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 0x92603b74cc9114d6c5548f58959c0f4b019a5837ee16785660c79ef6cf591205. 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/5c50de3b-f403-4bba-891a-a8eb64dce08c.json and https://artists.proofprofile.net/proofs/artist/5c50de3b-f403-4bba-891a-a8eb64dce08c.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 0x9a571e6086f31c3de891359339f7cdf343252cea101faee02db7d684354309a9. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWV2054061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8428b49b4f9bfe2ee26d0d1c6ff80419fa364df21eb41b69845dbdeffc2664. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82173722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8f29cc6e2c8b37ad86f31f58bdf6fbaee1912318abc8c87c8e842f47d815c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTAT2145933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa934293ab8a7260e5911c875ed527bb462bd9cf9f96b37dfb7567e904c06d7e. 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/QZDA52280436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595847aa7ba9ea7beeb7f13512c03c063cd5b8dbe3889e739fafae6f997f935. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:59Z), 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/QZHN62306106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b103c9e135aa6e05451d7217994da5580d715d85bd2f58e19c00aeaf242943. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB42349831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e76f8bc3f8bc7630983cc0841693cb40e2d1d7ad19e6e3a6ceebc6ac9e80e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2377781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df76e04ce20a29140560c67b137263f04849c1b054e4dec48c309319fcf5bb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2377783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb275327c0e8e612669689034220748925466260fef006d8d8b08be13621b0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBE2377784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b103c9e135aa6e05451d7217994da5580d715d85bd2f58e19c00aeaf242943. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB42349831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe4297cc17d47c9d0a0e77b50fb4abaaf12ccf05799821696161d8aa2f36695. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTBE2377786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1026b572f1a2ed3b322c7841db4548a3d4d5098f89bf8361dffc6e809fc7e1a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBE2377787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59626215b2b208782954cd8076752f9d9c5fc9856d8138a570cc47137a6b4366. 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/QZK6H2422230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c824672e449664374735c1d20e15c10f2825ed5b3db5d43c12a3d5336a1e38. 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/QZK6H2422232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa88b6f64e64ad8fd581fc43d5d57984fbd27f0b013873a22ad0e39a0ee357f. 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/QZES92525546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b322dbe988ea86af41b935864fbc006735cf7f1a18a30ada9b1d6098485bc14. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN72500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1421f84b9a6b009f1993b8b16caf7855eaea9f961ad61aa767ff59ae08d337. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN62595974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066589cc8bdbd2ca11b9de9518f970cdf41f543c9886f79d20f2f48826c5e36b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN72500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64d8180c7fd85d24dac1e1c64463c195069d58275f754bfca93adff2c05aea3. 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/QZHN72500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6eb2e91b005ac84b1dc7941b94667d4bfb81df007574c1c1d43207b5ee7596. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7V2517910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc560efef2c5852b35cbf6c7de6899c8b878ea7b2879717a048c71fd9cd52e7df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYY2133457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7f75de20f69bd33b16ba7479e83a66e286612170ec1b6a57f9663ab0cc6eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUBEC2119765.