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 0xebc29fab77d25f981a79a4cd29a6ea95490c88287500db17fb3abcc3763bff71. 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/f9103a48-74f2-470c-8914-b2e9d82ed2e2.json and https://artists.proofprofile.net/proofs/artist/f9103a48-74f2-470c-8914-b2e9d82ed2e2.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 0x4c768143fce0d4f64afd82bb0aea7ee312672f18f42c2b2e0cd0e008d17ea16b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:12Z), 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/JPV752003521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c268e886baf2ea3486e6807f385a60a8c0113bcd9d03b0778285f12bdf90d4. 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/JPV752003522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014a60450d248ad353b3d653d41715f867968ab09673e9a2215a1365d11b990. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:37Z), 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/JPV752003527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd24b05916420a453a7b1945902420181277cc7b4f93b3337bbb4e590528a2d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPV752003524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c768143fce0d4f64afd82bb0aea7ee312672f18f42c2b2e0cd0e008d17ea16b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:50Z), 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/JPV752003521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04077c083a6e484ab80273edda41d7d33b60c224462dd7a939f590e62dbbf6. 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/JPV752003525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44f5a966f7b1bab8fd5558cb556b8fed56c9fde1df990c4ffcda6d9940983f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCJPY2314550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778abadaeeb9ef30a7cc47d4aa24a69c69126face21586e9c58232170436eb86. 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/TCJPC2414742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc429a4d914acb40755a5776e56b3c7c02cfe5d32946cb7424e1f611fc96e7344. 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/TCJPC2414838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880f5fb37e422e418a6440261829b51fa25152d302817bf859a477869e6f0971. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPC2414859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c87324adb810e4ba3a02fd0424bcdf1aeeaafd690c7e35bdd8bb7497c2d4f2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPC2449630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d903f4ec897ae079fe24a3d68931be9492100342f95608c6394b809ac520f90. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:02Z), 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/TCJPC2414808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427fec5d62d6212d98138c7e54732ddec93421240bf1e1043ebbef7897dabd8f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPC2467754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a551b7502873d2eaf96f9406a984bf34713251484a13e7bacbe99eb43108789. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPC2467765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b350c0c9a100a8c5d201fa718236c027ad84bc4139461611291935eb6222495. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:32Z), 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/TCJPG2585987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ff8f26ed900b943aa00cddfe8f44c6cbbe543d4e6a4cc0626c77b25dfdb5a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPG2586091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc31baa3e7a8f898446b6ab38479ddc8c0d1439bac2bdd8bf56944902b1574a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:57Z), 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/TCJPL2564148.