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 0x64f363abc2e7ab56f88bb08044dfe66747551244e528537f53b139dadad6d43c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aad7fde2-5a1b-45cc-9d24-5a0e7458b914.json and https://artists.proofprofile.net/proofs/artist/aad7fde2-5a1b-45cc-9d24-5a0e7458b914.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 0x94cb351334ec0dd1e132576f1cb2dbf7d2d5c75092add17b83014052d5e19fab. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWR2537611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fd4f03f2bb17c7507f53f7038938dfa52d7e39fdca09678ba4e3728696c071. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:10Z), 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/QZNWR2546592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3b8cbcaa26c629b8608527f3a08f489deaa3b1238264984d54edcb06aa02b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:12Z), 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/QZNWR2562134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031693dd2690f8cc72efc8fb73ba06d84735baffb51e53e2bfc044b79501ab98. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2596393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb2b6da817b6f1fffea0c34c13ab1788692c94788463d3dad3a8496059f620. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:23Z), 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/QZNWR2559798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518d34d40b33a6521b6dd2059a54a2a9912115d0249b57f57afa5cc086910f9. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWS2576161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f6637410fd72c59dff3d2553310fe6921874e726aaa9b2c575305daf16ed1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWT2507019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5cd04bd83f7fec55b884176d4e783aaea27487f28ac8370668ca40e44f4932. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWT2572227.