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 0x8bbcf0cdbf47c04fe91eb849aab51f28fe1b2a898dad442415aafb9a06e1792b. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c5e6c75-3c63-4dcd-a34c-5f0f6fef165e.json and https://artists.proofprofile.net/proofs/artist/1c5e6c75-3c63-4dcd-a34c-5f0f6fef165e.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 0x58004ca37afd221d44a08ad8c195bd43e0a58a7343f9263b714e388306374d4a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA2Z2334146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f5a2dfb6158a328141f3fbbabd060de77fea562af39545ba77abe3a39d289. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AEA2Z2329434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cff3229c380b95b20dc8e4979db1ae538d8a924ccb1888eb64d9808ac1e4d8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHN31910136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e424b8887d6961ce3c5b3a34031e22c300eb53dde9e121dfd4cfe4222443416. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN31910137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89296d5dc767fbaae3f9ed2234dcec36d3edac834eb72804f290345b4729fa65. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHN31910138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7fd339337e20c35fbdb76dcfe68c9b31993f2eeac165c662c0c575c2a1e62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN31910142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136555a68c2cc39ee677820c18db1cf91b250b2e7562ceddf338cbbb4e20899. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN31910130.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02405c0c67393a0356e4a8762d58ca32aea29330f2a361d2e26b7f5a8e98ff. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHN31910132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf290cf2e2e473bce2331acb33976901fdc356ecf56ad319ab1da96620ae48a8. 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/QZMHK2516288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b1eb542321e0cb9fc6a6484b072aaf34284b1071c4f84b20977163bda7cd6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN71922020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0538d5031da253caa48dc5dda5b720d542edd53fe12d70a5bd1712fe712da892. 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/QZHN71922022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f41bee32e43a408beca7fe43977615c189f51c2c4972fa8d7827c3ff07fbe5. 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/QZHN71922024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d94c60c3a8764952f6fac0bb7f5dab88f8418e3016df403f441f3297cb9c7f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN71922025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e63883872c2b80669aa2fa63d2d7acef83e2b21e0f9e02a816c7d5d092eadda. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN71922027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302cab9eec4b47af58db4148c6f407a9806804dc2e676bb1b24fdf327d7a146d. 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/QZHN71922028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bb4a8fbf165e1b5219d41b74a1daa00afc969315116d294b7e0213e53a453d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN71922031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6704ea2da8fbd77d7af4cdaad361b7282e73e71330a329f9e067ff1a3a7a1e14. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/RUA3R1937027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee653081cd8c48becca0c8a81e83e244b37e7fb24b9b7cce37ca6746e97d40f6. 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/RUA3R1937423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1974865432ac1e6830b511641f7d48a5c2194036cb3796e4aca31abea7adf4c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2384492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aac9abcef39f5694cdfd569c616cfc0b16575c473a5a6b0e01025c568ccccc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2384494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba54aa7b519a36dfeacd3b320f39c8d69ef49c40fa9b84d86f4a6668ce27855. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2369436.