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 0x04aeb78fb6485594a93b373af3301f4e2cf9e0d34be31f2efc63f8e9255966d6. 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/5e74a413-77d4-4759-a95b-bea29c5386ba.json and https://artists.proofprofile.net/proofs/artist/5e74a413-77d4-4759-a95b-bea29c5386ba.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 0x0fc73246a844d2c3f378c94fe86f4501d125193bb8a64c9e3bc8a7cf3bad5ca3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6M2527713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352ce2b31452846d66beffa321ee30b6a358be83962c2e4033bc81d57989031. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6M2527714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b38712d8966146d3fda0d57e2e13caedf27ba9b4c900224e83768932d49a39c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:50:51Z), 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/QZK6M2527715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe5c55b32385dd3a8a6b8922f5167698d31e991c2a829076a7774de97d8ff2b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6M2527716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5251656c92cac96f97cb99b9af6cb45cfde168d8f0948d5a08e8689f7179038d. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZK6M2527717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9b376b96a2d0861bbf745ec6ba542afe2a9f5a27eed18d2e6b8bf50d6160d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:23Z), 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/QZK6L2591893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135df88b026866d0f29433c52dcd6aaa5515125198fcb9ce70e5c5ddcabb8eea. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZK6L2591894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5dd14c2dbb5ac1c0106128dbd5b1889c51beaacaaebe37764841dc5e0ccd77. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:24Z), 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/QZK6L2591895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5367669964645a8d58303295072076be21267b1cbec0c8e3106e18219a13a990. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZK6L2591896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734f59628249400fd892ac8e8842097353c0cf1f836e6e8ce1ac926ee778a3d8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:22Z), 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/QZK6L2591897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc0e4504d611c6bc2cf5a67d2cf42072c0e8d0d0d27b1041a563ef1ed347899. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6L2591898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4765c84bc8181885ff8f61a274c3b315fe88ee3898eee6239b57977c8d524a69. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6L2591899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6c2a59a5e0a8eba86168d6492ad89bf97cf02530a0186696b9806999304d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2591900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78960138dc6190fca108db535229997d96abd6692a25ad87bd7bab766e1ce24. 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/QZK6L2591901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a7ba075fb9a36280efab0b72eaffcb5db0a1eea13191271f06050d0851dfb0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:26:39Z), 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/QZK6L2591902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf316a47081948fcc71d8e41f415dabf86b3c54be60a9dcd02ab8c26fbd407d5c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6L2591903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abba07c4823d6441557c01007723c274f83e0335684a8fbafd7fb64e1c69313. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:10Z), 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/QZK6L2591904.