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 0x0270953e632e950c6dafa200ffa79be5d77299d20b6aaabe3856edd4c3eee93b. 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/c7ccae56-4399-4b7c-ab1a-a38f1ccc3c49.json and https://artists.proofprofile.net/proofs/artist/c7ccae56-4399-4b7c-ab1a-a38f1ccc3c49.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 0x730037c2e3a7bacf88c03d4048ec7a4a48d507265c04997fdbae7e928f7e111c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNMV2062982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3700410724e756d60b3d82d7df758862cff5306e363be4761c43488e46d2272e. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZNMV2063017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe19a5b649b814cbb4ca16da5b1e1d19bc11dada4bf351a59ffaae4438402ff4. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZNN22115170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7820bfd5d909b0b834fd18841b3bab285596bc2e19fbe45f76c661eba31e8001. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:30:47Z), 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/QZNMT2108979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db3dbce408e260744a131f01943ef21e59371b2d64818b7b81426febdfa8bdf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZMWW2102183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45fa981bb2a6542dab92cdb7012f4eb542439285751380e8f8fd68f2405f4a2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNMX2393114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3503717e178cfa05c16456844c48dcb47c2599c00f2d7a96260cae2b85afbd5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNMV2461755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f2199d9d86b34dda64ae0700b8a3429e06ff66724f477faf3e51b7e667dd2. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:11Z), 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/QZNMW2550936.