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 0x5ea5578036c9108bd2415d939599e699fdcaf0576e4263e710bb202ac71ae134. 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/4d444454-baa3-459d-8d0c-38bf99e171b7.json and https://artists.proofprofile.net/proofs/artist/4d444454-baa3-459d-8d0c-38bf99e171b7.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 0xb428b65ecb1cfa568c130249af729474ef83cba1a111e70300619d9b126d0cc4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB2390875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc753340b0cd9419f3318b221c19f4228a27ac2664a3147052ae6718f23bc143a. 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/QZHNB2390876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045223150dddfec9b6d830726ba15a5f918562481c69223d109ca3317d4624fa. 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/QZHNB2390877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafdacfa3e373d237cccc0ffe684d7ff86ca136d49e0ec6ccaacdbeba3af4f14. 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/QZHNB2390880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9a41310288afbc4f71403ebb64e169211fc5c8aca4a3907338f348c60ca498. 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/QZHNB2390881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273033abfbb2476ddf933563e8a616116c842fca4ed93f007ca8881b6ce3e164. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHNB2390873.
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 0xfa135d50b90c38bd9c8b35a22c461752460f11a54099358751fe6502def378d3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHNB2390878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308676f726b5b4338546477ddf8334945dfde05b293176be6b63d8c245a7e02. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNB2390879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb779b026ad5b686191a6e772f9145062f2da2c1457be0046a9f1802f9a41734f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHNB2390882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac62399246a2f5f2ff47b4c29d52b820f064844238ebf91f10da65e21f03356. 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/QZHNB2390883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bf6753b56e54d160505cdde66f48ca80142ced198831ff2a9cfe7aa5431c1. 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/QZHNB2390884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267b67ef70cdae2c91bc2fc478327bf73bae85d5947efb064bbc0d56f03449b6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZHNB2390885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dbadd032bf38f7212a55764b72a5fdca108c7f2c0aff623461694a0ee9c329. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHNB2390886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3af2961bb7fd0ed60bb3e1c431f68cdbf2246951c67fca17c888baaaf0df3e. 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/TCAED1986972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4ad33596bf2291738f9b244f31a460e999818903b599e9d3fa38e28e290f20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAED1987055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a453b35db9d3e5e861b0c88a1741b9850646246123c4461a168089b191886. 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/TCAED1987127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7b959419a6f48fbc5e3ceb1f890b805d9500f441f74f72c7fd300c6b53627. 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/TCAED1987148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ff086e70cc42b36eb6735dd450e2150cff106520056e10e1bc5703f2c6fe7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAED1987157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29d262e789f26bd2322e2085c7b606eb7c4f66ddab36eaedb35875e24e7fa7. 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/TCAED1987167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfae59ca0a250cccbc560ffc8273df32ee86e52bc21057c59c9630d96008e599. 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/TCAED1987172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd044bea0e0b9f4f264a7144b10fcb445be56cfc7f0ef871b0d44701473b685fa. 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/TCAED1987180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a291268e6d43cb4a2e10e2ac15f92548999ce19b2d03098f39b720ca678f49. 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/TCAED1991831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029161153aa3ca3c51e888711775e4648f7bacec06ee1d862bbf424dd7a8107a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEE1904418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f95e85a2e969219577217d4c02d4ff31393dc671bcdac44125898e534e3251. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAED1987083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08d7c321697742e57221258ea7fd61703167e4dc3b6a3343787d88e2e4ee3a. 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/TCAED1987124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a686de16f98e814bd726dcce2219ec96aa7ac3f636454ca1358ba591f87f365. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/TCAED1987138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27667f15fe774b17671be4a4504fb726561d1448aa318777d02943375ab773. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA82308655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e84d341d223127f7e6c7b227f1787d9e60e113cb8f903401d9474c6612e38e5. 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/QZDA52344042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf295092d4f51fccdab1e31f143b34ed289ad8b102311d2d7dbf9b10d73b04817. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTAU2240077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739e0b320ec5e6422d3a3de26344e118b960a98e6d95e89e109f91f8e21b28f. 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/QZNWZ2294257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5331998fa08783212cba3c35dd09a5dbf0031f6b67ea7110c464a4eeb728aeaf. 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/QZNWX2232035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a2aa206b8a72ff6f3d27b4f551bca70d1be2821df9b805da45d6277653c81. 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/FRX282006005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca87c052a46445135e5ad0290099e5e326008de8641e7c3ee877cfce4a40d9. 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/FRX282006006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676f03e6d7be7bcf95f01492175741b6d396f98d50b84bf132a4a959902ac659. 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/FRX282006007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287bf5c8dddf68f27e918ccf6b53fa329bca2e8cb34913c833bba6b94a7ebef. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FRX282006004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa194ff366b78a10c3de191979dfd7c5fa560c7e2d7f109623a806f31221a17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEO1969863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0be913db49550128ad170ee84a4ec9f7bf954b638647d1bcb8a8a728b2f507. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADM1877485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfcbfa496d4a21aa152a5903d34aaf281a514c2768c182b2a335f607557ba9b. 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/TCADN1805366.