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 0x1ed07555baa9bceb48c85b269d96022875e6f7f0d597983d069ff74e63599ae5. 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/59e1b212-2639-4fb4-baa9-87aea125528e.json and https://artists.proofprofile.net/proofs/artist/59e1b212-2639-4fb4-baa9-87aea125528e.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 0xcba2ede4245d7aaf5a25ed33ad535c4a8b32020cadd0e87fc0281acd18dcdb24. 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/AUMEV2402556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3cbdd365f032608f3c575bc0b8799cbbf86de33b87fb86488d1062b433c77. 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/NL7WN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528da6c3c0f8e9dc1e3f869b7d5731dda1e0b8f8c4a7ea930ce0348cdda9827a. 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/NL7WN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3f8534aba39195e23cf7542cbbad9053ffc3f7deb25921bbaf5da3a1d159a. 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/NL7WN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ee90ad194fddb791d56e78ae47d9c9cbcacbb014d0ea4aefcccb2b3d99768. 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/AUMEV2408943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cdb4b3402ed30eb3b8c89b573eec72e4d6582385501f9810820dbc54888d7c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL7WN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f90f10095a7c0e1207a181094f21b94401274d3c7e98a7827c7b240a775f4c. 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/NLAM42400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0594448ff11fbc4e9812db377669d618056d0cee9cecea1ba8f039f3561445e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:51:34Z), 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/NL7WN2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056a7e490423d83784daba456ab2de949d99ce3a92c0ece5376c19747b7b9712. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NL7WN2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecd0c6c0cadd394146dcd436b89f59821663bbd52e39620470135b34628aac9. 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/NL7WN2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c284fed07c2ce4692b4cdda95e9f8b7814c1dc97ab9f5d98e7fd8ccea49fa. 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/NL7WN2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7f63233a56895eae4dd05d2a0b8b1e2832eef2464f6ede05fa0f50f5cba95. 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/NL7WN2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23d1469314b4e4b24fe1559846190616024ecd3a55b7fc508f0d871b516b4ba. 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/AUMEV2370086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9716fd62710b7d7bd2611a65dde25b4452bc956f63e45885e2846b0053d0c3ab. 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/AUMEV2370085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a7e18f64a1337bcb5c8b1f6f8f811eabd91531862ad5523d0cbbc3ad2d8c1. 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/AUMEV2370084.