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 0x5a31f6ec67e81d76ac38ec504ae5fa98b3b96cf22ba95fe8e52917dcb279158e. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d28f472-3d94-4da8-a399-9e2d2860d7cd.json and https://artists.proofprofile.net/proofs/artist/5d28f472-3d94-4da8-a399-9e2d2860d7cd.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 0x192f3feded0e671dc155048ea9894a64b06b9701aaf9bb60f3c413e8d080b3e9. 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/USLZJ2368933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a383bc32b1cf2b80942b67f99a18d8860a982c46368937e85653051bcb88e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:04:15Z), 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/USLZJ2368940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fdc3e47779f7c4cb5791b920dcbf781870522e6f0ea9c1307cf11a2921042f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USLZJ2368944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75141f1fddcc13abd4c89dbdfa8d42acbbe825cfb22f6c886b3c99e4de0c0746. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:29:44Z), 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/USLZJ2368947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b7ca2542bc619a5a22e03c03849b119a7b06ba9322036badcaedf979f4332. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLZJ2368949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c5100f0e1608e2158fa1a675b9cf970a2ce2ff6690c072440cd7b6f1b846b. 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/USLZJ2368951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88b251411e469e6c4339be3c8870b1065618e4b08beecfb71f3fdd8c2fd0b57. 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/USLZJ2368953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a61dcc0c78eb13917b8215fd3adc7951330acc7b5cff06eb360280775e64615. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL9VV2401155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c263badf37873882e95226fa2ab156e47d8c556cb8b5a45e828bb2650539b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL9VV2401164.
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