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 0xcd7a2b6e1b31fb8f407ccd678c1220d2935cee99ac9e7886de29d1ac6c7f27ff. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8d909ad-3458-41ef-aef8-626e0c25eace.json and https://artists.proofprofile.net/proofs/artist/c8d909ad-3458-41ef-aef8-626e0c25eace.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 0xdb70eca75e285397e5abfb9bb7a51e780a768a1d2f89bb2e938454c4282141f4. 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/US7VG2392222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ec629736a0a963cc9909d6096253bd420b11e266d57e6b5b675ed596d6216. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2268910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad921bcebf00cc3fc3d2f9dc035f7a64d12add901bd3c369a2e8b9c972bae04. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJZ2260984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1122eabce252ccfd1a4c8d69a3a96e9a897a479c9851abac3624c3af09ebb. 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/QZTVM2266401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47594839bab5499839827d62fe8ab3fce3e674c066206d8a464fae4604bba9. 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/QZHZ52111771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0266822628e9dcb5e98cbd25c48024bd254ae0123dec24922a67f598ec40ff8. 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/USHM81983352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99aa5101f24e68508a69c23e28a34f8c86a1e9b97b05abb7e4e721bd0f6660c. 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/USHM81983353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da704e32b609e7b2fe26a7d570ad7796cee1bd7184b070a437ffd1049c64c8b. 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/USHM81983354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d8110bf1dea8da4ed8c53cc9bbaaf7a19e23725bb74fcf75d5ed0d9254539f. 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/USHM81983357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778709f1a4e9f9c1cdd105cf2c5e184a2d12bfd06ee05ba071f5e2424568d1e6. 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/USHM82474510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb4dc7a8558623f8abd3479002addf0e2c15d5239a934d55b9d172e206800b2. 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/USHM82474513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd2b78d766e630a4006d811cfd6610eaa5d398f94e929172dafce8dddd3bf41. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM82474514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e7d26aeb2f6e95bcb2e5e08c94ff519860baf97e7dff86baf910aa04e406b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM82474512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d134021f4913f3e906cfc13902e1cf66ba9607e40cf6a056cf90816f73648c3. 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/QZGLM2429826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc85a61417c41591a3385a87719eaa984ba017f1f5614f79b9c6c4926913b22a. 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/QZNJX2359239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64680184dcee23cb3de383b95ebd291701253706499053268dcea8ef89124a. 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/US7VG2349831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad921bcebf00cc3fc3d2f9dc035f7a64d12add901bd3c369a2e8b9c972bae04. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNJZ2260984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ec629736a0a963cc9909d6096253bd420b11e266d57e6b5b675ed596d6216. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG2268910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa996a4ac8bb9acf86582aa0733ec02728aa6faeebe408b04b0818c1479ee6226. 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/USL4Q1874233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a5d89210a8aee16c8f4efe05efa77ec476cc15e23ada97596e3f4625e510e3. 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/USL4Q1874235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2b816653e157c726d6f4061cf09118f969297986da0a545bcc061656d4f3f. 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/USDY41895221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2c4a72264873bf989ff6a9438e6f89bd9adc70ec5d520655288029f6b6a2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY41793996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac59ba6dd46686e5a3bb56e6b4b63a8fa25afe870ab10ffa812f57f5ed2ac7e. 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/USDY41793997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a27f9640bb3057ae10942bc519f3bcdfe98bd8ef8b3a906babe5ce1d0bd10b3. 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/USDY41793998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2244f3752c24a623aee000dac242078988b299c204a3425e37fecf743c9f465. 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/USDY41793999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf886ae1529be20189bd4edf366726aa719fcf53b69c1caa7726fbfc7754155c. 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/USDY41794000.