CMJ Holdings Corp. is a music events, online media company and a distributor of up and coming music CDs, originally founded in 1978, which ran a website, hosted an annual festival in New York City, an
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 0x9fff6905083cd6ed434825cec0144019138822d072a28f03b5ac34c14aba5ac4. 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/098989d2-39a1-431d-b5d5-c55702b097f0.json and https://artists.proofprofile.net/proofs/artist/098989d2-39a1-431d-b5d5-c55702b097f0.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 0x7b0904984321ff509a929c1faa1e1e85b95d59bb075e8b22cb4724b12477bbb8. 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/QM3DF2450739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83943822f0e0079c2437dfd81c038eb7251e318f2c18da2bddefe1592267039e. 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/US3DF2417903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa01099e81726b647c9901fb31317b4209e85bcb64073983de47ea8b2819d34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2455875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f99b969639148918a320825ed155cea75d7584c96f50528e017a107fe5e2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2455873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21413b2b0a18286fa3add5138c38778dd1cae653def1efe91a669a37b8a90b1f. 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/US3DF2489129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e1948c731e36dc81a4ae50b7dec519aead08c97bc67cfadc49a0d8c4085768. 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/USANG2437243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef9ab345d3bb10757c6ca66fc1b7999b52698bdc52826e40a3ec9500262e7b. 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/USANG2433240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44278e81ce854cb101124076f481ad5729ce9493a899b72daf9edfb1db032c6f. 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/USANG2431989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b17fa8006f7ea4f798dda9ad367201cc4f3110e375e9275118359ad7e6a540. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2421233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a899f432ae931b538adbb096e9a1969999b57c7a50d94b10497a214a13fad0. 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/USANG2413216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e3c5bfa41b51ccf0ff04d5fcea225ce021662d96f5064b10253253b3edff4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2415506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f3f7f58f5c0f2d5e8a53391ba04853015acccb2c2b7083c9c95c9727465f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2415505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f667096f59f126518554a72f721976f675562f03f00196975ae42e2489f22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2479521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40225f33f5f14728c90928c6f4c70b1aa54660e33a532f6abeba0aa76ec7f3b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2467070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a4ed55cd9272a8a2670b5b74abe92f1617fdf4d8d7a3fee06b97b0dc0d0e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2474563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d099b2aa61044788aa5e4a841f8e161d3d70e40cf2a2add466fa707adbbf15. 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/US3DF2440581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a064f3bcdc5e2d17ee6629a6e0755271b385297c9964c28dc4111c9b233371b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2435758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce39ce445f277192dbdef7cce42908e1a7acac3a4770df1533b3eb01ebb42c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2434990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83943822f0e0079c2437dfd81c038eb7251e318f2c18da2bddefe1592267039e. 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/US3DF2417903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd775ef39c47778a1a5e2f352e3130d2142f0b52036fc931b20d73667cf96fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2418560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca76decdf358b31c5c6be3746446a3576ab6120707a0566e72a6a369496aa4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2418561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a982f4514a9b6d0db075d89a3947bc05cee3aca965e1d8aa6a9c1367c6d3b6. 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/QZHN62489440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b43326ba85538ae24ccb2b860946d5307551a1f27c7bfe45826ef72e4a2763. 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/US3DF2412722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122f4595e471fc4dd5ae9ab5eede1e23aee20180ff9cf7e42c3646dd2c2baf6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2403217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8184eee3120ad6c2144dcb281e1d39188881af177f853a2aba464ce41348a3. 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/QM3DF2448863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0904984321ff509a929c1faa1e1e85b95d59bb075e8b22cb4724b12477bbb8. 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/QM3DF2450739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834cec94b7232ee449cf04a3815c3c73a09f555a5a557da92fbd91b2945f83df. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:50Z), 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/QMANG2248870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3adda93643e02fbb9ce4b0750248614b585126db3f8d7f48e3dd78e42b7057d. 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/QMANG2227497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891078796657f28e3edec43d46b2bbb84ec21b1cff3d51c855f4877d6512d24a. 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/QMANG2223442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b87d9a20a64a1f49a6491998ff8f3c668f2fcce5b91ed697b5b77cadb068a9c. 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/QMANG2216684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8868daee0490ef5feacf477aebf736d5285664460aa81677ed6f788c10aa6. 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/QMANG2206712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2d390fb37e3fec47c1b27380f8af596cf07042b14b8fb2823756154de806f. 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/QMANG2213276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d6c26a8091ea19d7e04d4ba7cd22853958ad4e06ceaa37651b81d29c2e46a3. 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/QMANG2200558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afae49299da0cc9e07185a3044a818bb7ea5680f652668bb80d7f436b8f5219. 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/QM3DF2283733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e9d734bfe422451293baa5a9f5f623e35c12c53ed5580a198a6854a4697877. 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/QM3DF2277828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad64d1bab97abf1a5103090eb9401362a4f6629b8139c9bff76ffd2dbc1d52. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2248066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb02ddbc13df58aad8cf8dce2cbf0d56d0801d010f1ffff86884f9e43b53bab. 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/NL4YD2200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44278e81ce854cb101124076f481ad5729ce9493a899b72daf9edfb1db032c6f. 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/USANG2431989.