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 0x11b53261d46c4d622d67fbe47c7db3da597ff50ec1eb24ca9deaf6f0d9352cbb. 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/d2a5174c-1691-415a-94f6-ffbe980e5a26.json and https://artists.proofprofile.net/proofs/artist/d2a5174c-1691-415a-94f6-ffbe980e5a26.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 0x93fc031d0e5476f74079736eea6ada8fcaeca8b1a874eb04810966f8fa1a6f87. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:45Z), 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/QM3DF2193092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6fa4caadbfefbeeab454007625d6e78d016cdd86c1ac340d4d54889faf466. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM3DF2193172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58836b7e11e8e70ffba546abb0da19cdeddefb191a17cb798fd8fa2f11f2663. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM3DF2193173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ce847410a441fb6c8d7e74013f57f71dd5a179960ed43253e13fc42274328e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2193178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1487f2a61cde9cc926042a8b43f48850e7dbbf492accdef44e043a774017ddc1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM3DF2193179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3023c778015cdb86ce4bd85e19c2df8645e9d4302011d2844ef7a46ea604d9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:02:05Z), 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/US3DF2252895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d1e906c1d58dc8ae017b36d38f52aab9b5e73b6d0e8422d9d1d1f5a2307939. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2262308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6703923428580b559fcf9eead9850e3e0cae00596f2aa95b6f705c5f4ae096. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2282153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e543b70f8cd95f9b3c91c9b820a1783f01349e55da2e513c4db7b62a6cbe63. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:00Z), 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/US3DF2262298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472720fe55e3e2f5be9cb0cb6e1796b6c8a80c9e204d19c0918784c89b4ebc8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:07:41Z), 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/US3DF2262299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9488d7ff8b68da793b32c3daf037b1c666217efaf2e4dd3fa85a8473039218d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2262300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9a71adb3a7b6940975b889f75da4ebf4ad9f0698938f6ccc620ae4df508c8f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2262302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca7d5155552bf21cd342ca275136c8774a242635046804a78b4839a8f19062. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:29Z), 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/US3DF2262303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0354d3884fe64ddd3080ee63e24acc66a48f11984ca29445eb0ddb85419a43. 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/USANG2250165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c06fdb609a063f2f03035426467adc9c3e77fad025eba32a6df1dacbc93556. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:40Z), 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/USANG2261859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc49155234e22afb4f33b4bbbce04fdd6f78b51641d4ea3baa3e35323878984. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USANG2267298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477d6f9f3dac9a9831336c6f2c26693883b31a86e26830752f9b4aab35a74445. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USANG2267299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cff6551df41c5f1943b8554c3e6953db3825c041f9fd4e76bfb94978815ab3. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:21Z), 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/USANG2267300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f110e80313cc84d23b9ad67818d39b105e172585b0543814058878559545304. 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/QMANG2250031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a81b90e4e56cbc77a2752ac2130cd7e4527d5936acbdae8b92a4a1f9986144. 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/QMANG2250032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795958758b840addd796085567f2a605c87163788a36b5ae47d0c9ff7f2acc6. 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/QMANG2250033.