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 0x2d81350c90d3d40b117ebf8972c8105c01847ec55ba97f5637d1c3d660fd2ee6. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e45d7c62-3547-4add-9058-2e92247a28c2.json and https://artists.proofprofile.net/proofs/artist/e45d7c62-3547-4add-9058-2e92247a28c2.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 0x657f8ff9da34c61ceda1d861e89bc3f1dcc31ff340eb64ed2c8bd8e766a361b5. 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/BCTZI2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35645053d4ac7eb1de87dd617eaa461f77385e259f2bd3d4484addde20607a36. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/BCTZI2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e0c08a2aeffeeb774535fd764a6061da97744ea7e9528709294bf075356bc7. 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/BCTZI2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00272a2f54d83206375f3691da3beffd8f06163b1f021bd9b888c2509f5660b2. 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/BCTZI2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0ba36c76c397091b015512f0bcf07eccd6dafdee806bb58ca6d806243a8fc1. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BCTZI2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee109a959da08997373fccd74d941549d2194b214654a871359198878b08090. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BCTZI2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e5434baf43f63f2edcf83fb8b051032a57feaa6331dccbc335d8e8e2d879f6. 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/BCTZI2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a078b5f7b38d568085c56a3489888a4a20b71b67622cb9a82594cff2fb15f9c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BCTZI2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f3cbea1143c943e6d2f1f4dbfd30e62c7f2f78a5b697f2a77598c95c0d9ca. 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/BCTZI2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ecd1f2d12e4f7735a72eed129d12d924b47f0839eca42fe2584adb265a184. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:54:48Z), 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/BCTZI2300005.