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 0x4b257aa7c965ba3bedc8b0d04c40b863f9dafacb04a91ecbe9d0e13c2c824639. 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/534b60cd-30ad-41dc-a3a9-35090329c8de.json and https://artists.proofprofile.net/proofs/artist/534b60cd-30ad-41dc-a3a9-35090329c8de.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 0x372865b2a99459c2422697c8cc81263e4f7b1ad69b2b9f18b8bb9abaa71341f9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2P2110673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f28822a7178669ccaa0f85e9c78826cd8eab5ac7dbe3ae81b15857ee345ad5. 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/USA2P2110672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf5c1b82d97c73a6772950544e226049138263103515834fe7de461bdb543a4. 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/USA2P2110667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7588658742b8daac09b9a9f91483cdfbe6128b57df5019d794f89a26bba6c3. 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/USA2P2110677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2aff599d4303277dd0d2614ac9debf1447fd1b7fa719b6c8d5892b9e0abf83. 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/USA2P2110676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caa719a78fdefdb2e19eaa0767e6f7ad0a4c9f7dc4b1e9e318223f11c95d2b4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USA2P2110669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f70e2a44edd516a6c27f77aec7b38c69321250da666fe9f254b9f0d21d34f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2P2110670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f224ca22fb3d7254ba5da2929d790cbaabe46b5927809d793b3f05a0fe7dae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2117918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af85f1abf18bd30d7e24ca75a045c6a1bd205e81bf3bcc9f153c3fd57182812. 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/USA2P2117920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64a62127d2b1c77752cb0c57911947230192ce93e15eea976b9fefcc196dc5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2152662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fa53a24df8eadd244fefc6cea90719216c3a71d83bb4239996a95c6e0ef7bc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P2265422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0814fde262063eccd4d7f2597f7e593d5c1f771ff89700aa04d72a0986f2092a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USA2P2265427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70109d646d614c6228aebeebd2afaf54de1f2d9bd8d91234af2684fe72eea7cc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2265426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9e400743c69cee966017665c9ee4d6636fe4e64c9cefa646422dd916b4bc0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P2407489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d13b861597962617eb52580983b3487c95ee2c14a9f3fccb9514f4c035e1e. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/ES71G2420483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a211f838d67dc4bbce3d6064a5cc2cf55f83d61056278cdb15b4469e8d0565. 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/ES71G2421384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e60d9a6382d2503314db6e88c82b36b4b53887c832544f71ec71c3ea33f1dc0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P2502723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a55e077b0aede5c4991cae7566845bb8367c029682095a02b633c50d4c18fe. 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/USA2P2502725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d968295d99d9cc5d483c06ce117ac3ef4b12dbc84b40b3682e9ead6757bfa91. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2502727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf34525bff4df9939f6a02e9a585cf4e17230a1f6158fd2aaa7fb4c80bc5cd75. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USA2P2502728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7253481c90dbcbbaa133be493582d29ed2e97baf57a01e3ea5c8bbc96bf2a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2502729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cc787e0aabdc906188081b81e88ef41ee361a503f13700f7378af29a3ed107. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USA2P2502730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed39ba042ef7d945a04eebf3a8464f20128d95c2851f84f31a08e5c2829efd. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USA2P2502731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a9553b9fbc02fb1de13ef6226461a3119817ef5099457be7558768fe5052c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USA2P2502732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76acc1b7550c1f38984f674cec48cc4fdcf692ff27c9ad9fddd73872e0244598. 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/QMDA62147355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c9789d22538bb43abac370f276e37a0fd888e17dab7f0d38f0329d2ec0b82f. 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/US6KA1900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d895f523ec16201e9ee6246f628fa2c229edab5f33d29f383f5b5b89187da4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ES71G2008448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed4ec54b80493f172b9edf18c1b8d934e882df23222c9f9452d5deac15fa3d8. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES71G2053625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23fe4c6ae295847f7e396e086707d830663ff20450e6da3a6a2327672c49495. 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/ZZOPM2230468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd174c734235908fa471258f77b266c6118f1c2874cbfd95ff50c717717a11d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DECT11900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1197d35260d130efe1a027e22338a6fd91274c31dcc7d851e3dd62763efd7b2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKPL1937556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5527deb3832fabf5e11dc4794df3984dbe003d49eb2958384a27aea9335fce2. 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/UYB282410106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acfeddf5ea7a48f121e1bec6fdb6f36d20630961bfabbe4f57aa6dc5dcfc894. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES71G1926043.