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 0xe7a61275426011d50f8ae462d887a5c8c1b3d15a67216326bbeb2dd0a1161c26. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25ba5a27-5b83-41b7-b161-05e2bff8fa08.json and https://artists.proofprofile.net/proofs/artist/25ba5a27-5b83-41b7-b161-05e2bff8fa08.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 0xe7f81e9a59606eee3c6d0ffa5364f952904f8a1c0face7381cbe7e4ca1f8752e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM4TX1753525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6923709119baa16e7558bcc559d0202bbb2fa06d59416e53c609e5e4cc794d. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QM4TX1753526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d864852d38ca20808a688f4278a01add1323d9215922c8a8378a291fd991c13. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM4TX1753527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce90f1910f8048ae80810156e8276d9d465d76162cca6cf6c3633b0393b782. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QM4TX1753528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98adb19091f1c30e930e798cbf587da217a008f6cb3eac973bd35bb8f1902aed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ee716aa372e89b14bc0f57a1018bae52a9913a4ed76ac01c96b99bb72ac827. 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/USACU0503709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764c602a5253ac3d054d7fc6690a221ca3e38856c4d4b74ff18c81a6277782ce. 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/USACU0503710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc1ed0636f58070f4885a061d66ebf66fa39c850bac3e93dfa3b4d1f5f19f99. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USACU0503712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2780284bcd319b7a043fa3b22d9a0d99a344686cd2a7f1c6bc5481cbb15522bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USACU0503713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4724df05128b7dcb48afd048621533a76ee7a4d8b7d00ee8aa027065a453276. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26bc2e5ebe234f77c2347d33621bfc5fd72bd0707a7e5f580f21d9443e674ac. 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/USACU0503716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0e09c9f20a30de9ac5b300ce8d20863b3aa320767e65bf334c7e79d8977063. 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/USBT21601313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33510e75135707012c12711d9ac9e8ff0a85f73435e1b60a5e6c59ad6ac413e1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USBT21601314.
Everybody's Talkin' (From the Motion Picture 'Midnight Cowboy')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9214826e05d31eb523c7dc25a5b55c7f32181e600c95291c1b1906ff31fec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USBT21601317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf297bb4415c8eaab2b02a6d54f9f6f37183e1ac35ff38a35c45bd56edde00969. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USBT21601321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c44ff7f3f09d5c1187b9bfdf104b2c3a811fb5d3f04f7f4ef03e20cf59e0c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418bf8dc76b6e1c3a52fece232f5dd27361ef6ae5d735720fb97fae132a74966. 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/USACU0503371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c3704f1805279f5ca91cc4f1765ceedde936760c7684a3121efaa9afed8b8. 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/USACU0503372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacada3af9642e88e6e6d3fe3afd51e9204e97f666525ed04e32eb40aab3a3b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80bab73f7b3022475289b14dc93c3d2b0c24ebad270f75d5b30f38a46e2f877. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USACU0503374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d194304b89fae6bbedb9518ab4453106c70d5229c9d806e08607b76cbd88d72. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USACU0502071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0585b716566d82c506f0702ccfab69ff9fa7aa52a36bed5480a2f89a9a5a98. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USACU0504851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f9b7cc136ba4969b9c632fc1f855b3d22e3c961641df8ad7ab3a479ad700a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb549612eef2b96e35db52749bcc82af00fa2cf3e4ac80c69dfcfcf7ed0cc6b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180e05a737de4d009e04fa41a591cb32b59e0d7169a381e973f9a97ddb68e13. 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/USBT21603623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b680c3fafcb10b8d0f2db1cd24fad82e1a8516bc4677fafd0e740f050143ab7. 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/USBT21601384.
Music To Park By "20 Great Romantic Hits"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754287a27b90bb40ed6ab1dff96b2d8d2ce5b618c6f72c04cb52ebf90d199252. 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/USACU0512964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71fde1ad3338f4c420e9f87286b17cebc53541fba9b73d251dcbfc8b871ae11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0520001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c3704f1805279f5ca91cc4f1765ceedde936760c7684a3121efaa9afed8b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0503372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2edd8a73f602047c42c472427a205bb9d4b8067eb84309e375fbea806b26762. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USACU0507666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac57d5ca5020473d9cbc4b4f07fc6740e2ce0eb9796d621b2ba147258abb0217. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0507667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b88b1c1a83a4deae9bc62dd79b88586725cc142177ce380658e6b514f23e0d2. 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/USDEI9802758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0585b716566d82c506f0702ccfab69ff9fa7aa52a36bed5480a2f89a9a5a98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0504851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568068eec30eaa66beffb57f3b157542395e9a6cd130863302a71318a8c7768. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USACU0511318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b79de40e11e47e26200d9b951c932d1d431d735981b510809d84fd5fcdf1e8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USBT21605175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46fc62e9c40986d9ab88616b775ef8101627c7b921ae6481e14e287eab9aebe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDEI8404234.
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