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 0x936d57b8f36012663995f4d179bbe2ec0927cb795e7e43214e2f6409ee7df236. 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/104f1cf8-2ec6-436c-916d-fdd833c57a05.json and https://artists.proofprofile.net/proofs/artist/104f1cf8-2ec6-436c-916d-fdd833c57a05.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 0xfc4b5e589c8417cc89ef7694edf1607ddd2e8b31d280d6b8314650a09ea7b967. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USHM21301935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea5dd5c0e470470aa6fb4c73ec7a2159c934b10b2cacfb1ab37620c50335e4. 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/USHM21301937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260c01c77d2bf389548fa64708594be150492b3d107d7d2850d5452d17c38ef4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMZWU1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955ed2b13ac667258086720cf378693a03778618b9cef7576edca47568e4f9c2. 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/QMZWU1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568581c0edc1cecb47c5b301b58d2426d335d0120b30792410a86b899f0fa05. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QMR6U1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6cba7e6d2ea17f42da1daddc2c64189282846c3c63febd73cf493d1d84ac1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMR6U1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa826ebb8d8d04790c82a49265e2d88d76d35763f2aace4f3a293ec4a03f99da5. 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/QMR6U1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7af474b7e5b4b8129bbe8a28fac4aef55ef33e9b752efda0a1873e21da17df. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QMR6U1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e85c1de225c49ebc6325553f5db04d4845e4470aeb2bb34afd1d89affba4f. 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/QMR6U1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a25812ae1c057b296fe646ba072c04806034e687aa25b9ca888fbe96d318424. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QMR6U1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34639b0d5c74b9118a427e63e24d2abc12380289362823cc9d876e8e6003d31. 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/NLCK41090929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88d021d5441b5f576c7d502ebb1feb9fa0e18f2144bc7db36ab224037f323b6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/NLCK41090930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca15e4a81fcb10ce4578a5a297985e7863e550e29289a9b3b42044fe27dccc5. 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/NLCK41090931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a6b21c6c53a20d21291ad74e007d87eedbd04fadea5360aed139a5ca45bbf. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/NLCK41090941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4db403f7c90a54bda95087ae404674fd8365f1ac5928635263a94e075252e7. 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/NLCK41090943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92993fb4fad4af3e281c8678cc960ac8babc4dcb43c365faf349642bd4ab4b89. 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/NLCK41094035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf3cd571d04bac720ba36596271013b91a53d1e08b340543f8ce61ad51dfe7. 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/NLCK41094039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98231be50152959391195e7b8dd9718931b0c036e33dade437ee32e59bef710. 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/NLCK41094036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92993fb4fad4af3e281c8678cc960ac8babc4dcb43c365faf349642bd4ab4b89. 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/NLCK41094035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c334a274014381650ba0ad8bc961529ee2395af7d79593a78e459e5b1f171. 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/NLCK41094037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5374f2c73eae1d5149144610e36aab0f5a045b976ed86d159e50f601cc3094. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLCK41094038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf3cd571d04bac720ba36596271013b91a53d1e08b340543f8ce61ad51dfe7. 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/NLCK41094039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b898eb27432706ff576b65917c879395a8f903b410df57192694116a94419. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/NLCK41094040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd318bd2589084accbf9d25ed024da7dbda78d00fb735adf1550da7f305fd8. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/NLCK41094041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c1f1c763d878a4f722f68f312953a964b71d492a816d9413d1ceba6e9c986b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLCK41094042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cefc777312efd8a8a26a8860ca8a8afdf475dab83665d686b5fe34b1eb0426. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/NLCK41094043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52a69b82fa2f7c5dba855c15313b82e6c3894c9252f099b6849214de1038451. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLCK41094044.
Trackmania NEO-CUPRA: District 1 // Velocity (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab145a5cec2ba84b3386333b08c81b6cb0e2c4cff02b7e79db2710226db093. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMZWU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb6e0bb55b5c643feea7ac802cf2f43711730f338ab594e7810c655cd18b5d0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QMZWU2000008.
District 1//Velocity (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0401a0de5ecf3044ecc85b65ba2a4a85e6632d2849653ee527494fca3fed5daf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA2BN2303515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc267fb465df71e6bb624f1345b03dd54ab5b18a605f7abf78192dd08c18e5. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/CA2BN2303516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f2c0e078ed429886d26d4b78f66a67ee94b29c13b451e74e0eaae6372af2d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CA2BN2303517.