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 0xd9edf5a22724feb92ea4de1947fd4f7197451aebc64ef0d4a43025e4892142f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79fc8134-acb8-4a3e-8214-019de0e410bb.json and https://artists.proofprofile.net/proofs/artist/79fc8134-acb8-4a3e-8214-019de0e410bb.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 0xae404399b3035828de758d7e1a9bebe0232b1dcdeda97946db38d8493db584cb. 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/QZNWT2181111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89963ccdceb9458f666262124e232b7a3fdd29f9027bf483e9efe1c53003965c. 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/QZDA71911936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fb1104e44b954f3bafdabbe9ca8c8644bcfe87170f70f975c96e80eba4fc72. 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/QZDA71911941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e52b71941c5a1d1567aceece05e278f9e35a89074150aee50707bc872d8e7e. 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/QZDA71911948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24115ab641f8c66a7af47fec47d11c566189a90c56302719a0b95be6a944ea. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZDA71911940.
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 0x3ee1c50e8b393e5625b5a32a061cf97bc8badbd39f2c7c8acec73b9d662d0a47. 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/TCACE1593325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6447d40f83c387a7615b64437c7d8126b2493a9d4b426028cf73d6ab222f3212. 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/TCADI1767635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f82592118d877c8ba5d5bc8edfe93ee8959376a09b63053f6d9225d7dafe0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCADI1767628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0c10e7620f3f5314941fb4b42a8263882106d5a10d373260a079859f5648e6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCADI1767658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbcea7c52de20180c21db3cd880531a988c8823363c0694e340f6dbd5b4dfc5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1116026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9244be4b471be60cd8e952d2c81820072780b8868e72e682c0ae97f9c043b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USUYG1116024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17d36cf00547d20e6103bdccdc58411d65cf9fec263050b55c3796d1ab423d2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USUYG1116027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133253c1eb878eab4b363757b15e0aa4b6b9e0ed37bf42204051d63bae38c584. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USUYG1116028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569c849220ebb0b7b0c7e0098fe5a9f5a9b150d40016e25e48266d9b7b27a12. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USUYG1116029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c1b8350eba1b607c0355588e2a103b71cc193ee76f6dec47c47c0c178a5b6. 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/CHF032417864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2869c3edff8d382da11d35abef173387077162a328539ad32049b37cba699e. 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/FXR592401270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a2f92fa9896ef6cc0ccba7d5de37407568966dd121b9d0f766afe4c2b7bf23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQTR2301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c9d7a1c706987c9a61052c2b0988204529c9e457c3c5b48a6b532af1c8e9f5. 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/QZDA42309455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20046baa160e111da109c7cc6da4b2827673c615980c060df10302e293944270. 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/SE62M2119234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94815c40e06b2a0504c3baddcf837acfa9694b8b62279bfb71bc92161c9588. 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/SE6HN2193894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997d31839890aeb1586aacf34e3d664d62d5c6000fead94e444b304b59b112d. 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/QZK6P2548924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5675890a6102c8d69f1aa831f143d2809241585699d8c42ce88e4f639e7778cb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6P2548927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea35f86889adb253c078456384629bbd41e8203f15b1708cc6f343428aadbf0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6P2548928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d60128d7dacc60f2834d829757974fdf159f6e20eede6dd854cbeec10fa34a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6P2548929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fcaef21fac84ebfeff0816cb35c5f88dfe2df172051d40a9fc74435cc9da5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6P2548930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84480edcc0836945fbd69629b6a2ba34ecd40a9ad140d688107f164375ffaea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6P2548933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d850d512f0b3567b545113d177ca84b4eadbbf6ee5b131f33bed1a6235dc4. 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/QZK6P2548936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235765e2402f6c85d43d57a58ec04e05aae1eb25a9fdecaf06ae2cb20ece0e1e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6P2548937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938189a316d4ba11880b026e0b42078b33fc597466a4c7847db2e477d15961d1. 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/QZK6P2548938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ab8f645dcad69a912c54969148889b4df6b11e546192c1c158c9119037b1a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:46Z), 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/QZK6P2548925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d767db866bb24975fa8fe2ee31b21ac346a7ae94dd77c39afdaa5b00bcbb73. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZK6P2548926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b0cc1a7e1b4a402a2237ae321345fef55db6bed2d367e219ce243f79f5ed4. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZK6P2548931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1ca3938376317116ef35a84a6e2cb0c6a446efe419b8d6bb9635dc86d5511a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6P2548932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa363081564df52cce92cc789f2f7af8f6abcad619182c6825c412d4bb3dc0f8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZK6P2548934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571d1c28fda40a310afbb9311f2d6ae566caf99b54002d2a80a8ce6e5492f87a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6P2548935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98932133e001f8e1ee2dd0e0cdc3d224ba7143fcc035d84da5352f5f9f653f5a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6P2548939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ad17aed16a0f8ee14e52f3e5a4c5319e8e7c138f53854b6d247b46de99a9c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6P2548940.