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 0x55f8d5c00fd4eae6165ebf45d179d5982db8d68b0716068c7dc0a71613cc1bc3. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d64395b2-a366-4198-ab04-e1c905d91fe8.json and https://artists.proofprofile.net/proofs/artist/d64395b2-a366-4198-ab04-e1c905d91fe8.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 0x58aef1f773178b0441178a839149686903fddabc172ffba830d14174f58b0c9f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZES52331386.
The Lord Is My German Shepherd (Time for Walkies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640f032c4ee6f2e51d1c5fc39963ca9fc3c8e1ae7a191faf03f62db790a03b63. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NZFN02500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76c50ef785b32602da170b1969d5374273afb49c9d71be72c5edec7cb5dc637. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:47Z), 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/NZFN02500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee9d183134c81c76c49b599d3acdf2832b88ee078f2db7283b8d4e24e7cd29. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/NZFN02500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ffb06e3d1a96bff6935f55395cb826a0cdde03a438f290fb9b85dabedd3e55. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:51Z), 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/NZFN02500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4844b6b733fe43cb4b8d5296526e620adecad43195cb2fee4243940f468a2471. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:16Z), 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/NZFN02500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7b4a8bee93ffcd2729f2b1b525275c5380b7815e9cd8f63b6d7fa53eca72fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NZFN02500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ed439a2ce0d27a28282d91b0ffd4622f0fce1903b9e441317b5419767a1e7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/NZFN02500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d43a1112a869e7844375ca0b5007ede3e9c5ac3a514a8bc13fe6cfc92214622. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:38:57Z), 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/NZFN02500133.