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 0xd9dc1b54b1dd2568c923279160c6cbd5cb1e27e87bf514dfe70426d5cf1add1b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e012732-2297-4b6f-8b4b-3d8b60201993.json and https://artists.proofprofile.net/proofs/artist/9e012732-2297-4b6f-8b4b-3d8b60201993.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 0xe28f6c02441be0c9ec08bb3664f7c92b440f03aeec210f9ccbb531d5ae0632db. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZN82480532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e5a27ff268c6794c0ca992e47944b2718e213aac9e810b5b53464b8b366469. 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/DEZN82480487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758a92c160011cc1af206ddf78ae23bc1312d1a61034d9640f3775090a32e3c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82480486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c34579c58b793e1b280d3ad4a9c6cbc8030649da0ec45e4f09cf713b30aed. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEZN82480528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb504543de373eb2de249cacddd5e72633076cfedda94890814b1e21f857590b8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEZN82480533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf321d247b8586d6c82e40f6e78f69761ad058dd01285821fd3bc910a72838008. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEZN82480501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383256848a6540b37c4c6b747cd7c59939d64c2d3aab2497664eb9fcf42a95d5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEZN82480481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a0deaf20da6f0bd0394f1da83a78b52ead06a08072e44a1259aac7e57c84f0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEZN82480531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439156c39b413f4a3133aa847fa114de2359c3b3895c22592a69499a17d6ab65. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82480530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceeac6aaf02fe01cbf1001bd4a0abfec2182aef1a181d4a49fb0d4c41845810. 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/DEZN82480479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23812a104a29f774d3c6667f5920eeeb0da24a16dc3a7528bb3c278333c85598. 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/DEZN82480496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ef02a710307d71944d3f7b8e207ca8e43712cbd2f3d00e9c9a031bb9f182d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82480475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530b7b0492c08f69c8b4929ec8bc60df1f5a9ac51142999224e54070d645ebac. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DEZN82480484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a8d68822c095ca63ce9b38c3c25fb1db66afad8cd50b04d82a040b4e99207. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZN82480482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08dacb607936990f2016a2619ea3b0e8c9f92192eaf2afd19276d0bad78e4c6. 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/DEZN82480493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95b41562cdb5373fe7f8fc55eaf2223e4f2b4c9329cd4d7ce40613bdfd2554. 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/DEZN82480491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84edf928eff9293619ee9deeb413defbc3bf710f6a9d964b36e19889bbe9e3cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZN82480480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a34e5b9ebb64a14061df221ef66e97f71c34bc73127eb497835b1402176cf1. 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/DEZN82480473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376203768f8661205ced543e8a2d0ea526f10f4f1d6ec9953f3496ef097b19b6. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82480483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851a82b754ff4e5769efa705034ae482c4e1e32e71edee133a5137e6273748b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZN82480490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7f0c10e2b1e5f2093230063f8df2de541f69dabccc3e2bb960005a6ca69182. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZN82480529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7c0594d4587c3485e2795cfcc97ba8f649cb5791c5c836ef48c6d71360812c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEZN82480488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28435e0c26b6a40e99747dee0dd3b9268ca796d9cb41aa40af42ba786a465ea. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZN82480492.