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 0x916f9fcfe799cacb93ae348385f3a0bb90f7ae505107ffb97bc5774f17cfa18e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d04040d4-fccb-40a5-88b7-7ff7e535433e.json and https://artists.proofprofile.net/proofs/artist/d04040d4-fccb-40a5-88b7-7ff7e535433e.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 0x636b6c13f0277b3e7779bd1508164ecfee1e15ad90bdd903add776ddd2045f5d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ782470084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd343cde8513466bae2453b4d1e5bd5ace99f08645b5ae8a80ff396536b7412. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7N2455625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50841d2e2602488b6a8aaab8e4d2ce87a076b7ca9665b29d993931ef31c26031. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:02:03Z), 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/QZZ7N2456651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531ea9c79317e85e2daa65d966219b593e1857c87ec97715ed4fbc640895879. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:06:46Z), 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/QZZ7U2438685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5b38df62e32ea5ab7d87bf33a720dfcfa19b8b36ebe06827d1e4137088009f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ7U2441803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94658658ac6941dc8283daa278a53670b3be080e1187574823fbe25fe00dca33. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:41Z), 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/QZZ7V2474333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d95b820ba597ccab73424e5ff7600e63bd50a11e562ff8782fd357eb36018. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZZ7V2476942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e646f03b9bb0b8e107a95084be69e5f7a5a07620f32b853eb0e41c7fd647cb8. 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/QZDA52553127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d72e2dcfa5be2b9bdba08ad1e0549a65737bffa6a63dbfce6a8d8bb902e305d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32577271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeb7c7332f5d2beb7c9280c7db79a9cf3d3b4f20a0cf7935c882bec2ebd1c28. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:59:02Z), 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/QZFZ32597143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7849d4659c2e9d7723d4004f5653dced4f244d2ab1c4a161dc3001e072b39d9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:59Z), 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/QZFZ32598505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0ce6db7f12c5a560c86cbf24442ad3ac8e77f20f0089e22100e3053a04281c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ32595444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd86b4c61b022fc8ab42b295d13558f5285edc0eccc7733fbfa357c449001df. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES92574544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121ed67182db9b1bf4bc5732bd0b46e4290bbfef6e3ed4d0fee6b0730aee0a2f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92575825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5400894cc5a1a045f5b1487aebcbb549c0f4145b6029a1a47324ee363bf01c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:11Z), 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/QZES92579123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2cb1b257a1bd6ed3613b9ad1f6430ee2605459cd2c354d844d862a7ad5d0e. 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/QZHN32533330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2721539610fdf6a27a87de98c08d0419456ccf486a9bd3c41a5a51fc86a859c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2532951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae6846915581ab6c13ac64bc92a69200b6dc5917633a1e9bf08f68c5785d4b2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWR2511303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e53a71f008a1edbf9fbd1031c39e1ad49edca545c8d70ec79ac347f06224fe. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWU2552002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c976c270bc9fae37177a533789231b8675fc1b2105fa28781866d4ea0a3022b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWU2553143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa52d0c357e28cf6923829c0dc975dc332c880ad882f15c4ca05ea104ca8efb2. 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/QZTAS2578499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b58e4c9cd719efbd6dd9e4681d6a67acf4976355234c5f465fa3d8e3a8ec091. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTAS2581119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd2df16ddf619af2206742d4f40dedeb7fe13431c13df2b379a992ab8afbea. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAW2582948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75691dd72fb6c98bcc013523fc409b0e5bbb2b2e2583a1178b47db96ec5b7cbd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAW2586762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bce970f724419c0ae1da00a6cefcbabd072096e6d845321ee6590ff06ffdcd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAW2586764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b1920db1c1d54660df70ebe877431297aa518c1c68b5391bf263c9f972e7d0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAW2586768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449ff13300c87ef8c60fc3a32d14d7f8a2adc6d6507074faf56d0db442157cbd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAW2586784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ffa4c439d1c72aa7b25175890f917e3aa3269b926ba830f7c3cda3a393c9ee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBE2580828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ec22370c2138da53260655859017082ed2965734248996b329329ef324a9b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ762528302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa2f91b33f4cc704f5d5455fa7bbc098d05de5e0881f58689d39b27e3069b1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ762530778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd08cf8ed0307e54a29e133ba8a8fb43bfc7b93d4c0071afa6f5eb957d20a6e. 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/QZZ762530779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd8679a24efa682f2f196f0f191f67e4674c3a81bb1f71ab4174e8f4b600ba. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ762594403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65417ddb520c8cbdb4ae376be87893d792775db091bbf21409d84b0a9ec4165d. 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/QZZ762596149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2ab7e8b51a3781425878b2bbc1dd2ec0895742e18b38563296f5b751a49fd3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ7X2507041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f3fa463130fb52e093c166bac9629a0e85d3f4319b32adf3b749031e1dc33. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ7X2510284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7542e14c6ab10a1f62c255d098062cd074e421fb88436d243416582164bf5252. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:06Z), 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/QZZ7X2510307.