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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2859578056358b81b13dcbeceb413ce729f6af7afb19ea51f42e87a7117292. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8823765b-f616-4bff-9008-69e56400533c.json and https://artists.proofprofile.net/proofs/artist/8823765b-f616-4bff-9008-69e56400533c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2030055dc45d4edf12502a5b09c7e508ccfe406362d549b8397372e39247bf5e. 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/QZNWZ2396673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce955264abb04fe6c8f5b75e3534d0d51753b58711969838b4c95e940068aa2d. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/QZNWZ2396679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7f1d008d0e9b55d3f7b5d8606153cbf49d57da395533b44b702e6304e9414. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWZ2396681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb3d63a83d2b53d9c66954207cca2e460cb12758927981d7a5cc8cd4229ea2. 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/QZNWZ2396682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e36ef297c25371558ec45f72dd6674478146922e0508e852a9b65a0fa11d203. 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/QZNWZ2396683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c5673218e6ba73cc7b3a526c13d2d71c3c3f1c056190eb14db4195b2f2f66. 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/QZNWZ2396684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b5b03e8cf46ac3daecbaafdda2f2e1e4f2c0b70c21515a73fe9f8b15d0faf9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWZ2396685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e5fdd63f2d170d0695113cf038ae0f91d518d8ef9c3271dced0f14e2b7ee9. 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/QZDA42499551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e191bcca2d77cb0c012205f980cfd9baa6e0143f594746650a47aea141ad22. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA42499553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777df30c1a6c20e02faf20c8df35d6d9403fc818eb5ac76b855f1046f0c2a99f. 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/QZES52413726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b27728cd503293c9dcec41aef8f2a0562b68056fd3696458e214045d0938af. 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/QZES52413727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50795337425d525aa86f2c1c47503fc87a9906ba0d4acb1d86fbfba260e36dbc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZES52413728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd347f274ee062632aa611681b725873c9b00b654ebe77cb378e9185697a84. 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/QZES52413729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778485c75ae81d36ebc3a9b1c7dd799abebcf5ccea90979b967722c18b1a5118. 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/QZES52413730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93087c03825a01ba825436e2c59f1e424921ad65f2a7bdf28fec41bf3e00d001. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZES52413731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752580e7a5162192891d68152e859fa8814de79f3d3b6d7e87452d1298035a1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52413732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d286ad9fae9f97aa8a3f7ace18bebd2bb9d80297cd634095a8fb24b818265. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES52413733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9367b13a9210fcb2b0b8b609fe269bf6db0fce860b04667ea04aa91eefcdc4f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6G2430119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7599eef91d48a1ac85605fef5127f75f867d2ac68f66b7c3031db6d49d80c525. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZFYZ2486736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9964906bfdb698747c40a687f20c1c76b882182d181b085825f5ec267492f94a. 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/QZFYZ2486737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2948e5d4a0e09c2e508390ff6ab42201df862c13c2f1099600745740a961a631. 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/QZHNC2357486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983eac5729c1d690cc0ed2ef811423e8f8dd9c48b8c55fcccbcfe57951960e53. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SE6SA2319569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7d21fc63d3da617322ed64562bdbe6ea9ad7101be5e19e02246030219f72ea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFT2481389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0885e4e01609cae3062b25d649fcc39e787ba9e8927d23c1372f5813f43b87. 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/QZWFT2481390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9289b0620f39474b6c95439c75be1d5d2d7e644489fece8c9b900ce949d65. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZWFT2481391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5462c5812f57d16085923415a1f05bfc79c046e371618b6c8a05d6282e143bcf. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZK6K2358424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfed96e9a76688ff2b52569548ed3e81066987e59d4b9bf1a5f36432189f9756. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZK6K2358427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4093ea1dd0c681ff82bc9650cc2000e0b2cf0c824f4a116368b9aede972cc29. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6K2358428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf5c40cb674da4112c91d2add2717f5e2c0d486ba7830399d5582ca72b8ae01. 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/QZK6K2358430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36440b5eab50d5c6a5fcf461cd31c1aa31d12b0efadba94c922f8133bebcba0. 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/QZK6K2358432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209d852e4d5b77d7896088b89fe5effc009ed874d97a9c892e4ced5f82e479d2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6K2358433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e63d1769776da830c3040cdf773d9d4c3b79b44f8d07b26ad9503587a92027c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6K2358435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31c717d69f99afb6025d61a87131556e4cc60682d06f648d21e401387d8240d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA62398696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c39e9b47d2b157300632ff08227280cf3758e9cf921e01aef4f92a0c49f752. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA62398697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2219f44ac8d370bf52387228e7021958a057620fdab593d90cb8aaa149ea9171. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDA62398698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78f9b6fe3129338566033b21baf0e16dbb15edce754b4581b0b50c2c0ffee73. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZDA62398699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc318f4eb3852d8b19694869322c8a7dc801b94b590d742e49b060a0ff5de4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZDA62398700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556b174a4b82364c9bd234fed780598cb21306a803701bab7eac44b25750a4eb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZDA62398701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b9e14ed5227af17313cf29728ce2bb848188879b7f07698af893313bb6d5b. 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/QZMEM2386015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbcbb36139465aab24b418e4aff3d6df4ca746fcf161d493193dfc56cffbe37. 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/QT3F42441368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1874000d4f9af1471bd147beb38a2e4b172910aa4198d44de3ca58853958e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB62290561.