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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e580152e74682fb3b01c0e2ea0721173900c8ae058f7915bebcb4ab22ecb06a. 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/76db42ee-a1e7-42e0-a2d7-7e816cbe5c1d.json and https://artists.proofprofile.net/proofs/artist/76db42ee-a1e7-42e0-a2d7-7e816cbe5c1d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dcb78a082928e326e4ac49ac26e40b9769ebecb5403eb78b7d643d5f7e9c77. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJV2037336.
Round 1 (Vs OttO) [prod. by JE$! & BEAT$]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b83f30b0d7801a07c0e46a4cc42eea70982c0f81d6f5ff3a94bca3a5d4036. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/RUA1D2262643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207827b335a5df1b10eed58ba9e9e56f798f7a7aeae1d536fa7ccac76522d647. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2262647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada7817c83faba43357af04eafcbda2e1716c289031d694700fcae2528205d0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX872271078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018379dab068309ca85faeae6996c351d95ab4d816e7016d7baf04938fcf660. 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/FRX762333794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab0b8704c98a7c6b7b4281cf863e644d2effb749d3c3b72d416f9d1bef43f80. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX762333796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d94f7a0c5dd19692714c58f17ae138ee5ba56b55dc196d599af6a371bb326. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRX762333797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65912593d0163102902ed9bbec6ba3d2c6b0f8e853e749229704c4b929df4842. 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/RUAGT2309045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f96748dac6d2c6fa7d22a57c261e0aba80fcc0b74be3973bbb5f107220d7ee1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA0L2371246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d67e50e8b046902bc08325d0bffb37c88e93b6e488f1f7e654591a43c4fb610. 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/DGA0Q2368859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf068c7e86a5018515a0e03e6fba546ad5b04d4631eb484766275068a700623. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/AEA2Z2429355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1e5c2239d4a6cfde8f23bbbd0877ea3156291d089b0ef8f7c6382f2de94ef8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/RUA6Y2501555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ce20193a5e77fe84d2521931e4687cf809e9ebe8a754350ffb4802130bca1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUA6Y2530060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54094e9e63e0b52734586ecd82d22565701d4c3b5aab5c90b97e2ed92c2181. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA6Y2530061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f4e4883cfd8f87f32123771e822bf62a6289b85a366dc4e0cac3924d412c2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/RUA1D2264672.