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 0xd92401fdfaadfca3d67cb195d2acc6cc3145b4f7605efdf7a6bab46fd87ee5fb. 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/c926a64e-fe5c-4171-8a41-3b9acd0c2957.json and https://artists.proofprofile.net/proofs/artist/c926a64e-fe5c-4171-8a41-3b9acd0c2957.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 0xdcc8bbe7a905c9262277f4bcfd868bafddac344386867b34fedaef5d89fc47c2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMEV2475220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180fd7b06a1c0d36a3b532e0bc08212c25345994299bbc66a7374eb779bc9397. 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/QZNMU2495872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc46d6140850306cbb6c5eaa7efea00603b8cc8c3fe6b51514d935a3c96abf4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNMU2477716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b55035810e743c5990cce6d3222e73a9967ca20daa22fde9836daa0238b3e4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNMV2431635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf9f4e1b8a216b501b86ee5ba607a70849c43a3dfe489166a0c3361b73994d4. 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/QZNMU2481478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baf49fd8b31c20906934ffe8df7b5c6dfaf9448a590aa9a48441e15f97c3449. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNMW2403646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eddd21b5956ad3dd5d8aa69a825375f24e5ea78d63ba42fea0a2b5690fa5da. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNMW2477467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4680143caee388813bef0b41e7999e69f4c5b5cc3e90830e65d3707953d34baa. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNMY2440233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c072f6d4e12dcbd17cb14684db6f1769f79579573f784a48fcea328e21732b2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMY2472926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808145a2c63cd396c9f08a43d6c0f2fd6d135aecd18813b9601a0dab341876e. 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/QZNMZ2480053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03f3e65a0782b4f49a91a6c78328a694aa14a40956434d14a536f49ab823d84. 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/QZJG52541080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e312a7b389d961055fde0dc780f59796f5a013262d28bc441dfdf7896518460. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZJG52543577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47fabd1fc0deeb6d874f2be9b02f6e81d2185cb784c6e58b028369f1f531905. 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/CH7819577539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb29aa6dd80f68a37874d139c40dfca5804b5a0c5842b95c60a45fa1988b7403. 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/QZDA72576091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa9c75bb83192b019635e63a10b24cadc311a144d88270a2c7fa856eac039f0. 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/QZDA72576092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fe704d583dfa19038540d672374e0e0e65451d63c1462398badc24b7e7199c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA72576093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6cc8adbe69010770eb28e759881f7a6e6850d982b472fd4a57a8da86ba4515. 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/QZDA72576094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03f7d737e305bedec59ae075791dad70cbd9187b292472dacfd16e41416ab3b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZLL92560001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f42885255983a0d8c75d6b24500c60cdccd130325f9bcac2f89504f26a8b160. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZMEV2512365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9761be736a1bfc25f3833c1a43d071a0f7ce81cd61ae2ee1ba310994c6eee6. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEV2578449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce7a56d6a32340c8f88def5fd86f07d1f4d11afd924bd3f1d240a28f83eee7a. 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/QZMWW2503854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11ae94c1d77302562b3ce26fb8a502e02b0a301c0c4b4337c6c6ad2c123d17b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH7812539953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd03e8766e90d0a6806dd005207c3eabbaa4f19dc56ea190a0ad1303ce36fce. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/CH7812539983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3ae3a6365eadbc576b3aeedaeaa1bda169c4d4ba116ed8137352293ff53348. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZZ7S2525328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb2086c63925871fa4732c31f3b95b56749eff71961831f8f0d3168c4bf70c. 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/QZZ7T2569257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca36e09b7716850dcb21529e51bf82bef0939669bcce604ac159cd473c1cf7. 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/QZNMW2596247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ed6d14b9d8156a8fedef0609cfafe08ec7271cbb246a7373cfd85b71c5489a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNMW2580974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4f27f51d188595176c35820c69af755b31e4de6a776c5de46bc6197401ad39. 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/QZNMX2547413.