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 0x5c9d7e13024db84a126e3a6e480e4a4fae32eb31a767495a0a73338e60bc197f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bc4af7b-0d18-4cef-aaaf-9736f56fbe7e.json and https://artists.proofprofile.net/proofs/artist/4bc4af7b-0d18-4cef-aaaf-9736f56fbe7e.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 0xebfdf6d8d9168d68989dbf99c520851e5b76df6f37863abda0e216ce36cd22ce. 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/SE6HN2440126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e63f4250a65c66104e1b42b800739df6f992639251943dd3361732785508184. 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/QZMEN2380372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0211a58909d12d10e06399665e155d4f528930de89f322617200e0a1a8a1a7. 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/US7VG2590772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6b934953afdd8821f5a1ed84c1e54a4c457586b29cdafc35aaee65c29016ad. 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/QMFME2479084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c9a1cf8f3820c1405667abccdb7d9940e41ab71241a8801718747d4f3eba0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ772438867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66872c463d39640703d7e3953b5cb9063aff9281b290c8a9e10db9132db0e230. 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/CALVP2455552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188d23807ecf8d1a6099c0dacb5b8658b27f67412f6e07f61465ecbf0a5e70d. 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/QM7282412068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7264f19c3740f3da44857074c5eed742760aad59ec5d681dfa2ecc53d28da. 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/QZMZ92401854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1876a77b00e7c4862aaa4df6a034245bf5eb71198565768d9a5e91d4a4e3b376. 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/QZGLS2468124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f9b5c47acb292fda2c49ec3a21923cb2e62fd47738d20a341325ac8fb1736. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2451811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02bbbc4c33bd9cc37c41994aa907014840b225f318b8df52f45ff8ebd8d2d9d. 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/QZDA62401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ef76cd58f9f380845e3c6299f5d6fc8ff4e8df9339d68eae7872e37cda735. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTVM2352969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c8a63987625862d3555861a621aa131dbfcf0fab4ea8470f9f60b48f0ec783. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA72331978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5e5510141a4133f7f9ad74630b8bcbfe8a3904544fcd33253986946bc20ae8. 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/QZNJY2348091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2d59a393b3838de439aa5d9196d1ce2afd42843fa55898274ada952dee036. 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/QZNJY2301199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f4bcf936f33a2c5a04efff54316b544b32a936e11e8768889eb006c4226e4. 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/QZHNA2372968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e2fbb846da333b7d8115fce445ec6a84be46ebbc8fcb736b9c29f602842db6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92335019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b9bb98e41d72540cfa42ed506bd90220957aa686f524bb8e8328d4d0bc9c3. 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/QZHN82399837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88894f762930349aa8d3402a8b2338f04c19531a9b53643068bd83ab3ae066e2. 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/QZHN92318542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adcdd695bf1bc5b520d3dbdb900f6ae56f4b4bfd5c0d1b6af7282adaee4bf1d. 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/QZHN92310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0089996d582d1b212e38cc039026df15e7db01bac15b3c5d9144d868f73ae. 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/QZ5AB2302326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ec07591d6954173ccb267f625d5f77544b665ae61a01d7f68c26e77ebe684. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MX2832264238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c742057f7a2ee2d5037b53602154eb64f46ce01c0161910283c71d85bdfef. 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/MX2832251742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9423871671695d6a4f8bda939ec82828f13962a80a06d9f4d1782242a336cf1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MX2832147259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3a2aacb83dc3fa895db38b15b74f15752e9fdaa4897b73a683e535d9e82f7. 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/MX2832145995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e96c308ecaa5a92eb850384eb57445e01e26f881748d970f340cdeab81e136. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MX2832145938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8820efad8362ddc0242e5d8a8b803a8da0b55d8a5b46ad072559aad00c3ea7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2493964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84801bc6bbfdbe773c9f70058eb32db59a58b0eed8a31987b14b157f5e8268. 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/QZNWU2446546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6d9c96e9cdb0edc8c99be22984c461957211c0ccc3ed3f9fa6a13403748c9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA012502656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51464932f7f912fbc137fd567314f8376c8e605c7d6fdd020f1ee094475d0e13. 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/QZNW72408356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d25d403198bb295dab8794a4fed233b6c11dc32a011fab827e4d1b54adfdfd. 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/ESA012532662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da266779c4792bcdac84f0bd8f473c064766923ca175cc93f7a2f085f7c75f. 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/ESA012532663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b62e98aae303b378aa35b154975cbae5015b5e419aeeedc5db03659e9f9403a. 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/ESA012532664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41984a6c7026e96a9246e669c22b8885c36be9f53cae7573bedf9a48b7b15db9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA012532665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bae312f082e7b72b42559f5ba385608b875606b4d6233bab392d63bcad9087. 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/QZES82539782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f8205bd9db6b2d4724f6f0998349ece03d2263c8d4ee6ceb3436c7691506a. 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/QZWFR2391969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a96c31d409be822aa15f8fac71c4bf1ae67868cfb9c7c137d7a6563e439029. 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/QZTAW2492999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab2409e1f1f7c5cc5640c41d7a192c32a11eb19f8d6428329110d925aba63fe. 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/QZTB82359961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60276820944292065f3be50f11f8fe42559e312388f3cc6b5a37c6ba09ca4d. 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/QZW9M2439527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea419b25e6ea6730fe79b3808226421b908dc7e00139b4e97eef11cc12464832. 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/QZTAW2441271.