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 0x461a6e79ba831ccee2129cf3be8b3a8027abeb45191ffe88d3358dfd6c894b22. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16a41613-7efd-4d52-a6ea-5ee4801fb2b6.json and https://artists.proofprofile.net/proofs/artist/16a41613-7efd-4d52-a6ea-5ee4801fb2b6.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 0x68eefde912f7a8beaa9daf3b42ccfd6755491add949b623f1afdbe9b3481f555. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDY41865754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a7ba234e7fdb6a26d5abdd110ffa54c84858a218ed9ae63d91bbc7c460cccc. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USHM22090837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987820f888a1ddbb34577c3618fc333ae80e4261336038d56af9ad20a996317b. 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/ARIXB2401995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e6b92a92c641a3378a27f6b8d18b05a1cab1d83b4831baabba5c47c3f03bb4. 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/CLUZ21800571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc00b590d145277890e549b7028251ebe09a04395289168c3be8ddd4a33bd10. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/CLUZ21800572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b99ad131b692712d4505a3c79ff3210b3d4d8dbdc7f89a2b6a4131c0758410. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CLUZ21800573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e4af73a6a4d966501761ea3307fab8ea802e8366af342e8a39fc0354e5fdb0. 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/CLUZ21800574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b82f1f82f47afcba7a26d497a5a99d7e874e26c097a2c9ea9e9b4379152bf0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZW9K2367880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5fd0d7b7e13ee4c73f747c99e7dd4e9ff65f07515bb20fb646f6fc8dd3a34d. 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/QZW9K2367881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da675ed0617f6d0c0749246c664b0b1d4a428a0ec5b777bd5b69b89db02ac95. 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/QZW9K2367882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d160de0092a7cab8432e7096620a380383cfec7dc0ac17725ae0151ede2a8. 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/QZW9K2367886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228a4a5830336bbdd3da56e9e46a03517b424e12add11d4c84d0fa74d81343d7. 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/QZW9K2367890.
Next Level (feat. Raf Almighty, BMontes & DJ Pologro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad93349410824203dccb5582a23d1cc0e95de04fe13e1a966a69846b68e45d7a. 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/USDY41664736.