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 0x72f7ba04600bb8a909a2ef5f6c7c6972d7eb86d95733ceb9738b42b4437bda2b. 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/1b9a8e54-30ab-4906-b7d5-868235524748.json and https://artists.proofprofile.net/proofs/artist/1b9a8e54-30ab-4906-b7d5-868235524748.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 0x021dae9c0dd85ae5e96d7a617d3fb8ee9ded652038a090798cc97cc349659db7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL7192100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaca3166d5fa03535681c5e2e515906d71c9f14ed26a82feae123a6b0d4588e. 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/IL7192100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f245cb0fa336b136a4e88fdb23c1094b5d8d217fb401856691924e66bd7f19c. 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/IL7192100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3776d489d1eca743906ef4021ea4e4f767f1a0c5781c09e4ab3928a2fdcd62e5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX282119845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02ca6164101ff893950449ee37331ee4ab18344c3f0646998b2e760c9c2d0c7. 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/FRX282119915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6813d87bd588c32eda4abd1c67231e52ce96d4cbb65683f415b671702528ba08. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IL1039703066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c6ec6f0aae229b25df63ea9b2f1e7b56b4132ff5990a8f19258a960df94a4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/IL1039703068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dcd8b84b50d3038bb7e8a2b71078160f2f03ff5191eb2ff06e269437423eb2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IL1039203042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb080feed1e760194e0c41e1148d78f43784635c4eb9784cae3a8d4a09eb93eb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X1692472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c5e47c113f0fb2678a63e64a30e7f42ff726163a1d2a127ebfef7de8caa7f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR96X1692473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605c80bceba5e223b4851b983caa0053c6947f79b9ac97e835dbd96fe4f0435. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/IL1039203034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6246f585ea476342113826f4326b776e66eab8c07b477e9afd782624370bb89. 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/IL1039703076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395f31228f20345e5b4caadcb33cd575341bd8e8095d363e32312eb1a4aa566. 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/IL1039703077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af3059bb9cabf790cc2d3a988d42914030939c348228d13a57b2c34b462b5c9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR96X1692474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10603aa36f0bf202e5701d5869d83dc3bd9162432f786bcfee4de5c099b18542. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL1039602832.