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 0x686252e86013f16e327b2d3b6d117cc7dce69c18fd6f7dfdcc254b7802f96944. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f31a9f1-e87d-4197-9d05-07c8260df91b.json and https://artists.proofprofile.net/proofs/artist/3f31a9f1-e87d-4197-9d05-07c8260df91b.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 0x0cef53760c542d28562e33d66e38d9e6b56d5ba176286871baf270080a120616. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/INV862410526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6255a6d23128b143a61779cbdaecfeab7cd6068ed36deb2f4cb3893632a9c62. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:50Z), 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/INV862410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760cd58f69c7899a1c2fefd8c9186b9f67294adb5f4f3e93bde095d3b8a0cff8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INV862410525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bf857369ce181ec854bb7a4c7706c5f1f98769dd3a4b5a5b75c5f14fca78bb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/INV862412225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bf857369ce181ec854bb7a4c7706c5f1f98769dd3a4b5a5b75c5f14fca78bb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/INV862412225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad57ce6dbc561c0ea1517fa7bddba87fdc9d43db145b2391ef4e8d96ab00011e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INK602515217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b24003d958d25a13a2b04508a7d2af49d04730325bc82d84f177b48ebca623. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:43:50Z), 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/INK602515218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54f322f600d58b7b2f8eda43523e106d2736333f688ae61a8af3c856ab2447. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/INK602515219.