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 0x92e0ca9ad229e58bc39874ef55fb360422a7d206c1bdfd9f28de4e706f604f8c. 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/676a23c7-290b-4e09-847f-029758fcb3e1.json and https://artists.proofprofile.net/proofs/artist/676a23c7-290b-4e09-847f-029758fcb3e1.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 0x2d55c05e314dbc87e9cf2d8352cea3404bd6577a6e51f646cd243362cf29ca49. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTPX2433467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bd0e425871f14cb95df4855cc1d2fbb0624b81c6c6d3eec2d581ab8581cf23. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTPX2433545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1c099724cdb30f683681b573ca11e80a2213d0cfada488388b9dd096000617. 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/QZTPX2433536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75619854f0f6fed7f5be11ff7cd982fb345eee3ca1973adadd44765f2d9e0da0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTPX2433586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78199f2cb983928dcb45d7779f6965a3cd8aa0bcf6cfa032334b3c943cd62adb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTPX2433566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e24fcb6f16e221231141019ceb6496c3b0de1498d4083aa948e3909024d867c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTPX2433508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d3cb6889684ba426b7499927a78661dd4d5857d3c19e7a8edeb6734c09623. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:25:37Z), 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/QZTPX2433571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc708496dac8be8f2ae8ba0fa5ddebac01896b4306f0a021b4d0b04129b7f0993. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTPX2433569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2430487247b2108c346ade88884ea0f10c6e24900b67cd840b67f4fc662d02. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTPX2433542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64fbebee86dde3903167c78ef9642b653a50a2ac7581e7d599a3c9e33e08f21. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTPX2433547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf281c098ed7d90cb0260481815bc1137eb01e3f5f20838975424b84a1e7b706a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2433584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514f0487fe45ce702c3bb6cd1ed01b95f5f153275d5241ba93acfcc0e35927e7. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTPX2433435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20478b429e0828ce9f906c2c55f31a9a7b3e51e4ab4e46a63ea5ee5dadfdba8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTPX2433496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb8549dddf455e4f1c081c7f727b8c547f11490e715f35f84fdb45e710ff5c8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTPX2433544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09da5cd5630a99c5c69e12e6f869da03a728dd1849e3f19cc555eae8efad265. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTPX2433540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7e9b1f5239b203f3c75b37daf26708ea465b9de892c5aed8bad444c4e9931. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTPX2433550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed283826eb07fc6b34e6181b2f30cd9d27e890c988bdcfe86cfa9bb94b1f891d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:28:04Z), 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/QZTPX2434558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538659912a3159cf9b0e807d021e3e3d244e446a9c85256adc1e9513de9f2e3a. 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/QZTPX2433551.