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 0x32ede883b5cd07c990bc16d2b108370a6e42802232ea3d50aafae5d53279c6ce. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db39adc-32fd-416e-a5a0-95d2f764178b.json and https://artists.proofprofile.net/proofs/artist/5db39adc-32fd-416e-a5a0-95d2f764178b.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 0x3dad9defb68d4e440644c6e9754c5ec93e3d6f43b23502c77eabf6f4f4c80693. 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/QZTAY2305314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691f1efe3a3a2e0c96bc808602a394f7de97f3a33b79ccf43c88973fcd571ef. 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/QZTAY2305316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73c1065685c4527282ea4394aad709b64028f0d245e30f111f701d43ee852d7. 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/USL4R2121282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c703635ac22f31ad415e4f52546357367b7c6dac206ed22af893f30aa3f816. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USCGH2214807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e641683a024ebe20d5b302c1ed4be5dc8949b0074d10ac21fee5bd83f2f1c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAY2305315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71476eeb7393f136b0aa67b210c6e020baed7440f774c12ec5aaaef534b8328. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTAY2305319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f286f2a2541d90aa121f07215d79c0be589a16f36bf3bb14f65374121794fb. 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/QZTAY2305320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96608f76d8c1dac97ff07020e471ddf9f799831484e1a3868de85f9ebbea611. 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/QZTB52236513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea00d44249e2cc96ab16899e3bccb2b02eccc5d5cd343831bdb950a12d03f3b. 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/QZTB52236514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deb248340f02824d5f79b3773a48352b055e9792d53ee8a04cbc423b83dc3c3. 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/QZTB52236518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d1bed0c496b7e5ce0b4a6e77231a7a7c89a238b7679aaa7c5be70549d863c6. 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/QZTB52236520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a5074d082938dd4d62809fbcf0038c87dff18679883b39c6c2cec48aa97eaa. 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/QZTB52236521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484775ed274440ea84d69f1f25ec353005214f3c4d31907f184ed19da3f2b0f. 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/QZTB52236511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52079306f17068c08b37e0b8319d0bfe03d2182863fddcb85f867d40d2b7af40. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZTB52236512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61146e48a87bc0b4095acb55ad32faf3fdec60dfba44ad1164302ff62f13045. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTB52236515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66832136e5b779b4f79ba3e93ef1aad3ca65ad4c73179011bcd7af350cdc9ef5. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZTB52236517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7b0e4d576be83227b0021b92815c177b9a6c96ef3ae78825f8b2137fd63f7. 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/QZTB52236519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf812f17fad45183a51725fd8e4cae366006086e6f8f35171b320e6958e5c3922. 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/QZTB52236522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28ae785ec5c956cf230a70c55d7c175238634abc8dd1dc1735a3656c34b704. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTB52236523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b3e01e5437cd1aa08d6d96e971699aedba3e01849b198cb0805c4adad22fe4. 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/QZFZ42056132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6205968c4c039f5176c89d5c881b868b1dc4f2faa4d232c812a0688b17683441. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFZ42056133.