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 0x0306d9891ae078e0f20a2796edf2cf0edbac6c6057ea7b795351698247ae70eb. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccf1ada1-bfa6-49cd-ba8d-b75204b3c1f0.json and https://artists.proofprofile.net/proofs/artist/ccf1ada1-bfa6-49cd-ba8d-b75204b3c1f0.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 0x3b9a4c7c3ac706b9b55d31a6d21098d50ff932c1390c8a007b091818b8fbf4ca. 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/USCGH0871184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd199c67b24c0a76349789893f158cdbcd89baa59acce2a2d822d52193a80836b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH0871186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a6cf96c49d5bbedd2cc1412515b278a98306f9417f288a50d9dae12ae69ee. 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/USCGH0871187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9142c596f5dfc370d42e0c4a9debbda9b5f167ebe86f28525fb60389ee5bf5. 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/USCGH0871188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3175cb12e170c438a9aec51d558f59cb2e13ddaf5c57f0a5e789f33e6f4a2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH0871190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03692bb0fa941673fcb1671bac3c95bf956e16d288327c95c9a6cdb7c69422ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH0871195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0aea36cbe7d60b660119452d3292a4505fe74f8934915138930bf6a3cfb5b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:13Z), 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/USCGH0871185.
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 0x2a75b5375a9e48ab11115dbf1ad582e239489df68f847f6ade7d689ad6d300c0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:41Z), 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/USCGH0871189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba4904c8ee9e88ded769c158228a6b197860b7d49de8ba299e21df68fcb9610. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH0871191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a792d672340b1fbfc168d7087d1f2edbd641dda4e9db51b1e981888b4ec2f5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USCGH0871192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12130a1bb1afa0512daa6c98496607a106da74fc69eb12e7e12a6598871161e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGH0871193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e960331a5d4f7ea3877aa6a2abc9b459b9229a644d7fa9fc648e51d529cb0a4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USCGH0871194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a7b51c2b3517b75384571b0703428bbc37b5d0251789fd5deb9386f5db130d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM90588619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab46d930b9b46d4e48dd5200529091602c1311c9c555d674d4fe4f7e079b37f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM90588620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8bd308bbf9f43a55a75967bcdd557c80f8fb115533d5d7a60892443a4fcc72. 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/USHM90588622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62e893895c15a2b24a62a7f9fca94684c5f6ab3d8e184675ae3833ce6b8bf0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USHM90588623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324417a30f2b70558ed2ce964c499590faa2a1953bc6eeead1cd41ec04300fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM90588626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477203bee1b2542f3f74c3d3ec21a566cfaea560eefe3dca74efbbbf18e6803. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM90588629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d82e555d3c0f1c8b3462267eee55f76dcbaa6579c8737e6dcd53dc2788d9cd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:37Z), 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/USHM90588621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e7da692ee9afa20d6ea71d9c48a90f564fd351f367210888727791cf828bc. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USHM90588624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf33811dc126b1d60d05f676bffc3687dbdb0d8cdc44270814c24b12aca9d959. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM90588625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3856862d6280051834214f8b51913588da55eeefba5e14b649d2a9cf4cbf85. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM90588627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597bafc7bb1ae3f2f249ef353209e1ba99d3ac4898b1ff357fa531744ef7058a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM90588628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a665c884937063e8514e2b74528f68b1845792e3c99f229f281c262d59878. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:23:31Z), 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/USI4R1132911.