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 0xa0e22ef8a0f1ae38745afda1de8af892be4b701fa8c8dbf430c8eb92d5df781a. 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/bc451dd2-5fcb-4240-870e-a4e2a917c2c1.json and https://artists.proofprofile.net/proofs/artist/bc451dd2-5fcb-4240-870e-a4e2a917c2c1.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 0x138d831916f261e13df37a22f43095fe10ce5e743c293137102b73082e5edfc8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ1747023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8075f3f95be895b33cc50a3081ecafcfb01b9596694afd5a7d0bf40b9fe727c8. 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/USCGJ1747041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838af64a5346eac33398839c815c0d03cac411f901b517e3820cb43df3ade16. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGJ1747061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc087a50a2a0304903b0a28b185596c9fff81d5426b133f5257680f71fc09c90. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGJ1747065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad49a7514553dd17935fbef5339e04c514349cc473a2a2c832493163bef3ee. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:36Z), 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/USCGJ1748600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ddb323f1cc07ce880db40fe687c77c7d029a16735f0b771e6940c0c74323d0. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USCGJ1767971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5affaeb9731a534e3e99b9787d9066fffe2bf8b844a8cbafe6d519f8b559dd75. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCGJ1767972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb8a589e74ce2cff83f5ac82e62ff706e911fc5c5186b7398fc4544e0b12bc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USCGJ1767975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316ed480fd9eb089f2f8ddc3ffb88b2666f86d306019a50cee0a9dc6de05ba1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ1767943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76c81013053a6f1c49f9e31fedb14c15d62ce9583481f904c332d6c5efdaa9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:11Z), 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/USCGJ1748551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e73d894d6026182c162ba9aa08cdc9f17946c3ee337e840c967298a200b34f. 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/USCGJ1748555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ad6200678aa4d624ec5938e31edc162d4be5f75719508ec66a57b2b32251fc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:50Z), 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/USCGJ1748557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37a4ec73746deed225baf9edfc3994d8efa26f703c069f761167d791e708a7b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:42Z), 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/USCGJ1748561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae0216117b148e6138939180c9acb5c9f1d420df8e290376532f3f7c528b50. 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/USCGJ1748563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183c2ce886a562881075cb1435de5ab092a14ac83247d5894720e7c60abdd6df. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ1748565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ed4831afc31ed5c07b9962d997fb7b400297f372692b16b09a80981035e80b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:11Z), 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/USCGJ1748571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b90d469895ffdc25850b1692320e52158d03c9263094623f5c0dbd42bc8e5e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ1748593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddec3bc4da37cf370f61bb47950d76cf30fecdac5cbf5fe0802ad099ff17f8bd. 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/USCGJ2011187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4253a5291b68c122883b2c6ff85e463e9293600e7aa5954e28ef31e5aaa027a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2011192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bca8c53b2f22b68133afab966b4f1e6d290559b23d8af3a9df7c4abd2c84ec3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ES6010600414.