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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab29f50fa2d4b8a81c28e0a7c18602bdcd54b2d498cc59ff39c2661921cc113c. 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/c6016ab4-a667-4b67-9ae5-452183d878ed.json and https://artists.proofprofile.net/proofs/artist/c6016ab4-a667-4b67-9ae5-452183d878ed.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0cc0309ac296c96f1917d2f2e5a51b6c2250b094ea57bfbd729aa4f889709. 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/US3DF2289859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e293dbce08ca508d4d04ff14c07316af5ddc89b2594021df15cc2071c23ec. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USANG2202045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b50e45c1fdcb9d24080337a45ddaada5dfb356e6f4e98012dcfe16e06c15e7. 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/QZMEN2352135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c31eecd99b8865ffff9a2380248fe4f23c54ccb39b193b36705ac141743753. 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/QZNWQ2379070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5298c2047afc60a66a46d58db0079828ef77548bfff846a3bd73cd6e46feca. 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/AUGBT2340762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80a58d0590b3bbf8948005a01a436862969f2b4baed9f885ac2205aa5039c8. 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/QZTB52374373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a251415878dd0a892c880a47f6572863e4a41b6dd583c4266df503f724c3bb5. 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/QZTB52374700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f30cbfa7d3088ba6857ec240469efcb316c4a25bf068f58c7989b7fd9079ed. 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/UKZGC2401620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae0356d901d4e2e344bf6c0a3fd9a94878db3d571c82e6b263110dad82a7d0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US3DF2407174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7316b875ac198206982fa2cf24a07ef8ec30d1c2e1f724ba1c96132f2e4cd642. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFE2405092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ed53c28325f4e321b44e78770f4cb91f93e2ca476da85d6a6c1455f5110bdc. 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/QZWFE2407595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8927cc57a09e58d7852398df2305229aa45c833dcfbbf6988817ed68bd2ae. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFE2407596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c285e4e3da99d53c607b327b530d71ce626fb19e9cb022ae9ed8b70f71d710a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZZ7R2461543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e7d20be68b5682a4dbc3dad251e74dd034ba4a75d6f3b61791c3d36a4acdef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM3DF2280066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfab8788c42772fb1c0e631e94e8854648cd80128bf8f88c9f7a5e0b6148e2b3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPJ32343576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfab8788c42772fb1c0e631e94e8854648cd80128bf8f88c9f7a5e0b6148e2b3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZPJ32343576.