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 0x730fdea316c886276532ceafa894d7757190624b409ec35fda3cab00f3e0216d. 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/9d2172f2-1122-4595-8d98-680a79e8635d.json and https://artists.proofprofile.net/proofs/artist/9d2172f2-1122-4595-8d98-680a79e8635d.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 0x1f29a60ec8be9ad78cefc45062bb5ffd9512a977a28735e3fc2862d65a69643b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:51Z), 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/NO0LI1802030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8debbc5ad739ddb36b5e4b93dcc7034e07fb95e7894ae2320b288bf178ae97. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/NO0LI1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ed9814fa3ee0988b0f36a6f0887b1ee6d45bb6b18dea301a454d444571238. 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/NO0LI2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a06843935e5eafb35988c5f63a9927e79a232ffaca15b601845d65ddac769ad. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NO0LI2201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aa100abe94dc2c8fee527f6c1e745fbd7c032609f6e5244b00195eae66a598. 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/QM6P42379408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780710e203618b0207f350ebdaddbaf411d36d553b616476a2abb213ee6d9c1a. 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/QM6P42411474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d91c97b7e760b93d5507a275abf191fbca25d29b1cda582dddd1b002e03b0e8. 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/QM6P42411466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f271fea48c1b7c83e484bf49a313957ac0e1179ca8e387b007faa991ba3e8e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7282572774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f271fea48c1b7c83e484bf49a313957ac0e1179ca8e387b007faa991ba3e8e. 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/QM7282572774.