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 0x91aa6bcb03320a329d1fc7a8c6760d6ea0ed58c4eb86a5bba30de953f7cb763d. 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/11c5e9f5-ef07-4113-b2c7-f1daf9bda5e7.json and https://artists.proofprofile.net/proofs/artist/11c5e9f5-ef07-4113-b2c7-f1daf9bda5e7.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 0xcfa6e67c6e352a8cbeecc54033942837cb59fc3d3e03d8d5b5424f9b2e3b4d70. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKE022234152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105e43b39f761a0c85a7ab5ca4108a2d036c917a893499e07e18f1aa25c001f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ172200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cef045b2bc0b2636356c8150214e5f7bbd203c6f9bec68d9bc3d8ed402275. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bd4608fe5abea1c1589b182a13642baf03a84f2b2c0d2a5be0425470eedd27. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ172200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6461e15004cace822df1c4fc699a0f27e2b0f9c6215f6dfb1d8d5e95022d68ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ172200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d4e73c7ab56b959e6115c1960a4a19223bc6d9f6abf38a25a3f0553a8e537. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc632cdc47b2f08406e80cb21ace84fe0884c964942bb631872c8acecd9bde7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ172200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa080a80b188dc82376ab306d3d4be0712bbec33e1361dfb19df21b56d1ab6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CNZ172200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693699da3381f89502226c8d8be16424b184b955bf145fa829d4458fedd8a7e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ172200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50d0f2a67b3bc1b465d204ba84e443dc9fc1cb4926c228bd69a65a84664805e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27163b96ba5c2c5bcce6101074d56c9f73a562c1b1487cbf5f002a6fa6a6b8e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ172200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24144758a6ec477107b52f258bc396e8c3270d454cd38cf454ffd379509d52bb. 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/CNZ172200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b9674217c2539a484095d8ad59be82ce6bbf7cf9552c1212a1b63ea0a4ba35. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c55d8dd131f8ea3eaede022b78c480ddbc847b23c3f67afd547160f4c350e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6cbe9524fd587175121033aecf3825639ababdb16af1a2cbb91da3acdf333. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ172200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c56899ce1944557a864cd6735c326eb63d0e6d0f70e6c28ac5b1755a3e3f1c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ172200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c567f0e1996c081f78bfe543b4b24a30a6538695bc2c2899580f75dc946fcf5. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/CNZ172200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb50dff37767c6039a00f0a052631bd235b0d5d5fb6d2cb62add4f2d918fff5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNZ172200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001ca6b60103cbf3106f00c0cf50ac69d1e4fffa2ec10abb465c8fff44139041. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ172200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcad50f8bc2cc1ae7c270889db7f8c1511db75f308cf822649a46d9e6828ee0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ172200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d298a5055c119521be94ddcaf25365f39b1f70f4c0b98388002d719b6ae1576. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ172200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c46283030db3003856b66bc61d96d87f6221340f585e0ff03d1b6925f1a59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNZ502200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27163b96ba5c2c5bcce6101074d56c9f73a562c1b1487cbf5f002a6fa6a6b8e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNZ172200098.