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 0xb50a4b6181922dbbf2c49846090cd4ecc2eae5e10aa35a75832c09dde5085146. 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/721dcee1-f052-4ba4-8356-94abeb6f17e3.json and https://artists.proofprofile.net/proofs/artist/721dcee1-f052-4ba4-8356-94abeb6f17e3.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 0xd5e43f10885e7769f0ed53b2324ace5fcdf56be0830faef3f5eb967bd1dc89c1. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/SE4RG1708501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592283d1e3a8763ecf02f43ddd02dfb899e5fcf541b733ae6d16fac828be726. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/SE4RG1708503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af24567b6019525d19c8083589229b4f87a6356614c62abc93a7f2516a46e7. 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/SE4RG1807702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7065c09adbcaa11b20ac7974ce2a6e70d2f7e6f75f8eb132a670ae068166ccab. 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/SE4RG1807704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4f2a8264b6f50e9454b1a4495e0b0aff5cc92b569d4b3587758616f94e024. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE4RG1810201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1b03410d3d4a7fbae2587c97c966aee20df5cdd30f4ee9cc840a8a9922ea28. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:19Z), 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/SE4RG1810202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c66ff646162225d9397144b6fae698b25980388c76435340cf71dfbf1c0b6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE4RG1821203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a56a17d41c25bb21bb49624342f18dd052188f542e720dbfd2508d9df6909f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:40:46Z), 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/SE4RG2003202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014131986bf2fee557e27d0baf5cd79767e388d6c214365ead189b306379088. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE4RG2077401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08669b58364003b906f7dfb3699071a22c53432f413289ceb790553bf96f9d2. 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/SE6RB2017403.