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 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 0x52a3b98d07296ba733f9ca4efee2b2a408aa482a21f84cac46b73d17b8d220ed. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3369b8b7-142a-463a-9601-33350af67dc5.json and https://artists.proofprofile.net/proofs/artist/3369b8b7-142a-463a-9601-33350af67dc5.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 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 0x2640c0eef9a84ad055be2765897a08f604536a9e4c1cfbf8a73a7d31182cae64. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843615b459771cb2e65d04faaa0f3be40cf32b58afbcc59eaaa7be2c14fceb68. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0ec617d5ad8b8cb3de63982bab31725f5660eeb82bd3783b342a59eb87ff74. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82501977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e72bb671d999f31c692e6ae4e5d3b36fa104a51ac6ada5d9d0f4e9bb2b464. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434526bff236c7a35c1a1ddbee3d432685c3716cd8450a26471eae93ed6b2970. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9e027eff6891b64a4732e791b1414031167171cc9d7c6a92c4b1f4ba24eab4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda2f5c1a48c324717a9d002fa475bb6d824a84b72aaa241eaf0dd66e18aed9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99ce7a65b561bf5406dce8d49ca425652f365c84b9057ca0406e55de4d0e006. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217329ab03968a1ccb2a2444ca0b8b036af90946ef60149e8da8b9fd4e434d1a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c294a1a1acbb9a6e8d516a1d905562a9dcde2a4cb5445f6692d51869270822. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54f6611322a3fe8584f69938ac22f12b91d61b4a3faec8a31d60c7ba345ed5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bfd8c64c919d7049a0329bcc556ddb03e274d5612d02c486ea97b27fc7a5db. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057cc51851c6ecb671d04e03ef0247c079e6159395acc50850d598fd14fccbe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3185d09d8a2c550fa47809bf079d795cf54f9a39cbe71ede3bb3c0ff9be6df. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a6b3d9e7140b49aea178c57328a913666c6fc629f1e70a95266c92708601fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31aa3ddef26f9a628b4bd7ed250bee55ee56da6fd54b19ed0613e16a76823b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c60c8fd69a470a56e9bbbe02c192f4320200a2d0d019ab1c7377960a1f602b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34459ce0aaddd83cf8830967ecfa0c241473e15e3874b6c74c02c8357c10dc52. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2214b57ebe0baf0a5be893ec541fda86e6ec51fecddc564a1491d2dd996caf03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2736218055aaa18d69d6a3b6583380c7785f1acafc5f15fab7a969a745c03ae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814c96fb650f810bb85943645226b2b7f2b5eccda72aa98f4d5b6a71b7355f4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZN82501902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac467883d08968fe8c4bb9f72b1d7d7516f89c473f34b54173aa5bc5b85eb50c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZN82501966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380edea8edc734e133a3ee1ec8f6d69de78b3a8d360d7b6548d6b443d2d782e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b6c39fa1031f4e806a0aeda98dd86d7ecbce9113e851a38be6f3aecf1cb238. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d4a402d8500a6f4b4bb105188c45eac4a406ca3acebd5956fe7467eba899d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637fb9b46db8adb522fe7116aa457890c6666d3842717b730107518d7384cb8d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad2a0106d1b2f712584ba0fa91d944d0d38ccbbe4a9d0e3e322e940cf10f86. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82501956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcf71e2ef71a5b49588835f4a22a8ad2bab0d4b39a91694baa40bdac1f5d767. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEZN82501955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dbffc00171a79ef046baa980617da3fc4fcdfa1099602ef6610f72eb90f264. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82501953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185c40dfefd51a008ac69f980315cff8b459ad45f00f2b42085dd88612954fe5. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZN82501911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca184a1deb573d037f51ff33ae0d69556cfee0d2f535cd03efa6ce2f7a186c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb7833d4015db78c4ce12cbc8646d027aef263c296c5fdf5ab8dbc089afaff5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82502011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5761e660833743fc2e25011fb63e9a46eb0064aaef727663cdba8d3476d534b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fbfbf674de0fb68475b8c3d1108ddca9ec68b4c35481971a88a572374c1086. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562cd2e0cb23d74ebf04e8d2e70713baf57a819875830ed9cc906f049ff2455. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82501975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2f765001f0ec06d84a4018a154bc6e62cfbeaf16f5d0a9180825522b5d772. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82501974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550f0a21a1216c14c7176c15114ddca66547effdc2dc1b312e3abcde75e5050f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82501971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4c1f88040ee5a39a5b728ddd72beef7e6371d928d73ee7227c45afa5a97a2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82501969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f9f6c00922ab6fa37466f587c099f9064ec7e4037b2a9ac134af420e22d7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82502012.