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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79556a2067e4514ff87b6771d4293d30687c38632d185fa54ff2b84c3ec86c0c. 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/f1bdd8e6-4a81-4460-b456-e9ac8dcdbbdb.json and https://artists.proofprofile.net/proofs/artist/f1bdd8e6-4a81-4460-b456-e9ac8dcdbbdb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d685b39d0c5e75116b654ac03a6980e7985a7c263975afa92b343b1a9f3511. 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/QZHN32088867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a3c9f9af0a4d134286fb1c494b03607dcaa4ecf7f98552869dad5949d9486. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN32088870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d507740744c912771e94df7bcef9c252f1885450a5dd962c47e667fad6db44. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN32088872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae1f6a38cb5e377c1d9a29db9bab54c82731f40006fc3bb0986a17fdd6c42e4. 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/QZHN32088876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810be26e1560aff85dc03af8c0240603c00027a3335856bae3e5e4d71fb10b60. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZHN32088877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972a2c61f6f01b5c8625596af5e302d7fdfca4ad9cd4f31b1c68292287056d4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:11:50Z), 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/QZHN32088878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b816339d189502c2603d5d981cf4ffc8d60f316c668a9b1dd5a72b8d191f79. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN32088881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63201af266c4c0a9720a6f2d25077aaa0511e695ade12ff7c4a9bb4bb94defa8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN32088884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfc24943778b9104ebab43ae9d13b58d43fdb3413b8dee5656a1cca1785d4a8. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:54Z), 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/QZHNC2044891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc933cd910a6638c808cd26d18748a80fe68cef931d9bb6845704386a018c1bd5. 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/QZTB92253236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e80f69d853fb4a10a3d64735f15143cb1d589f6ccaf5dfbc471b1786d217c7b. 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/QZTB92253237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d2236433a4192755e45e194f510cc505964a31187a2d988fa3d61cad7d8fbb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB92253238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d82be3c72283d8ca0cd5e15715832d4b607cf6163b57fc26045dcb4a9a841cf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTB92253239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f5c0756c345f3bff7596942ec323233eb4ef26e90d6aa314e9ec8cfcf67e7. 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/QZTB92253240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb209c02b4c0b6ca7e9f50a968e93f4ae09ab77481d3ac6fe7d01eba3f1fe0d79. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTB92253241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b7b5653f979318f0cb77d1353cf1c263933782bef1409a9c6deab4d392e0c6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB92253242.