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 0xe775ed93d620426a24540598ad5aca29d87968fe702dc7bdcfeedba2df464999. 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/1ac64ce7-3af3-4326-9cac-25ef1ef712c1.json and https://artists.proofprofile.net/proofs/artist/1ac64ce7-3af3-4326-9cac-25ef1ef712c1.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 0x7855af87870cb6f173b2a9d11ceb094dbdd0c12c8e011ed6791e548b03da84e3. 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/QZK6P2170405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2d04f2c3edb1224345c862543291ad42f3b4cefb31bdc4c111f3775717899. 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/USUYG1485704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01318c9bce81dbfc87119be2280f3528b4182b163b6b01c7b82db984277d8304. 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/QZHNA2438554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd37476966b7a4fd3f779feac49b11cbd493def5b052908c7f9f9a3ea385694. 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/QZHNA2438555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dea5e862982f0ed01879d4982d6f9b1d8b97c169e95d3a16349341e1e751f4. 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/QZHNA2438556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df5c407a098ff35d5bcd11fd9a0d9ee84c2a3fa34b658c1898b4665bed14d8b. 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/QZHNA2438557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f8ac5eb5b444a48557f87e6912c28cda3d6b7e21a0229def44c2d16113bfd. 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/QZPEW2412019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f53d25a1a58d41576fcc58a70a2c0b05c27ab3a0308acc2aafc67561361c37. 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/QZTB42315142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9cd6a372f2029b04ca8c1a444ea5304b5346288123f3d673b17e32f3b282aa. 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/QZTAT2392198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cbb437d668f881d5a06764cf2ce9c639f9d7a492b62ea7e0afe52509ebab0a. 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/QZK6J2306741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc35b1752cb150eb9fd7080fcfda7175163c97a49fec237b71c71d2e8334d6c. 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/QZES72377887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c2399ec25e6179a407af2a9c7b8366ab1588a27621ca4ca4e305709951882. 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/QZTB62274535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a86daa00600bd803dfb851c709e4f0ee1fa3174b4c6bfd838635b1f85c3c6. 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/QM24S2204885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59e681850499e6d95bb21d58ca1cf80c7a4fabd49160cbf8bb75daf412e057. 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/QM24S2202719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f315678ead63ac2d1296111eed76f585f4b43ed264b83bd050e1d5568ce14da. 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/QM24S2201489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd34d5c48f912c47dd39b7a9dbc5396b908dd075f1a80e7587ee57649a172860. 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/QM24S2107713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1935346e514dbae74f31ff247fcdf90a9a285c8ebad644e3ff5f504d967a3c59. 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/QZNWY2134629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edb8e3529983e2b96b5cca1c921f7f7ce0de4ac20000445ce2095a3e352c2f. 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/QM24S2106113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb358376571d792a267598e650eb35adb5ebb855f4820c980363890bb73cd4051. 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/QZMEM2157035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baf8aee144e3a8dec74c7d625a1903020c3cb81e51fd3b6ffee20fc57fa581a. 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/QZK6K2183744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aadb48dc84bf97a7743443dfb63e308df5396afd40a2c31ec9c4afa311d0e3. 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/QZHN62166777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef19d6af7a47dddc6dea9f8e052f2d6805c373ae2598f4156cb60ea01290d0. 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/QM42K1930252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e2841e5d1762657692cbe95243bd98f5494579094bc38e779140c0af23adf. 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/QZK6N2041055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f50edb75c1afb6027ca433e1e20474f3065399f7b42c0b29288aeb8167b8b5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZKDK2072970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89017c69ef1c8e143232079f21f39ec1095ffb0f0f76bb78801cbdc8ca5df40. 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/QM8DG2078134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d9a6cae86f02b6c80b856a946c602003b2a344af8435f3950bbf163cb388b. 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/QZKDK1925788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b117e1f372bf0379d49a11c8b98a60c6d2329626c3a7318c16ffdadcf8317. 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/QZJRC1912641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3bcd92dc64400cbe3f0fd1851adeea6be9b60d70dc9239c504ad444485821. 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/QZKDK1911875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fde3477b62f8f8adf237219881756fd7456af663d4e1e25bbb8f766eb6c5108. 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/QM42K1975512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429f24590cf707ae2e8d0bd05b143be9e537229d90940309f6ee6d1b8a1eaff7. 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/QM42K1991182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6f5d835de2a4692d66aaaa03d8fa287bb0d1fcb807b30adcc01ffdc4852b74. 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/QZFP52044868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ddc87e92ba1b2dd89bd3c0b4b7ffb02bfd969c2364dad870c83cc9c8b512ba. 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/QZ85M2038391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e355072b28d1433a7beee0c7d70cf7f8fa67152a57afb349e11e059e1a67f. 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/QZHPJ1959156.