5d2f29e7837d25bdf1d466d19baee1. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/PL0652001663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d95f8f7c29b139fcf0ad6a0279f1df952a9e41181dd67d150e65b760a2541. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:32Z), 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/PL0652001664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb855a662dc8d79ecb108c46a34403431da585d3f0eca91c4974e6a3dffcc6c8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:07Z), 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/PL0652001665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdbd6fee0462ab47d7639bd4bbd6a37db34ed82770d52d518a56f2e250825e0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:17:38Z), 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/PL0652001666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db02afde28fb808fb647d9fc1ffd4797157daed426916cacd45f8283aadb05c. 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/PL0652001667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af934ae8385e5144424418c2c67b0528008f1c846a0c4a214d80279abdbc2e0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PL0652001668.