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 0x9600690794dcaef6f5b4e40af9a46cd4ff0d6d99bf45e02e7769a6b824da3d38. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1f0f6f3-8fa9-4df1-bd8a-402205a6179e.json and https://artists.proofprofile.net/proofs/artist/a1f0f6f3-8fa9-4df1-bd8a-402205a6179e.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 0xbbc83ad2243e868ae387cd0d44bfed83366bc7bac3518964772c44062990cac3. 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/QZK6G2430837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61060c27596e855cb8a86483beaa3066cfce1464a45639c764251ea228816d35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP52199743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c63ccd16efba7187ea3e98c7f0ab2336a2fb9fdea86af96410adfe9e2528b78. 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/QZRP52199744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc1ceb687f2638f400805a7b6ef8c38b543baf485b6c7744259563339f325a. 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/QZRP52199746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e16685cacfc59f7bf161674e633ad7723c5e30e6a2cdfe5c752ad7f4a2c51a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:53Z), 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/QZRP52199745.
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 0xe67b11361922f9f4db712be1465a255887aca7428e71429827f541a00cf5f8ed. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZRP52199747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db39657f6d22c9b2f1bf30707e4a6c9103dd7e678d1ba8e6667053cb0144c49. 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/USDY42038273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86006b26062b534b96556eae5c1a470144de01b16c48af47df6b2e10bf1a97. 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/QZHNC2009600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1af309365f5d9f61dfccb1c46647a48e1715cefea3d7ca0ceb0567b39f39ae0. 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/USL4R2240369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ac424e8fef1594d82701e3cd05a5a7d04305979fcbfe9e5ae0743c5776c51. 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/QZA3V1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b88f063332b5d1ce7325890ba9dcbfda50cb85b654977b036ac8051b5d75f4. 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/QZA3V1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94a2899abc7cfb37cdd309c14ce77d424bc09ef6fbba0b71af8f69b054ee64. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZA3V1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3cd58d46a3a054e2f1c24cd896c968a907aab8d5206a7decc7942ce9ef37d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZA3V1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825834b6ed590f312486a41c40eba0534790e8803b3d0a853255d915050e8977. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZA3V1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf26b30fef6c3836d6d72365e82fa2d8ceee81ff532bc38b4efc73bf8cd54a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCADI1700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a474953b74071b552fc8a34e4cea25e9e3bcfdcc3ce8f7eb01b19bde29b124. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P2005811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63898e63aecf5ad0a22638d919defdd47615e71d483361e34c7ad820e0861ec. 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/QZ5FN2119803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bcf061cc18081cee4126733eaab5433a3d16700a8f80003275d8985ca11623. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ5FN2119813.
In I Stand Reloaded (oXLab Family Remix)