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 0x984e970358e57ce78094f1791e34d9e4d39ed731fcb5d09fd3fbddd9ad787667. 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/03c926c4-4fe0-4074-b905-ee7acd3788ab.json and https://artists.proofprofile.net/proofs/artist/03c926c4-4fe0-4074-b905-ee7acd3788ab.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 0xaf0e7474bc20f77a10c61b25d6556596b8832d3c7632a4d2a5b74d047206f7eb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:05Z), 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/QZ22B3007207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108da72700b403dda5bcc5f948fc679602a042c8aa086ee8459adf25e3ddcdc2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZ22B3007209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2d86adc87057c0b4d05da45fd6c18bd382df26d0650042c90fd86e2aa7206. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ22B3007205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c610061e9509c80e89d3a50788d2076435fa864f6a9a754ea6302a7fe62aa5. 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/QZ22B3017309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dd5b41d694f20ca01493c055d5fa5eccb9caa159c3a490728c7ce4076e09a8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZN882076704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c460a3a52f4e273a4250ce79906c229b336e84c767c2ff74d88b4ecdd7d53a7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZN882303534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0273a47e88a3dfd05697449d328937a6188e0b861e7deb8fade914bdb36e459d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZN882326304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446a19cc44501313b94dd36ff29009ccf210cee675a320971c15f34127b2f696. 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/QZYFZ2480549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a37b03633b0fe3698645d846db22571f757670b1d26bec67914d25d008ee16. 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/QZWDW2505918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5e5a0bd396db044f1648d4de5120da91cf1302e9ec97045ef20b6b2af0f29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/COC012135256.