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 0x0ff3a95d4f751de622a563a9931846bca07c0a8090ab144f21abff3338bf9a81. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6de5b02f-699d-480c-85e8-6b12f01e4901.json and https://artists.proofprofile.net/proofs/artist/6de5b02f-699d-480c-85e8-6b12f01e4901.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 0x9c0dfe811a4a91c99fcfc973fcf31da86f007f1febd1a5137e32311b3ae26684. 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/QZS662115271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c0ca60d6d31e9ba72516f9089d5e2808ceb210405ac319846b4480e12a1af0. 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/QZS652166487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4724e58f9d009108befa678959a155f44e0b6064e6cf72820c8053deaa0f1e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2423544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103efc126830e51b2850136b7132d4ce823607fc4a8430b2fb41d86f90ef796. 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/GBKQU2423545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a7af92f991d2e3f5441f52ff8c524e13106cc3f96a2161f3786e7bd966b7d. 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/GBKQU2423548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad925f67cfab8ac2d214519fb6b194337bf6d7e6c1fc809926f040fc53b3b7. 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/GBKQU2423550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dc28e8f6adb6f758f9b43434a4a1a719b49bf776f5a9eff7219ea2c5978bde. 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/DEH742311986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72787129a09f6067a77cfa6a3145860108df4978d703fa19452ceeda12f5d21. 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/DEH742311987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7822cbcf46cc1cff14f180bbd9df30f3e237733af375aa3bc3ef1633645b71. 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/DEH742311989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd85d38c0cd876193d8b36a8a59bf3d0825e4cca44fa3ba3ebac6abd988c78. 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/DEH742311990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1266c692348701232083cab8fe4e203500affe8d9c2a79118a0ce75542363. 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/DEH742311992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c046d4b309d89e4e354ace985bddbafe510fc47e3a5eb7b61e5e899028be53. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEH742311996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef44565bb5b5c77772c6412922e63a4f9e0d82985a2589a8e1b684ec5db8d6. 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/DEH742311998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ff543c8984d0517d149481a35012901fb955234f6eff10cd806d96a0c2f9dd. 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/QZS632146391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77aba5f150bc0c6b2cb2404ff74ee771485974e381b4319ace86132832343e5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS662173672.
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 0xe8d5cd6d5701239ea6814bd893032ab44f373a9e63c404b4004364aea67c2ec0. 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/GBKQU2137553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f995e7c16796f99c3e7d25130d8f5fca9053363a5ec4364440f0d51801ae2. 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/NLCK42402780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0342c93b9a7e3c5ed8fba9027aedc8eb247954f7f45bce0a17ebef484e2c250. 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/NLCK42402782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee38979765a6e6d541ea295ce36f1ba193458f879627d9fce5e3dadcf441c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42402785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122a18a03c26c96dd314795213616baca8bc9be8f88e8c50dd876da8c12b58e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42402798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf316e89be9e9134328c9ab16cdd5c2c126bd7540cf49fc0ea1300dec49ecc6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42402807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38f8717e3ad311e9f61e2d7b191162da76d7e18a226f23db8523e83fdf8bc3. 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/NLCK42402821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e903853c3f5622b990394231b201335edbf9ab607a259ac7b120d137a74a62e. 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/NLCK42402823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58434b2837f291c67bfde9bf9ce1a3157e0582f66f06bbc2eb09f0ead926b28b. 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/NLCK42402826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b6962c9daf66657230e3fb4b95d844445ed811d6c02b3629a25b76cdaa8213. 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/NLCK42402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aefe10d401cab1cef231a9c29f486e589cb9d7bed02929b3eab58a95fcd30b. 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/DEPI82310508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295ad3a38aba0d3cf51090a39ca0b96580dab6fe84b9710a4578c376fdc1a7a4. 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/DEPI82310516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396249a09c8bd94e6e503b7a5868fabe7a682c9ef98b01453fb03c74228905c7. 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/DEPI82310521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689c0d10a2c6c20ba007392ad073c0c9647c1a458ff2e2459966eacfa64f418. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEPI82310522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ee0a5ddc037dd26285042d13852f5f7fd24bd5156f5d6557b4e9f105abbadd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEPI82310517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbb350a778950129aaa0f28e4d7e38e24ea9bfeafcdbe1f4ac262e107c1aa67. 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/QZS642153126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a8ecdcada8f0aa7f2a768a5c1bf796d7db22c505b659e7f4ea35b2b62f8838. 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/QZS642101452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03035cfd9465c1c889b844484c3b7b748b8158898197bf2c4e60d24206c62a6e. 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/NLCK42216296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487eb77f7e5a393f3fc42fb9491c65e7c577cd03d186fdc7ae5e187da1d42fae. 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/NLCK42216291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bea2a22f895e824d52ee8ab13b13a763009dd50da182c43395cd5403a3035. 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/QZS652390370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e55f01eb5adfb57fb974e8404a53820b85948b75847f18a9ef85a821c01fb2d. 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/QZS632303864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b56ee049d4619ba247ff237ed10e75a152a4386d55c627ff6f9aa157e44941. 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/NLCK42226066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c927e5697bfc2142a3196a7cb99f266ad1ef29f7fc1ef9971583321ab1934. 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/QZMHK2343160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5393b9a82f2f4869e6e90c65a123d236bdd354d47d9c546bd824fb6c2ab704. 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/QZMHK2363847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d2c5289520a2eef6928f1da73ba876a0653bccf33ca1b4d7c15d43160aa31. 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/NLCK42227724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2c52646ff0d7ba729741362c3d6704578fa41dfca8eaa738a9729a9686504c. 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/NLCK42407461.