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 0x7a55a4b6f48e9727785fa0129371421f3b33f5d6307edebcdcfe7f7369f59f3b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ddc1fb0-42ac-4abe-b057-9922c2f9d4b1.json and https://artists.proofprofile.net/proofs/artist/6ddc1fb0-42ac-4abe-b057-9922c2f9d4b1.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 0x15f3124ab677ab6a7084320a7a6b8ed92fbfbdd36054c35ec362b601a634b4fd. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNWS2482900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598b81c1efb5b2b18fef70afb9f9538b5f0e52f049f4d4e35adf801bc3606c3e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:04Z), 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/QZNWS2482901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7a79440ea91ff61f996504d36453e71abb81650661172a8e4020420bdc1208. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWS2482903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c8a7c15063ebfb967eae517c3c2b1e44e58761e8677ceaf22ae53257ce41c8. 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/QZNWS2482904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8302c6ce599f464fdadd71725326afa5e28e92e0ddbd624a6626ab57470445. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2482905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814ae16f9ef434480d99d1b4a86a393a3f77ecd6707c963bc067337ada1c498. 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/QZNWT2453661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f834bda6ef731e706bfc250a065a3462d42d12dff283bb22b73cb1ec51380. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2453662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05289914c3e4175eb3b564ebef99d5c2429fdd203d2c3473d7c39360459adad. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWS2482906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2446ff64907dd9782c1e51c1c71296a15eef2287a14fabcbe08565c14532b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2453663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff98686c0dd0e15b598c75a611f9718dcc73f244a3abdf7ce0e735bd64c6507f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2453665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b32e9d3c8a2a9c41ba0f8619cb68413afabfee7ae605b714c229b75c2bc0c48. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2453666.