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 0xa9f7b3779c7480a4fbb2d435f9c86abba3b3c75168aa409cb7f25b920509e249. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2058b725-fc31-4148-a9b5-3ed5f9b09262.json and https://artists.proofprofile.net/proofs/artist/2058b725-fc31-4148-a9b5-3ed5f9b09262.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 0x802ec5badc7e12b912c34343a6cf5ab897a880215c76145f572a17cdad684405. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZV8N6900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1544b7fa707b93ec2340a4679232b5b3791ac593c8b74575a9d8b23a45d05be2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZV8N6900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c304d3014d7a6b499410fddf72f579cd7d6321a4b82bd8473ae8b96e02116b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZV8N6900403.
バックグラウンドミュージック(リラックスした午後)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc509abf45a3863355938b905fa14ee43f2bab534f897c43e6d25e8f4be0d449. 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/QZV8N6900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7fa3d7a74541a92da7a1ffac13de3c530bb0738af47f2f0ea9e58983761470. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZV8N6900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036484d81b4f7126708fcefdd47e3040045811ea61965249835539576bb2b7a. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:17:41Z), 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/QZV8N6900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd988df8f1f388be66994cd516a8ddd178bcaf1b1075866eb9f2bc390749fea4e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZV8N6900409.