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 0xc0285fb49cfee0fa7c6b2aa51be61576dbdc74a73077e4f957d8d79c2fd9b520. 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/2d51b042-4596-4567-8d25-24236fe0bdff.json and https://artists.proofprofile.net/proofs/artist/2d51b042-4596-4567-8d25-24236fe0bdff.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 0xc4cc9e8fa0df5247f7500490c1bd33c08cf5020946a496992500c155d6b07654. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:24:03Z), 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/QZTB62343905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b84133c7cbd7304ed278e1c7e047b5faf91352c99d85fae19960ce9a69a29f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTB62343911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3339857cdfe0f158075490d8e50784212584c9e0b32d19a17296613d9a9c2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB62343913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e93ba6eabe3f4477899bc298e8fad991a08398f51bb1dfb3ef43db5c6c9db67. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:00Z), 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/QZTB62343915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4795fd56b498fc5c36ef7c2eff30118957c5e419eeb1ac57689096e71ed5eb6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62343916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce19d47ae02c581d5ba7c0de512abc94a7354608d9e03d7370fc979b0a661e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTBF2435132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35f31403e3a9491d888b1a5d9e5e2082e6b194f8ac9767469ae648310458ca5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBF2435134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e7ad17dee1dea619626fe57367de3e5b0e677090522a25b8b818340117bd6d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2435137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123d1d97d23e91599fa30eec7faf0ffff33bb3bc8fa1fd689ecf6c7e5c842a00. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBF2435141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b34995427eb9d9ab5bcfb011e20bf2607b49466c6e5d1b2a0960192c823aeaf. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZTBF2435145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d874d341670a5230d3b5488a31eca449e164de083a8ca43ddcea06a55ac965. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2435146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dac6ba195f4783c6280f2f26c4fb014044136b3b4a899c676b1671c2f373c5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBF2435149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677b79939a61d5a2e41c1bc0511d06b17dcc00a677d3d0abaa8c0bd2cd14f3a1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN92402878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ae5f2c7fcd9fc5c551932b03adbc512a8c5d0e7f5f5dada384e13158f19972. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92402874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41191e876020e890f465ca2adb3849dcf52d4a491be48b8ad37507389fcd2480. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8029e723d5c41e1540ae717ed8558b1022f1117122755c5d2afb8be554f17b0d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN92402882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdff21a233d1e2ff700205e4a9d7d366518df5dd221faa060dac40b7e7b5f1c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F22474603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51c7cb15537807eaa34569a8eca269608ff8a1887c4b470ce7dbdd78d37a028. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QT3EZ2448873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f5f52efa4d311a376861b7916d7bee02626288e79308d0c5e647747be24ede. 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/QT3EZ2448869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fc6f35a59959a239b9ae5c62ebc1ea54612e9bf74ed3c3e9d416f38e8846a6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EZ2448872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e11eb99e1a13d128bae3be4aa4476f926f722f539f1dc9e810a40f5ec61fae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3EZ2448876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a55d3a62812d691940a89845409a8051821e6d45c894492edcd2996a26b02f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EZ2448871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d715de9a8c25b73afd4c68b163a3e9c7ea5c747c8cc1cd839f1f2baf1684ddb. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:48:20Z), 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/QT3EZ2448877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c262b91806fdafa949a9dcb92049bbd52e4d06071b59237471787f2d140f9. 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/QT3F22474604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973c96725998a6e87d0862a5d003d69bad40159da54dc8a0aad9d3610e31b5ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3EZ2448867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754bffa694d70dba7d1a22d1f9435420b9842af9822d41640dd81705e8e2f1bd. 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/QZTB22588748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb15eb6cf136fc81b02b4f30d3826ccfc4f8bb6c269aea248a3bed9a0a2edd9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBA2551274.