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 0xce6390a062b79e2618b253b41741d87e80beb53386177371527a86021140bbcf. 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/dd21ca60-0be7-4f73-9672-e69b09dbab65.json and https://artists.proofprofile.net/proofs/artist/dd21ca60-0be7-4f73-9672-e69b09dbab65.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 0x4c6b8754f5ffac186d26d93e687ffb7b4e0dae43326d7b2028f536a5e7b1a010. 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/QZNMY2380526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26e91b6e8a8c733ce8415c69029aca75c02c2b283e891119efd331df1687249. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:37:55Z), 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/QZL382401883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b549fb905c9b6c49aa5b918c1de155d2943c245d3a5e53caee719d37e3db1f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEV2420662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b6d6a8158760fb3bc883b3d0f03d298915271914a788a1ce92487ecf582998. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ4J2401559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689148cb5a29390c6518c59a098b8cb74486c2f5dcb276f1d68fd5df60cc8a84. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZZ4J2401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfcb7f7a8dd21d640045d9a7ec4b60f2eb4bfaec82a865217901bd2ec8cbb21. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:51Z), 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/QZZ4J2401948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa668489867f5eb59e3bfa8bcd0ae3e15b113ea4b6fed2e91517201ea4ae8f5. 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/QZZ4J2402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93979429c52c960a8e3c92b010c48388a67dcf5965b1c1fa0326162462f0e2. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ4J2402044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eb2c74d2332dde7c5c94932ea8a18a0b1fd3c10f58d188c33990de899f1557. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:25Z), 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/QZZ4J2402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71676bb2eb8cc9e026d1ae3898d6af67e5d358447b429543320a3e84d96ef2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ4J2402072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b298b6f70ffbf3782b00c00e8aa61c9b8b3d28970ee0af1391ed36b5925df5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZWFE2550695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac01495df4b38dfb6ea0defc75ff88268fa584362943ec8a9f2cf9fb4cf3ed. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFJ2558606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda1bccae13212de0749bed4d2f0265bb53e513ba15653920e229b2bf8d85ffc. 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/QZK6M2369642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645896fc85f42364ec6071b8777e8cd56642c7669bfbc75a4a44aa98a14d95ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CA5KR2389571.
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 0x1a843fe7d24d8163962eb9adef174ba109a465dd022a11bd635a9b2788f7a29a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTBC2488617.