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 0xd0cb856eb9b04b010b50b9281195ccb8426ef74b077192f78063d5bb20cefdeb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0ba8ea6-0f02-4b63-a5e1-ca3ca81a46a6.json and https://artists.proofprofile.net/proofs/artist/e0ba8ea6-0f02-4b63-a5e1-ca3ca81a46a6.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 0x6fc22c82f367d32c2ccd9468f572ebb658143417585543a49d4cb20b2c779062. 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/QZNJX2451234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678cecf10d59e8f1fc7c11f229c1c9ee380cb4e0ed5c4eff3672292cc8df7055. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82500968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca03b3729539fc04871a751a69b13d64091eadf1de77342dd144bead59d6e58. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72575121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c482be7139e20fd14594567fb15e109ce4d2c0a2649a65783cb2612827a8b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82500936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ebc9c2876309f4a4e9da630220860fc325c00664dd6f7d5924f75c523458e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22533061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6094c07da0f5d9998f3a81635a9563750a9cf29a415fe643cb7cd412f5f177bc. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82533657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d253a054652d0ff8f08f35f446588eb1fe91dd6cb36cebd264e9a6a94a1c823. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82537238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47ae14b4eeb0f541e14691b385aa29072dcefb1d6d6c3b943949732b090c90. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82537247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8fb65024e7fa6503f08f1971313a102e7c202f0e1eb0fc925102e5e6bd7028. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F32525318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173453a080371021ad8adb2e6bc3d30ed0d0d5696782e6d2a32208c94c182f8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F92532328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f5bba7d00ce8806f00eb1448acb56826d78e4ca46aac9549bf623a1500af8f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F92535375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e9f3fa8e6ada4aa8b26a8621e61aebf864db59a8fc0150f13a4f649b7fbda. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F92586457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e90b158db0a44a717765d1931381611d637eda7518d2db86d9f7586b45cb2a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FA2528264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf062b2de51db34dbedc684fee1dd62d93cd86fb32aa9e44d70d8e96ead5caac7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2553927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0bef058f305bff4590bed263d9bf7004abd186ff58adfc6c08dd27f51052d8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FA2530880.