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 0x00f738a09ced90ac089941fcb2c02419076fc1cc0de882e90b8b1744e3c00f14. 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/df9bddc8-e50d-4f07-81ac-0b46f98c334d.json and https://artists.proofprofile.net/proofs/artist/df9bddc8-e50d-4f07-81ac-0b46f98c334d.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 0x8ae43de9d55eec7a4daef77682d578b84be13730e6cb482966af5fdb0a16bf5a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB731595187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3585fad013563feed48fbc0ea9d84559438c3fcd67491f575e60afc849a0f239. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/RUB731595217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552603acb0f5a1ed94fe96475db4537b44c8c38c5c22130652b64c38f17b394e. 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/RUB731597537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c4baca7efc8785fb397ea3e56c37ef5a67ac589178004b16b690c2bfe11523. 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/RUB731595223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0182fc4c661717875f650d770759f9830431d0bf50cdc7990284dbd2bf66da20. 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/RUB732018907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01691444e3c99a05984f1672685ad2d001e5377dace1a39f63ae0288826a76f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB732018909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf524eb9b28289d43e721487f74a4753ea6a6afcb788d6c7df8e249d7a147763d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/RUB732018921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf74042c0e7cce25fa9350144189f3f346d23285fd9cf574dde6ff00e6a1899. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUB732018923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d34701c34d49b879a77fd1b7bc1b29031b16e285a1d4d621a6db3a1632bb20. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/RUB732026834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9da25aa86aa869a185274dd6a87b9eb888b54dcdf77c5f938023d1fa67f472b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/RUB732039222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5e407fede159f06271629c9fe01d5953d0fc3c0d5a6a42778cb24d1ba928b. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/RUB732037416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88992c31701248269aebeb77dba0113eaea9dfe45ef7369e828954004c38a36. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/RUB732037414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd822ca5d271951e24f4fb76dab7f37f162258d3e6d0244e2fa8d6c2d7acbf45a. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/RUB732039228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f09bad95df3eb15d147d64ff8a53fbe7e75d9c88f54a20c4a8490c4dd626cb. 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/AEA0D2321522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15902226b0d93d8574287339aeba64d4b2cbd2f8222291eb7f6fdb78611a18c8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/RUB732050446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8edb332b1dd36fbc8079db929069a4f95fa9b05d5e029d69124d3707402f72. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2M2496859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a77e868295e30c7ffc5b4af2118f5ea0b4ee6a1d976ba3f6319062e386c6c60. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/RUB732062540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514cc390e8e5557366c111c38db7ad09fabb1c363c3102aa11812b249894e400. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/RUB732039230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99c265652321c4717a51de1e8a6e3231d86f846043c3c14bceb758495ee3a55. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/RUB732062544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61836c49a62978028e80f557161263a3ca667d094d854e02c7e76ef32fb7369e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUB732062538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236199fdc8f40b72c89be72a54557ac135484b1de38bf99e4b3a8608ab759fb. 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/AEA2W2530102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57237b130f2ca9a6f6e4c1de82e02f5e5fe93167403125d42e05bd280ee7114. 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/RUB732062554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61836c49a62978028e80f557161263a3ca667d094d854e02c7e76ef32fb7369e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/RUB732062538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99c265652321c4717a51de1e8a6e3231d86f846043c3c14bceb758495ee3a55. 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/RUB732062544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57237b130f2ca9a6f6e4c1de82e02f5e5fe93167403125d42e05bd280ee7114. 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/RUB732062554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c682457674c1a6ad1f8099baf868ce6dd06abb75389fdf18f8c3a7b66d36fc9. 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/RUB732078597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e88900e695f0937a01e273a6c8d6a1eb9c4432177343b7e6d8384766c62211. 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/RUB732078595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54545a68853c5840b4a722b06e18d90b2e56632bba2cde912661bf2168493d3. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/AEA2M2500437.