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 0x3f420028cdd9c9ebfb506d922431d2162876107c37e5ab54242b62e9abf12c07. 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/b6581a44-2800-4d62-b10d-a91946303a6f.json and https://artists.proofprofile.net/proofs/artist/b6581a44-2800-4d62-b10d-a91946303a6f.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 0x7c6e625cd3ab35bc0f5dd466ba55414b2587328af2e2136ffc63a79e167b45c6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:31Z), 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/USETB1200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b600b04fcfa1a33c851c719d6775d25fff2ee1901b3d1bf50269ee1f034039. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USETB1200844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5045c974fec67f1b48487becae27a29478f1e62100dca284768f775e2c7e45fb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USETB1200846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad556912b669578cb3b7c45f93885520078dcc377142e86773c30b35a2571d4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USETB1400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfc267f2889c57aa288c8b14a489de81b9c77e5f08f86f07c6b49e00d662547. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USETB1400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ee4067c575fe42974d69033f6cd25a5f63ca1e3acd4d0976b77cbc1bcf46e. 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/USETB1400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2befdaac4de08769a97fe820af884fa75cc614e7d6ac033fe6511f6a2b19e4ce. 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/USETB1600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35373528ed192829dd3ea63db537e517fccd2226a4f23c24f789e9afd1c157c8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USETB1600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b80d8dd80183273d4ace6502b6d685824970cd4d96d6a2883de917a09ee404. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USETB1600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8f7282fc2c8fd5527b9b4145426fd715cd1d674e58e971dc812a0859b1a17c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USETB1700491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e6f08a84718694256862d3a2745dfece92ec6d872825bb3cc52321944a2d00. 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/USETB1700493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a4da9cb7061ab4e169c99e700fa675fc683a851ffc3eb5d9c656b286aa681. 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/USETB1700496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a2534e53e3092c5980a4e12d07f02394c41e5477b22365d7cd782fb689e362. 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/USETB1900199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186c03fe1800092cbff3e992acff891bcd7db1b9d8ade7512005002b9daf5f10. 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/USETB1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9091bf538f2b0d092e2c8c7af63267e3400ac8637c31db7cfbccaf771d216b. 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/USETB2000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd753318b9de4dbcc7055d3c2cf47126e75a370fff0569eab5ae203cf563f9be. 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/USETB2100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494694143bab9db897c8f7292d2e62d9753dd55dbf465cb31e086c1e6005f7a7. 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/USETB2100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018b10c10df1747ca086675bf99f0614250a500e252f7b86d816bd3d8f7620c3. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USETB2100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64a32cb783a1bb879043911d7b64cb5e4d0604fd518868060a8f436e9ccf3e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USETB2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189d2025d8459f316f1299320db2c65e4ad389d10d0daa231ab52d29409d0944. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USETB2300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6eb91ee4b772cfbfc2ced3da65b9b1ddc343eba6adb9d0c99f63a022d56cb1. 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/USETB2300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705791d3bbccdaf14bdac7868cdb14e330a0c4fdfd13916bc03cd5de267b96af. 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/USETB2300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b0e51fd2bf1bbbf27fffd963750492f1df609beb7b41f9123a26fd1e498e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USETB2300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701fd6d6fb0b1129993ea378c93304cc73d7d34745e13d594ca57d3acd74ada. 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/USETB2300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb07cd4d5824f6ece11d02c86ca5c754f0816cace80d807ba734e1b13d06226. 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/USETB2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49f40a9ae6a3bd537918e9777c862b6f453f01293f174707c7df853a6e80c2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USETB2300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ad80ee7f4d8d84b177eafaffb73a02c8a68e6a13f9021b7c42e2242ee51159. 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/USETB2300333.