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 0xcb9edd2979d808a0ffef3faac2e1439f00205b48927b76133b885cc925cbc9af. 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/42489ea0-2956-4a83-9aef-3145e98dde58.json and https://artists.proofprofile.net/proofs/artist/42489ea0-2956-4a83-9aef-3145e98dde58.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 0x148336696391e949dc272b0fbc8ed8300fe6a4fa32daef053ea50eb5f3a85fe4. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZMEV2182246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cddadfe27f0fc2c7bce3ceeb19c6fe60450beaccfdfe00845498a1f31af249. 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/QZMEV2181723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a6a8e7b751cf436ba59a2acc40ca0b7e10cc92648a269e72a5231c7204300. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:09:23Z), 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/QZMEV2187091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc1487347ca6b4929854b596e43ab1f70c56938c47cceb6ca57afd01500f809. 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/QZLL92218715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04eefd3b443a151f64b4c0b467a598503918e3746057e8318d6e3b0bb614f6. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZNN22235744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40694459d688ef8a600220aecd406d992f9a9ddf0bff34ee3b051d8c5d5e2dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMX2364170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb9f9e60f053167c7635baebee67cfbb3a4efe888e9fd7b0592824ef45ed5e4. 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/QZNN22321487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4949e2bbabba20a23891030cec8458d6dacac01013115ecd58a8fdba6e985c6b. 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/QZNN22321494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c3668ab79e93df08e43f424137bfd4c2a29d38a558289f07b55357089fe016. 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/QZLL92419027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e497491d0344a68b8726cb4e9a54ef3d0405c19dd40753e3241d2e059b8f42a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:49Z), 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/QZHN72549000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31925bb2f0588fb69400b24ac5089e3007d252e7daa79072b2bab0520c49b23a. 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/QZHN72548983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e4fda93a6ea62d06ec095180c50cb2f8ce23bc883f3629ba372ea7c92b603. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:21Z), 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/QZHN72531692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9eac0432ea45d925228c64ce8ce3c975394cdc3f1ec4ce7fc117001a36f9d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN72546867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4899749e0c414c3372ee4576e67aa9a467560f8697d6a465261fc3c8b3863e6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHN72531689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d13c1360a3a8ae26a49d3da6f1eaa8d93f1653f1129a562328a80d31f9db33. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN72548989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c4bf6ace8e672d2addf9ea353826508475b763bf3fc7a6ac377437a78b3d5. 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/QZK6L2550825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc8fa2cbc70e359a1af7d5e99f3bce618bb09c919da45f59f66c6538f4486e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:08Z), 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/QZNMU2517821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efb87089eb9f9e476df056ba69b132a679c90e6835800c1957a1f083f8dfc47. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ792583366.