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 0x790803bc53c134a40cef4bafae7eceb9d695fa8371805fcb89bd94efdfbe3c40. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbcacefe-23ee-403d-bdb0-a2f06d94b520.json and https://artists.proofprofile.net/proofs/artist/cbcacefe-23ee-403d-bdb0-a2f06d94b520.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 0xbe54a48a987553a4fbbd34924431d7434af77b0056a20a9218efc9964383c9d2. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DEQ022007109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb6f54d835b8888299a630aa97a62a8516fb179dc360c6828f1c60a6a81b33. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:14Z), 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/DEQ022003881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08082fdd8461f4ee5624eaa98f67bc000bbfc8e25fcbf5f0bc814238edaf5a24. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:27Z), 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/CH4132200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07edcf6eb58a73cd5fb9ad1da5fce3d04a9362cb07cdba8592de01b96fd0191f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH4132200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd92c93e3ace7cd65c7c6fca97f0c3be83a33a47f709b4fe0be724e2f3535b4. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:42:29Z), 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/CH4132200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6425d0ed91d16005d022e5209c513a6b97fc4b87cb459407231d43391b8f4c64. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH4132200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a09154ee48d3702c2c86988802f1fc5456c2283aee0cc7f9ee2b368944afed. 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/CH4132300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a9351d1dbd53680746a476f1196b7beea80979c929a61f8173799b7fd179a. 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/CH4132400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14962cd1f92a81699b1cab8b480f3d772a260a2f2a4673f35435cc4f01c0c34. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CH4132400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80684a6b0785cfb88b01d7138fe78be87dbe71460e0ca6e300a0042471944cdc. 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/CH4132400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a9351d1dbd53680746a476f1196b7beea80979c929a61f8173799b7fd179a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH4132400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc77c02e318c5ef616da4cd53fbcd87ffa4daebe71e87e8fdfdcf77a6f6039. 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/CH4061901708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5303bd171d724760ac580b59e6f8f3fe1145cab00da3c59328f0cd0b99681. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAN112300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f49c03bb6d6ccbb823bef888a51d304df6ea4706990972c7cfc1e4fcdd3945. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX282488031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc77c02e318c5ef616da4cd53fbcd87ffa4daebe71e87e8fdfdcf77a6f6039. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH4061901708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82025479b429f594259f2c5d292a41a96babbf5ee95d02a1bf55da14ff06580e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEUE12427650.
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 0x1e11f97f8f626b98c77f09a929d435a9be401bc779d2cc4989bdce544cd30241. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEZC62356552.