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 0xe280080e6787f82db488154a0e49e92a3e14b38fc1d780a23e01ef5a0b5f572f. 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/792b8154-c71a-48ce-be14-8a61a3820f8c.json and https://artists.proofprofile.net/proofs/artist/792b8154-c71a-48ce-be14-8a61a3820f8c.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 0xbe09d5aefc54064c59b1385d6b6b38a8bf8feeda48ade8f21bd9a828600de64f. 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/TCJPY2320486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6482b3ed787c471f7a2610684dedc981c5f39ec42c32d9f70633dec76bce570d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPY2320552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffccff51cd13fc94a53399135059fbe7678ec47c91e328ce77dc03dee20b33f. 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/TCJPY2324834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1469043f6c73a494241dee1129af3612e2377b0c7a2f9ed122b447978627bd9a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:06Z), 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/TCJPY2477344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08d25d1f9bc7cd2ed6fe7064f880b6c31b0ed05794e0dccc1ed63b3e2f8f17c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPA2414063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cac88c30bfb8ade33d5dad5e9ed489011ad7dc6bc4bee090425a92de9b1ddc3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:26Z), 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/TCJPZ2492777.
Tokyo Sinks (feat. Kanamil, Kataoka Miyu & Kirara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b59ee44cec059bd8f3bbeb95d879bf532ca14f7693d44ce998a4b43c28b6f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPB2458006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403dd5e2d45896b9cf3491f717dc2597483d061ad1cbb2e48d32343b1dcabc33. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPH2567636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3eb006fd14b7725c7b3a1a486413553508acdb549f2b9e1b004d465f5fe7d0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:58:14Z), 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/QT3FC2575279.