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 0x09ce8956c1cc6fe3c2f6e7b7512dc87709848b18900da4b14efbb80657f2c6bb. 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/fd5d6865-3744-467e-a6bf-dbc31274942a.json and https://artists.proofprofile.net/proofs/artist/fd5d6865-3744-467e-a6bf-dbc31274942a.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 0x9b0e05d4cd46a956fb7874ed2b1298a37ab85455db869194b22678fe3087762d. 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/QZK6G2424634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f98d7c1e33a29d4b367b538534ac93a095e6c32efd2ebb2156d205f18522b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZQAY2419929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c1a43b23dd03cd7d61c87da8bb165a64a2f41f67231135737a9a7a1158cb9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TLVEM2464999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787148bf5d846b099919ce991635e029223b4fbff767d2c2f0a66dc6982f9f6d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QT2VB2403297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787148bf5d846b099919ce991635e029223b4fbff767d2c2f0a66dc6982f9f6d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QT2VB2403297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f480daeed170d26840b1ec2894d6c9ebfc0d745886215cc778bb991e39abf. 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/QT2VB2405234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c00e94e31179bd8f921c57cc618954ae029fbbf9ec4dc99eed4868b67913ca. 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/QZSYP2474416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b1957bb391f9652577ca6ddfdd436f5273b91f067e2a262ac5b5f962d8cd7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZS7J2495726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d05669b4381f266bcbdbf78c246380f8989c53ef8582e24d86a1e8abe88bb. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZSYP2416245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d4129c2de46086abb440501c083fceba9f32b23505fe6a69db526bc8be2093. 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/QT2VB2499221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e800f89a864cef342d86c526b56242b0928f9fe8b303d7e34a3bc4a0f8b8d55. 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/QT2VB2499263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e800f89a864cef342d86c526b56242b0928f9fe8b303d7e34a3bc4a0f8b8d55. 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/QT2VB2499263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbae21d24a7b733e7db913bca672f7243a67c1f479ec355176d5d5fe0e15c5d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZVEM1806583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989ef5ec284c13f3df1d6e829c7f834d3fb0441130093e03b38a35ebbdfedc0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZSYP2403352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa776d36ea2d3ab246c24cf31e390361d21979b65fced665b934a0aa0b7c158ad. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZSYP2454189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d600332adcc56a670c1af1f285791d46befa123a459dba88c010ba9480c1a77. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZSYP2419399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62583216d28d615c1a958b7b6f000f4599e6be08b65ba528e10e128767b830. 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/QZQAY2543689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4a2a9dcf60c6776a74a6d16465081a82e593152b70266e4ed5e4392faa3d2c. 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/QZS7J2552274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2edd3eb3ce9864b4d297e532774596ccfe32ab5729bb89a7948de67e00fd7b6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZS7J2503235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c9948990613b8d77b251f73d5e1cc7834cc417e5e153cd7c6129056e1e0332. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTLA2598119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f2ad5e7438d97e53dbb5801648fb1d44c74d2aa2b64d0ad7cdf28bde235c4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTLA2548428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf890e5fef6a205e012f13ec44ca4ac84c4797230b89c140814fc9413c4acea8d. 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/QZSYP2569500.