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 0xa16a8ef3fe3ef75cb88afa4ce818b629330955477511e42c9901bc5951acc532. 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/241ce20e-3c76-427b-928f-c25b961e6c6f.json and https://artists.proofprofile.net/proofs/artist/241ce20e-3c76-427b-928f-c25b961e6c6f.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 0xa19cefd7be8248d92c62d7c444cce8aa46a9c10208ee62e17db8d0cdf146de4d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM4TW2200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f7b050eb237fd61bb87bd8a908129a5d59330c78f3a9c0a7ca26c486a10bee. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4TW2216585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3219c2e158b82a948657a3f7c8744f0f0324534637a839861b94b276d85883. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM4TX2247669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c89d552baeabea68638fea52ada9ef55734de5383db06bd075757c293b9eb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QMDA62209631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c327bd502a41a29a2c2672ff03e43ee24c91863c27f0dfe364b7bcbaee4bfd2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QMDA62299281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01410b563645fa06a55e6decc261c588560d4f9c9705de6f999a433b516340d6. 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/QMDA72257110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ffe0ae63a8121a0f6d7dfc6e3a3a8b40dababfa07c4e4acf153c97b123336. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFMF2226559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dca754be2a5264fc20190969de0a693ba41ba844ca70511be67c677df3b421. 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/QMFME2378472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708eb7ffcc4d551d2ad79f4a2487789bf65d0f83f39fbf407c3f2e82c2bf80a8. 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/QM4TW2459042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962be0cf8890d0a54d394175b5b0d5e27283b9e840eef7fd2caf71da1b7f0f28. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM6MZ2408460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57be3aff4488278c044251d08d3f0c603fa1e911542a987e388b52dfe2af7ecf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6N22411419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a61df99bb439a1e2ca21b3f80f2fab3573af44fa530a57a25f0c0419b80afb. 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/QMDA72456985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fea5388f9720e6f558f7678e94a58a7b6349ac5a8d3bd95592a1d0274fa18d. 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/QM6P42503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb9ae1a3988310c9482862ecefb4552fee84b6fa0877da975111ceb0c738aa6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2465704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509e23abc71ebcfe82a3e5bcc6f3e75d8ac7abb0f892f703dd1c65ac3a59fa8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFMF2354340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10645f318ea21259391639c0447a7f5d5a384d0331068147192b4eee022008e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2406492.