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 0x5222d11e27fb1552916a85bea7c9d90930839559f874fdec45bb02ec5d434612. 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/b82ceb59-e65c-46ce-8f2e-4dd1eafa9c09.json and https://artists.proofprofile.net/proofs/artist/b82ceb59-e65c-46ce-8f2e-4dd1eafa9c09.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 0x8186794824dc8ff7b782714907db138b518b2a7fa5813494f4815b106d1150ef. 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/QMMZN1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b85f81ef19b9b8d98cc76e0029640c1d35016deeedd1d6ff4c72238c2a30af5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMMZN1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20617f94e0e5d366ab4b9e5d396f53e06e1b33bd5745f00d09ca0a9a5a5680a4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:16Z), 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/QMMZN1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd5c6b282ace91e6b6f74ebe43c7d52efa69e81e5c86754700788497eb95ca5. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QMMZN1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0de547707456b8ca08a06d0618725fb7fa02507d97bbe72f7167688f926712. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:02Z), 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/QMMZN1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6415aba68f32b48391f9518d3a9c61227059f2ebccb34c978bc48132d9cd21. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:22Z), 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/QMMZN1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdf2b351dd4c7110e88af5a6536cac575ec437f148e8b5ca463cb9c86f6b8d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMMZN1601107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213d44ed2e56ab5df4bfa820a042e06ec7087f2a76b8660913c6a067bf194d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMMZN1601108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062006d566d2cb6c1d8d86c42f3615f94393f601e9062f601b17326b6bf916bd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QMMZN1601111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe87058f33d5158b1c90c7b1ebce55ba23426e8e67a7c5a0a53a73e4293a808a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QMMZN1601290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d4cc7cf21b3120d86beee31bc2eae9be777af956f4eab1a149070e7d100ac9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMMZN1901655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0ed765ac12766d5f2d3ce450287ed6f361386f01e3cdd3566517d89d1052d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:40:04Z), 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/QMMZN1901656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c76fbb16fce7e1df3dd7d2361ecaa61442163698e4181309ff599a011cd8d6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMMZN1901658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5816d94549f066c2dad946322f8c1250abef7119abe6ae20983609215275d6c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMMZN1901660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4a176c5f13414d815aa34cf1be9228d695976140efbea0f24e78a9c2ec9741. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:33Z), 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/QMMZN1901661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598336f9718cd0414b39aa6589fe641be05afb0019130e8689de47ea31094bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMMZN1901663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1e35de9697a678a6ceceab1a68618a64f6b34454dc6c3618cd8ba89a86bc12. 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/US3R41326710.