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 0x77881a02556d5bc50c32377d4997fef7e449d91411788307dabbc6921c8cb319. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68967c3a-bba7-428a-a137-cdae0fa88fcb.json and https://artists.proofprofile.net/proofs/artist/68967c3a-bba7-428a-a137-cdae0fa88fcb.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 0x6548992f7a648e823d3f73bbc11fa66301d6db28939f5ded15e0f9751a89a2fd. 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/TCADG1799313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d53ed31833d5c946ae27bce5d337cfa427658c1211c118e477710ae0a5042d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEB1937505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4322306539bd67748dd2834df8575ef4962d605beabdb860388d32ac9ae4cd8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEF1912388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95037f37647909a8e3739370c1856ec183c2b79a8efae295038742dcaead2d0d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:10Z), 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/QZ5FN2172792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7dc35ff6ca0a03010332c30f4d66c004f5028868f4fafbb7f42a209966a506. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBRKQ2138247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f72fada141609d46d754945f7b99877d6723a3cb8c57fa909f8a47748387b85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBWUL2155543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf94c4f4edfb98f602effb956e9ce928d45287bc626aa98b403b1a3796efb9d9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:09Z), 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/QZZEB2389832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf286305c40eeba10ec0e4a19049c30ea20b826c122698b1871a81d3aee1d399. 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/QZWV32483234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aa7450c64b386ba71e5d13da284adc9faf8f9b2fed475bc5aedfbd5f4edeea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWV32483238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2bea15a9c599c088c71f046e56cbb679d0a87795e34a8608f41c08d886cf3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWDD2581512.