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 0xb2ff8e326282ff9806113ef5fa7509f01bf841ae5f4dd14b065f983830738544. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df153ac-4d20-4860-a59e-f1b79f19458e.json and https://artists.proofprofile.net/proofs/artist/4df153ac-4d20-4860-a59e-f1b79f19458e.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 0x4268d40995c96a44475da7e476d2e724d1f25e889be0dd6fc9d1d87343730736. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:48Z), 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/TCJPE2587975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec553f24971fe198a001e14c39d1debb4f849c6d6959be0e5f19a4d0e3fac3d6. 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/TCJPG2592253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2359149eb42181bd75cab0d6d18452778560286b498c49fb00f19abebf3ae737. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPH2518908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88027de13ec4eccda79c3da3d85f2ab212e7cb33550bb24d655ebb8f9ae4063e. 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/TCJPI2572245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f41f9985041219887dc0b2cb9044140c8d5f92fd563c46ee151c8639d8a3a. 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/TCJPF2587608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3f3ab6521e5ee2a556e914ace63497193e115cb811c1bf337f6bb9b5fd4279. 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/TCJPJ2546970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b520bc99ad27c49d1085915695de2051f5a061db8f2755d278b4c28382f7f2a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:43Z), 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/QT66J2509144.