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 0xbda96fc13bb037c5000d96756438d0e00345e9e2d3272f23b33b5a242d9fe135. 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/48928366-5f2a-47dc-8699-95c36d86b937.json and https://artists.proofprofile.net/proofs/artist/48928366-5f2a-47dc-8699-95c36d86b937.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 0x297613b3c064795b7e63be07206726c6fab581b10d8c319c5da9e558e095dc1c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:45:15Z), 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/ES71G1925163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125094f41d1a07be2f79c44cf3ecbf1eacda3c06e1d5a24390569fc6185f85b2. 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/ES71G2038558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc35c295e39b89f1e3b0c4ea6d3fa943eba66b9507b3b1944f178a7179cb34. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES71G1952092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e652cab93e79108df0070f11bc71bfb49452ff43dbcc55514a110e86f467fb. 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/ES71G2100774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f40a8cc7065b32a3904a55a987c8b2b881a760d68cadbe622e1722305ec61d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:45Z), 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/ES71G2107603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc9d2420ad103743bbfb576a62980bb3547972e379ff7599c802ce5d5d4d55. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:34Z), 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/ES71G2057004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae41b3597a26e524cae27e3a9a6adfda9bd5cb003909e87dc41b8a8625681e. 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/QZGLS2441072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9f1fd3b4df47000b85d06cdce5fe3a7c37405b60a5e52ea4bd24701f7a271. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTPX2331270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2530db1c08fe4096939ff8b03b792a86d3f34e37157dda0ee06b7c47db3f2a. 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/QZTPX2337399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e3a3f8765f2a01a87cbdb8e12fa27a56418311cd6dcb651b980364a2c5953. 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/ES71G2029466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e367b6fc67f1f54913bfcd8b27dbadf6904e874bfb27118c13c07fd9bca9be9. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:29Z), 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/QZW9L2374943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75934e64222b3e82e263752d7402b40191a5ac7c89ec89d38bf3d7761cbd7e. 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/QZES72198128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc35c295e39b89f1e3b0c4ea6d3fa943eba66b9507b3b1944f178a7179cb34. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES71G1952092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75934e64222b3e82e263752d7402b40191a5ac7c89ec89d38bf3d7761cbd7e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES72198128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabd9553a6cf5511d33e7c93d319284119bd17abe5daa45e6aa26982a8204cf7. 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/QZW9L2353444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5916b493ee58cbeeb4159146d595216ed8e28ac27709028d0bd735b24ee674. 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/ES71G2419139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d555573195c0548ea500ed9b6662c411673d5d210d4bad549a9e1af046798f. 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/ES71G2419140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbaa4a06f4a45e5c7a3e93eba9a58c817a7da473b95875c1a6ff604885ea210. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES71G2419141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7899e56ef1649ff8506cfcebd156140104e860d26293cb61b7155d202400e41. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ES71G2419142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe5b5933ff705b92a0d8a700a55290ddef224e29325c5f033c004883c9ce1e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ES71G2419143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712d0c0ccd5b58e5d73b96e60cbb9c3f36eaf9a6355b041ec5993d778eb9df75. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ES71G2419144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5db536289750cc9b1949d3e76974901509e197cec03c247330b8a4b5deea902. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ES71G2419145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d48a6762bab52cdbb0fa4bc9d22dddc5d1dabfe78ef0e792094ffa25f9f34. 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/QZGLS2443522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ce5527998b8739ada498af527e4f4eb82e809f0862ffb0398d038616061c4d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJY2102830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b3f0e908df2096f644c291cc0ad8e7d708703fc618f8f34d6fcb1ea07c83a. 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/QZNJY2102834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f31326decb016dde467e8f07f821251dfbbfee6d56f39957acd6a500d8b31. 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/ES71G2222405.