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 0x288e787803f9cc4322a33b1298f8634549877064e2a7af8c6862d3c03b3fb605. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfce4975-1cc5-4291-9d29-38a73ef44ce9.json and https://artists.proofprofile.net/proofs/artist/dfce4975-1cc5-4291-9d29-38a73ef44ce9.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 0x34e92ac8ffe15120d1894fd4fbd4c96738ec05d5fdf61ca6f03dbfb1e88574a7. 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/QZJG52316108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6750e6fc677be796d35553c1aa75c777943c57b4e1e2b7cb962ecf267ed9f8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:44Z), 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/QZJG52397853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c9583948357a27b6c6149de7e59f0ac1bf2d82bff0246529c41e5d231c5e6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:53Z), 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/QZNMV2301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44925f568a16cc6a2a48d7f7c2fbdc9a87861ec778466f8a48d71affa0c21595. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNMW2357079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac2665a321c6101dd6493241e438298ab40bc397555525c8a0342dd7d0b07e. 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/QZL382420935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92f6537e91421300c16ba9e61efba31216673c4ccd0384c350b8210a679d67a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:57Z), 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/QZL382432217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3762bbe8b39a2c77a1ceda149dc4ff9a0d797460f10fb4a9b0306706a6e7d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMT2459466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1d792f70b5d714fd6743b7e2792319c965e9e614753437e5c6aae89e17d57e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA62337169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba75c1d08cfab8f8e9fb2d098acb43fb53e5c25d73389d020de90ea2d719c1ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA62337177.