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 0x48f717b30b1ab3b9b2f9eab8675de1a1e493f485e47e95024e6e89a2c0ed02fc. 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/9b69b326-709a-4f85-8c51-bf7ec4fadd1f.json and https://artists.proofprofile.net/proofs/artist/9b69b326-709a-4f85-8c51-bf7ec4fadd1f.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 0xf0f0b823ef3bee34e48fdefaa70b8b3492b09aa3a63a50515036292752dde67b. 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/INS181900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff793c8ea85c9bf45164c9f5ac991a0768b37657a09cf9201302e85148aa091. 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/INS182000897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ceac9a2f5848ddc2505fe5eafd386c7b50d904322d0df0bc7614efe6d21b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX202009250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c793aca4d54a8d031ab640cc639f1131acb807b2a397985d371950dfc21b8. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/FRX202090235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7997000fbdc70543a9dac2bf5e1840eea66d59f4a4a01f2c150a10acc9c29a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FRX202105746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f01c636189795b2ecf3a8ffefa3ab601cda1e23c5240b32815fbb9e218807f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR10S2239898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d83ea8220060f56c1d464a9a4017a923201776ebdbbc330ffbfd0388e7403. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FR10S2239900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabcb70bb5c2b60e807a5c1c27e1976c7a6ed79eac0115176fbaad73364d667. 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/INS182300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2080694b254a02cbf6cd0d635a6e59d14f0335768441fbbceeddc6b71bfe2461. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/INC622301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5aed60644753549492ec6f00783f8885d64a480a49147443a8ae821c53a9b6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DGA0Q2332292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbe8c5b08d0262837bab2d3c3374eba09d14927aa0841f80e7994e02649fdd. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FR2X42453308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf1cddfb0dffe61a35d85f33b7d0ed050bc87a9209f62994cc8fec9310942b4. 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/INB942401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c1d7c32c1773413374870727273ed96bfc9cd9fe29dd11128725952275450e. 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/DGA082406383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7085c730f2c4c29f6ec5023a9088a0f4f9a31d1188bc51eb8167331c6c9ba. 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/FR2X42503354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be59cb598130b848f230bdf299ad1c650bda996a4097ff58ec18f3da5654290. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXH2J2519294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3609c3b8675e55c64fa784b8248b9d1c02dff6a1776db38cd8697d5c68c71e9. 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/DGA052561915.