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 0x3f377e088d1070c11253a7f281ba14326e24709fa72891c74071d391233db6d4. 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/92c09fc7-acee-4110-ac33-9365d9001f11.json and https://artists.proofprofile.net/proofs/artist/92c09fc7-acee-4110-ac33-9365d9001f11.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 0xc428f36be8562837046b6f758c3ed5f7ab2c8563722e523f76e800f454943a61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLD91756893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ee9e62caffaceb1211576cb3eb4dded8b52c02ee9e3b2bedf88d5d94482674. 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/QZHN62116847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118e7e0bd07e73c8a5b7cf6c5b921f2afe442ed0abcc4dd0fd8855808fa9197. 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/QZMER2291303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b8f11e8d7113f41ea2c167cc1b6a38518c9376f0e611126413d23a8f48eebc. 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/QZK6N2003792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888178fae811a125a8b8f77d8f1f554734114c095097e079b8c533e3d182ded3. 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/USLD91771607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2893cc6898c603322ead106c6b7e180b76df91d35dbe6318a7ef1d4b231642de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1708961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ca6193e55d4b2a7a246bbed7705534d6a4441995b22537f178fb47795d879. 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/QZNWY2074652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd5f2c2cb4012fb7072c460bad67445a40635eae7f30ba41a171ff12f56d43b. 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/QZNWV2014441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8654540135ba35e9d81bfc4ccbc2ee096fc44bf4fb7d6f9d40a4104114f025a6. 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/QZHN72074368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276900152802350c98b3f592f4696a31e7c8354cd97cc9243e70c054b57afe3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QT2VB2471228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8411e562cd9a07fce66cfbfb09c54f8f5745691e41044cd2a29fb07736a86885. 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/QT2VB2471229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa26113dca50c2b242a7c9bfb05329aed61577f3c3240cf3930c37b977143522. 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/QZTB82496370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f506440d6da58dd9ac89755f2d57f6015aa172b406c0eb021d8d6fb26c30c15. 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/QT2VB2471230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3561ffd1b011b2d27158db63423bebd70dc5a8cec5347c4fe02026d701685fb7. 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/QT2VB2471231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a94a2237b25ec430975487f915a61b6d5f66ecc58b27a2db500e55410ab88b. 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/QZTB92416480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecb8f42e29d7f82664c4fadebf96a8c55462869b07090433160a93262c65147. 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/QZTB92416481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b8b8e090957348647aeacf3ed5ac3d2bdbcfde09d75699df347eb6b620e09. 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/QZTB92416482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7c997b033ea46f78481559f408e3766c630253ae92c91c51415efce49e348a. 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/QZHN62090853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe0a968a81490eaf391265323f35895fca4219143462715308670915110e40b. 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/QZK6F2155151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428f36be8562837046b6f758c3ed5f7ab2c8563722e523f76e800f454943a61. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91756893.