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 0xf38c1a87b184be060c572d1772c521bf57c0f3d5e4c6093712ae76dc8b32a3ba. 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/2c4ac5f1-0c2a-403c-aaaf-b48fc2526390.json and https://artists.proofprofile.net/proofs/artist/2c4ac5f1-0c2a-403c-aaaf-b48fc2526390.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 0x24dfc3fc48317b08ff064ab6cfc1782933718f77438bcf0f96a3cf166a66b9fe. 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/TCACQ1681427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0cdf075189f3d2471b063d92f9d1090bb964f4c2bf46c4950c0b9771219ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCACQ1681430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b896a41d9423e6d386fedc9f3538b43450c4807ff70d216c2ab125b6507685b. 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/TCACQ1681438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc425ad2a8ac9df93bf72fff4040485c9ad5fb3d4b22db831b0dc36574ac3ddfd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:04Z), 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/QZES51841510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313bc544b781c450809ccc0628afcee0dd03ea4bc15290f4b319f3f79ebb4f80. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZES51841511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb214b15dd240335edaf186c46d658bdb3edd903f094e060bae7d0f1642476c69. 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/QZES51841512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39abc1378153495acee8c5ead740369a011a30844c88dddc9a13566ec1115696. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:06:45Z), 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/QZES51841513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4623c50508ba777735f1efb4e48263fd1bd54cfa190fc960ef902e128ea376. 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/QZES51841514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74765ddcd1abac07f152dc00a9173fcf6598274aded3972cb0166dc27705a8b9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES51841515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4c0b261c750e117b013f7d91817be53d14bed2ec6e6311be0cbeb8f2b1f36. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZES51841516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f113f04fb51919b275e6f3611027ed705778b56d8d58d19c21076186d2796ae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES51841517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fce9c29af9041666c945b4f2a544e635aa631580cf11ab9f689edb932d5e02. 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/QZES51841520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99d511d2045047dec090f825a137565c5f17f6c5350e19e120e03908fd3b64a. 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/QZFZ31973489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22969cda0c8a2b003189f9ed6548577f2aed67b46bbb0d35681a009b84e0ce1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA72126897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ce50df33bf7fe3414a11d4d42b783dea63db6263d6703c0a3a17bb29ed2eaa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN92112683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca573164b8ec3eaeaddbfc8e7ff2826a7da741977b3e19b28986def437a302d. 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/QZNWY2150826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43868fae52e6c516e6061882b0c02e8840a6628a3ca608d5b16bc312bd7aa9be. 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/QZNWY2150828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cb63f0f269db08c692ba57d2bbf3795edad0e97c31bdf982957caa40411216. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWY2150829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a8058d38a7112151134f1a1d4dd43832f091a6e11d925f6b1f76b58a329af2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWY2150830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2eab279c6afb6530e866522d3147ca373c414df1cfdb538cfdc0171af56dee. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWY2150831.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f74038fc3d3d7b10568ae11bbea66e5c0f713c65ff2484847829b79c524d0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:16:36Z), 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/QZHNB2268756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e42073e8f01c66b323fc44dc96c1f4430a50080bc0b6870870043744a98956. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHNB2268757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67faa8263767719f38b63f78a6fb0265a22d3a35922da692fe3b6df6edb01b81. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2268758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7fcd5e3caa6673619a5bc503a32d1f42bfc7f396078d095bd917dab4a691b4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2268764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd09621436fba2ed7b487df00de088ee4c4eee2d79d66907fe77ecf0d4c3943. 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/QZNWS2289590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82961e3e5039bec532ef611bc250dc6e79b7c7662ff8bd4f579544ab47bdc3f. 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/QZTB22263818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f32a44d31e58d3b88cf25d8fd6475992caaa56e2447e0e831d27d746a9f17a. 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/QZMER2348209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1246e3faf7d1cd6526f5c42029a386e9c7df282a176c70a93f6ac0ffa940d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:02Z), 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/QZTAW2421340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb914998a736f26a5a8c62bf2ff2bf7dcca66903a4171b5fa8559616bc92251e. 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/TCACO1645404.