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 0x7f9af97b3c6e269ee371e985560ea21b9aaa5445f04a73fd858c18893b326ccf. 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/d5f622f0-30b7-4743-b5d2-63dd2fb82556.json and https://artists.proofprofile.net/proofs/artist/d5f622f0-30b7-4743-b5d2-63dd2fb82556.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 0x03c2f80fdf31c87ddaa65454bd996c134c93fd632b297523a16b49bf6c46e9d1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6L2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d4d62f3abec699711b62284748c6ddc8a33273d0de0e4aa21772bec6e1f4ef. 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/QZK6G2204175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89377ed97cac4753f70b255b269599d94ed21fcb6547e3bd447c5a0f56c3bef0. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZRP42263272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb76fb805357bdcaabfaa30fc0e835cdeb41a30e86686007c49c3fb1cbe7152a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYY2357215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de4e1bf781be193661d872be3db02d3349453c264b688adaad6c71635e3f57. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:15:04Z), 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/QZES92313225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa55f1de64dd0c23b8393264fabcbf97ba0998b157bf52b87df583da6bb7c4ce. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:18Z), 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/QZES52435475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02acbe7cd94f9efec6060b577481c191cb21449b240f98148191845f736f0dc. 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/QZES52435477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8186558fc134f79bf946f8e6e0458b082d2eba50426a3705e147b19be9eddcd4. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/QZTAU2355425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab9372c1127dedce06917e7bebbf0c82c612a93da3ece8496e1144d6f4c9a5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:50Z), 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/QZFYY2447567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421cc9e95b1f198441cd1a0b636a730a7f2ba7587efb69e27265a6de99d7864. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6M2465888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf77fb6e5775e272c581ce7263f496f3839744d4fa577ce7240939b1aa332dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2465889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421cc9e95b1f198441cd1a0b636a730a7f2ba7587efb69e27265a6de99d7864. 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/QZK6M2465888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf77fb6e5775e272c581ce7263f496f3839744d4fa577ce7240939b1aa332dc. 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/QZK6M2465889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f459996df470d283e2b5af052e362f37144d46ce5267a4d3ffc2f4ff2c2f014. 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/QZK6N2313139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7f6fb1208cd816032cfecbac120f69517d4dbd5b0a6e31dd33e84ea236caf. 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/QZMEP2414373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7f6fb1208cd816032cfecbac120f69517d4dbd5b0a6e31dd33e84ea236caf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEP2414373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c98b19d533b5d92ec85feca99707460ea3884573d2adc181694825702e41b0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB42465812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd1edd81948e0ea81a7e7ea4e0244cf8162a7b963f62800ad7a0e6e2b2f4f10. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7K2420193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9442bc71a73b6f14c8c7dc389faf03bad3465799108f5b6d618cfcea2d2e65d6. 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/QZDA52534132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a532e96d35b9a3c1050147775983182cf996565b97f4f5f5b8ae105530a7e11. 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/QZSA72500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc851335b1ecc3bfc90dbea3bd6bd1766e76c6e789248b3542a80a6f32e6fbba. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZSA72500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ad312e282f793bc99aaa7395df10bba295e82f91d223ba65a85427dc7fd40. 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/QZSA72500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf9ca4bd607e38236c884b154a183e52f0d0e1d1432e6dae5d8487b26c82ffe. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZAKB2466572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8447698ad1a21d36f936569ddedba2053b33c1b95943a983cd202cd269f54. 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/SE6HN2347594.