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 0xb68610a53f8865294bd8c14a493655fd96b8156f2f154df73312fe69c4b7caa5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c712d095-d054-459d-8a8f-894bc8d745b1.json and https://artists.proofprofile.net/proofs/artist/c712d095-d054-459d-8a8f-894bc8d745b1.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 0x74c1d18323c498e83885873407466d9d4a02ebef104f5582e9d54eaa3d73006a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFZ2282130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9df14495cfe52a8d34bacc4a35ad0b2e28aa8959a2b6896ec1f22261daa6a3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAFZ2281354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8be38588c0800f6aeadb99d4d378513c158e8534be6da7c7f14fb59973eae4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNJY2357448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7a1d6e218bdd3affd401607905c619d8c985e1ab390b19f2599d13278f9d4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:14:56Z), 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/TCAHR2332140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae41499be25d693de4b40e5f37f60459307e2acc7a2492d6ace93b76f6d58b3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:01:59Z), 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/TCAHR2332165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf19d6a4e15d0bb2231a4594cf0ea69cbaf3abc619660297bbf03b07f75adfd3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:58Z), 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/TCAHR2332296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab66b55641a6b82cc2dd040d1c7d4923b668eb47c2757cffe45027e1144508. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHR2332383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ae8717fa00a47c19b9ed2f2232a102628664fd6d014496ba629f42b2cb29a0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:07Z), 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/TCAHR2335324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11e9f4123ac421b2f676dd789bde6929b376ac9514d88627a77d671f0097601. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJA2415600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa587474374cb557bbb9e719e07adb0d157f0f75ab70b04170e08d77b01b1425b. 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/TCAJJ2517807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077e81ea69705647d25c35d0b420e6b87b49b8c05e2ee31430966ffbd0d9aafc. 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/TCAJN2535121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89fd7782bbea3d37ce358d28da76090a7bc4e1f73cac5ca177286a9fb91717. 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/TCAJS2542068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108a38f76d53ebd390eb2195a9dada9fa7f96b85a64116133e67ce266787484. 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/TCAJT2542132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ffbaa70897941a488403ce0cfb746c5901da63f571fa10be36a18eaa81a4bf. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJS2542176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf816a308c9ec902926f822273333457c3549a8c045c511159ebaeb7ef7ebf172. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJS2542491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f30cdf4efe7600ada7aa795ca27bb65883350be08f21732a174ccb7d8f0d7d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJS2542540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b0e90b2697ac9fe1012d8be329e366e5f443fd0f4e325d141ce249727f30a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAJX2556670.