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 0x4832a9f552ed546043ed3d0319738a2409c6f484c10d6d50eda16082e4a4ef4e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a59b6138-6239-4f63-94a7-8cbe0569ca27.json and https://artists.proofprofile.net/proofs/artist/a59b6138-6239-4f63-94a7-8cbe0569ca27.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 0x7c1d678291f27835077aa3ed46a08d0ae64f03970590138cf5b2fce02b7fd30d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CA5KR2160651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f434d4425f140f9ea30b28cc2c252560fb08db9846da1e265f4d266c5406f92. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:16Z), 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/CA5KR2160654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa3996dc0d5fc402493aa7886537e6246603312b982f69eaff595d5ee59e37. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2160656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb730605e7feb1d45ab1257c03c200f07716c2a1c285193b6c4181b07472aa1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:13Z), 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/CA5KR2160657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb60a937447583e8ce8e4f420ebd72ba6fa399e94a863e46a7384d07924ececd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2160658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a957baac99eb05e77eb8aa84391106e9ee29ab5f4614d3f489e2c1f04b1ed1a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:11Z), 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/CA5KR2160659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345800a667234872433d057cae7099d3d41b2b06ce6a6fd29a0b6ac855ce20eb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2160660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3960ac58d498734a5318eaba3cbda7acf9c220b9839d56b438b9674ade830. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:20Z), 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/CA5KR2160663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b0a5d6d960e71537a247a3a15118e4f046188d1d01b0ddf1bfda3e48823f2. 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/CA5KR2160664.