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 0x18d2715ca87951f378d158cd4198d2b6c1aef84f4e56a7ecf5c88f2945c224c7. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e92e0b04-1124-4a90-9732-10a105a17fee.json and https://artists.proofprofile.net/proofs/artist/e92e0b04-1124-4a90-9732-10a105a17fee.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 0x8304e4996d588ca1640160d3cb631484453b170a3cbeb7afe0d48ce37d85b3c7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SE6EP1900701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67bd76da3b7ab5167d3d40059f2ad4834106d9bd86501ec61b65fb2a37c2cf5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6EP1900702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac35df26b758f9b36b4997ad19b99ce3f89af5f1986a725e5b56acbff6c6d00. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:26:16Z), 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/SE6EP1900703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd55c4b1851125c2a2732870a8efc7ab24ebaa3b0dee632481e09f1e1059b76b. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/SE6EP1900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22cbe7c5ea386e0b38b59f94f10f822eaa56a804def42dff61a8c4a82ba787. 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/SE6EP1900705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0582d5b16c250aba4e1f572f7690c25b40941ac2187de0f7933df286d6a08548. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/SE6EP2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890b94d8134fe601d85539a2a0b6fd6152ef8f9beb5d80fff4274728d3df47a. 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/SE6EP2200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b001f55e9872355f7144ecf9ebaea3c9ed48b0d200606b3cb33f4b91c27974. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE6EP2302001.