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 0x05746d3baee53250a0024fcfb2ad0310771577d147be6476769098db838b64cf. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d483565-d8c6-4277-a3a2-92682846be8a.json and https://artists.proofprofile.net/proofs/artist/1d483565-d8c6-4277-a3a2-92682846be8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano of Memories - Jpop Piano Covers (Cover)
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 0xd69e67cd45f9b46dd36c43db5de2dd8c6a0b4d80d7992d7a6d2e2d70326d7d22. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:44:59Z), 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/TCJPD2564363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c609219b0e4993fda0c87baa9a572b2d40bb311fb3f70736b87d9d7738112. 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/TCJPD2566587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b199fd46db4970d8a1bb45edf69f27d10b78ef2375fae32d80c7359ce57aced. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCJPD2566654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316b2a3d123fb55086ff8f52dae210e98e812821bdd2979770485502fbe68dc3. 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/TCJPD2566684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb91a232f08d31adc739ce7bcfb636bfcc0063fd622956bbe3170436fbd09234. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:43Z), 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/TCJPD2566715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8547d31d32bce88551f80be09ceba6354e93b0f3bdd1f7b7256d7423746173d2. 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/TCJPD2566818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a65731e1f597d7a9b9fab8489b0b35ec5604c605ee12fa4c81121a76f600919. 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/TCJPK2580911.