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 0x18c16d7d19e188c7773f834dc24ea5d350ecefe7477a5e3055a15a16185cb7c6. 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/76c7e61a-aacb-4dfd-acda-5da88646d67d.json and https://artists.proofprofile.net/proofs/artist/76c7e61a-aacb-4dfd-acda-5da88646d67d.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 0x28e440550ff8546342c3359373aa78619e0877f905eba82be8fdefd760392c1c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEH1983919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17bf219cf28a1ccf73d9ce3add2b54a77c47693387062ed786cd3cdb2a400c2. 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/TCAEH1983925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0311bb2bf86a81153533ccc5ab3dd4abda71aea51cf3c513118c8b84e7df16e4. 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/TCAEH1983928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5978eed37d894416cab7fbd9e8e32043eb80104e7897272b448a6b451cad30c7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:16Z), 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/TCAFC2046542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a6e79327de47454e018a88c282d0d2a5066aca646451050ba4c496af168c0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAFH2054564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56079bc1305aac3fb79c2d24a0b9d47b62375775059177eedd292f8681774c68. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/TCAFN2109006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a3d992a0a004ddc5c1788e0111cc698f3d6625c8799c5e3beb4685f5dbb30. 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/TCAFP2197072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7a205971b146c6eb7669e044a06ea37b1f938bd6a147db9050d175f309a823. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:47:18Z), 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/TCAFP2125284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e0e3f2c6bd79b9e83c0d2de6dfe54daeb27737f661bd824540ecc6fdf4f06. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAFR2111685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60af537f7c4a6285decced214d8f6bc4f3b11d6aa73e7c7e80b61dfb5ae028a0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZEQU2301878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa2554d842f257796b1eb0b3bbf54bd51959b547ab4c1e27614edb95efb284. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZEQU2400074.