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 0x2d64ccca3e25c63295e709aee618259362f6f0f03f8ab395121bd51587d79c2c. 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/d5b1d6f3-3164-448b-8bc4-5397f57c0ac4.json and https://artists.proofprofile.net/proofs/artist/d5b1d6f3-3164-448b-8bc4-5397f57c0ac4.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 0x92f6931e8c7f6c7fc61e23a94bb10d560e2afbf1837f6298d0b1582569c2980d. 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/ESA012370017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5bfcd77b822d4d512ee69a5d975eb7e2cc8bdea51533e897af227c4c0b3924. 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/DGA0L2389039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b83a2330911b129b3d22c126b1cec95026f4c248e7848333a5b9e4bb7d1a890. 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/DGA0L2389042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d82a4be743201e8dd0ceafb2595819aa1672e83317b0477c0001c37ac52270. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:38Z), 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/CNA010440101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190c9c5a82f378ecc7b76079f26201263f81f3eaec9e0fa21de03caf4776b2e9. 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/CNZ171500499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c6488d9a1cef4025389ef1979842e06987056634880ec82fe4d1520e64993. 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/CNZ171500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b871265179b24c9a3d3ae987c4c9d92dcf95b479d1a9a9b2f5e4178e75fcdc. 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/CNZ171500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd291e431b6a215a38f9c62f85eff14e1145fdab49001c672167d1977071ee72a. 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/CNZ171500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468670bf8b6365937beb46cc53b3dcb0afbecb4ef8937ba07961b26679e221ed. 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/CNZ171500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87105c6655015dce24b72950f882c4b5154812ff81a543b300f20276268e210f. 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/CNZ171500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf4defbda1e38f3ecd86a75db22f5b4b1629ec2f7441f32ea3d0db2e2e381c5. 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/CNZ311600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a57bb1a2ba04032b227c12fa57905103fc3d06cf2e7529ba8088e8cceeaf09. 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/DGA0P2389238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402049a14edbf8ee0505fd3e804fcb4110ddec2a57ff35304e18390dcd500866. 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/DGA0P2389240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ead6e8d48cb5bb87aa01076103634aae037a484d5f14b1106c759d2b402c26. 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/DGA0P2389241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf86bf413078f3350530d7a58fb9a88c21584f8ba9dab424c8078727876a93. 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/DGA0P2389242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08085e986cc432fd555beeb95a2f2aec11a061b645cc179f7d22782d68c9d324. 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/DGA0P2389243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2d4bbe3f5e010baf02ebe3783c7dd559decdb96f9a2a71f4ec658765e1b597. 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/CNF139500461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d3b4d87b6eeb28e97a8e3e42ea130153d4c6d7c87f598ac4ea590acea45dbe. 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/DGA0P2383086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76007bacca555fa0c78ea913c541d31d3e3d9867d7ec6dd2ec99a14e2d7e6f6. 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/DGA0P2383088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a86b4a2571ab8fd3e4464875c3e440b0788ac5a0f6f3be000667924c47856. 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/DGA0P2383090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f017a512cf1f403a2db72389580a81c5558673a99a122b406bce7898666176. 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/DGA0P2383091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345975078fdaff6f21a212cd1e3e1359ac0d8033edba49caa8db6cd5402e61fd. 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/DGA0P2353239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363061d9d5de6d5168a074f975770908e818abbdfb1adb8d9aeaa90710424c1b. 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/DGA0P2353240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8787ec756010f9eaa7dbd3096a06fa3402be5a847a32da9ceb30a1145a07ebc0. 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/DGA0P2353245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28733da60e06376122cb1bfe2a4b8a487d131f71a56e1977baa797e95750de34. 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/DGA0Q2383712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc439a0544d7244b011b5824c7ba7837354390735730e0196eece4c3c89cb23. 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/DGA0P2314160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515011077e3a2baa3d177312e6fe8eda8a30d1d8df869260a204c789a7be710c. 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/DGA0P2314161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514b1041c66ff0eb415ce06d36946984edfffb784b12c0a5f40897493a53c6d3. 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/DGA0P2314162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6bcfd159d3d206d8027a5b3bf233760ed8996b4bd55ef458d75843a5fb9f0b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA0P2314163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16915f2b80600ed6532dd6eca4c529f3cca053a94f519b7023bf6c93a43288f5. 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/DGA0P2330038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddfb83d67b6f8c85bfaad35cdb4db17dd5de1bf4e049c555adb5e0e1c2c787f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA0P2330039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622e978b38bb74f84726ecccb56ec5411eddcdaaba6eb094489df9002bb2274. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0P2330041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe218fb5fdf8c72c1fb566abe6616bfc86f282c5590deeba47b0c9ca07ddb0b22. 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/MYSW10890504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f86ac72b79bebd3e8b9552aee9db19ce245d9bd9e7b4c9cc7e051f1d8ed918. 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/DGA0P2314423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8225bcaa3c6957dd4a79a5b95f217b9ca610d7dfbe8da7b992aada79866fd8ef. 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/DGA0Q2382135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66d2ecf1da3d9978c8033a0ea676e5981404e3b0b46adf95a074978a16e8ed4. 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/DGA0Q2382711.