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 0x0d047aebc6a728a559022cf4c464273d76968e9211de5cdf248a8b106661bd0e. 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/5f525b40-ac93-4027-ba06-8c11f69b53b0.json and https://artists.proofprofile.net/proofs/artist/5f525b40-ac93-4027-ba06-8c11f69b53b0.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 0x5ac1cad34b62c45db2852e1dd234f1ca0d108cd7d4d0ca812922982d5dd2c575. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN72076365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a14e6d1d22d4d3fdfddf0a53f050dd0bf4de9826dee189af70f3ca37070c2. 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/QZHN72076368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e45f754701e689c7069ff125aa5629ba10dbdaae7d2f111c789824cd408142. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWR2085591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7deb1a736e7537867afe9a16c5b266b9e05c3e26a2b92d0c976692ce7152b8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWZ2087558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710610352ae1cee6bf278a2d05327f8a808d9b9eef141a0ed5da6c29c69cceaf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92262293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a43633d5fa13748b87d80462569b3e1670aef534f8d36317a1357918e7915. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:58Z), 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/IL5842237713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae52e9118bf27dbae5017d548a0d71665753754333c57ae72c0c9053315c1e8d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IL5842238412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3007f0bafd6c02ce0a5a1e4eb60a2a44c5482377b9839a3807e39f8ad07487. 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/IL5842339901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734c9d21b81949b6661b73b988e54549bfec2d1761db968ca681350a388e094. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IL5842342845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4af26842f99a31bd3a832cd43d0017edf0f116b7aa49a8707fc17c88aa448b6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IL5842449880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cddcee7a2bf19d05827ffe8fccb9894f0d21c537a140d895c983adf10880f37. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IL5842554164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f19ca9f449e163224e443e3d736deecfb904cd45d4b8be79e57b325486601c9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:38Z), 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/IL5842555706.