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 0x3125370f7909af3512451283d87323bb2f4fe1ebcd4986f8b74f447e447299a5. 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/2fb719cf-26b8-4e17-8e07-136e017ef98a.json and https://artists.proofprofile.net/proofs/artist/2fb719cf-26b8-4e17-8e07-136e017ef98a.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 0x172019751ed95df0e88d73a627b96f672df906306f754a07d39da166bb51c659. 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/ES5151701649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a0d5915b4567be9e54404db9485bc1bfac888aba8b2cf3e443582eee1ea75. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES5151701650.
Bartók: 7 Romanian Folk Dances, Sz. 68: No. 1, Jocul cu bâtă
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627d7daca98232a01aa391e18047c3a00c4a604a6298aba78124c0d7961f20ad. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ES5151701651.
Bartók: 7 Romanian Folk Dances, Sz. 68: No. 2, Brâul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d52bc671eccbf36005c3b7ab5f39d5b2c3a5808817e7bbc5f8a372575d8e46. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/ES5151701652.
Bartók: 7 Romanian Folk Dances, Sz. 68: No. 6, Măruntel. L'istesso tempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a3d8166b976314c20d24d5d5118db6de93676a3221252db57dc995f4941ab3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES5151701656.
Bartók: 7 Romanian Folk Dances, Sz. 68: No. 7, Măruntel. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115e60a489b7b2c5b7ad35162c844b15d157626102e14a8603344e4bda4494fd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5151701657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f09a5d7c629584d4af4f4fd1efc7e5a3222bbf90bd1dd6dbd402ce11923435. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ES5151701659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fdd3b415e8f42553fd0a296ad36338a44a48091cfcad8e8eead210e7c452b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5151701661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd99cea33eeaaed63476f7a18ed2f21e9049f502b8e4bb8c21f060a5c32180b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ES5151701662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b36eebd94bdb6e399f25854053bf9c7f55dc75cd11ff0a27c910c7533ca591d. 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/ES5151701663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b9abd55c28b28df27bdeb4b0fe1faa1151be136fc33b02318226f5bba0c901. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ES5151701665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea29eb6775a4f3cc922af27908063a5c327ef01296d6b83caf0c0aa44908ded1. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ES5151701666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdd6651b302b57a27df3da78eeeba7e729e6609312fd69d008ecad543356bc0. 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/ES5152000688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee0b1437f2d0764d2c4f7b1577d51b7ee44b37e6ed1b50dc9f8e4e33a78d868. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ES5152000639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2962cf430b75d6bde294db4c5fb995b538c84b33468c67c62b57cc6ff2eb67d7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ES5152000683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271dafc5e785aa876dee195e9e340e2f1c60ad60a58f560c7ea4a887921caca9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES5152000684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55504ae2dc9b01fb4922dd2fd7d84e88076903e93f6bc6922aadbe09f6a51d0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES5152000685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b186c0be9b41cf3618402a5fe1f950a4136b939ed783fa3590acd411f5b87. 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/ES5152000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dccbac09bf0863697a9abe57d029abd479be96b24c2802c9cc26671855c9e8. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ES5152000687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe444a1a9b9b82c4c534605255556176794600acaa99f48e77b0a5975e5237f5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES5152000689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3137edaa5d8b8f3d08a44e05d08c30a03e8d90f8c1f45e599a090700fc26e02e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5152000690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ac202ad1cfc7f6b82efed98dac037893830affc635d01e50f9c286f745061. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES5152000691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccdd9b4250648d38fd6ce01ac44b05ee6cce5b5b711ddb2e7fd936d50d557a8. 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/QZDA42425600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10a126f8ef6ba60ca9f17e285889cd74652423d8755c238037a2ede1ce7ae5. 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/QZDA42425601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cd2012e64fb32e9cebe6817e80934b78ab68ce55a08a199be1136965fc5cf4. 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/QZDA42425602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32842feb4fbbfa369801d4cc1987e2257e85d7e5ffec010ba701920c1c5fb189. 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/QZDA42425603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac5c790629392ead328a59180da2d32f4af806c7eaf6df7fa453f97365d270. 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/QZDA42425604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661755ffab9d6ab1d72b764adb63d4dd5698f0f166ba25fd6fb5f248cbfc084. 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/QZDA42425605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b1142c763455fa74ee451ff4badbac3c76a624604ddbc6a80029100c549b22. 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/QZDA42425606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10522ea56180292ae7c373584714fc6dce4e14f8416bc5f3215d3ec5dcaca4da. 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/QZDA42425607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3041f7b04ec2ac10d36f1128c7870a61c88e0a200549c0f98f4adb42d52367f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ESA092506595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b08386950e3f1234e420b2eba1939a97f23c877527a103dcab0d749b0c8c22f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ESA092508518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8a7f85ebf5be07246cd832f734661621fd423d6a5e21f7d30e04cddea385aa. 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/ESA092506589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c294a3be61412eb839c78286584cca32b6f552613573db62ae91429e636f237. 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/ESA092508519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1350ed356313ba1258db914a455d36e5d45e4529b23a93e40559fe5c1bb0dc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ESA092508520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3041f7b04ec2ac10d36f1128c7870a61c88e0a200549c0f98f4adb42d52367f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ESA092506595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66e0b11f19f878d1778c9a28722515d606a30153deedeae43c9d2fb06729bb. 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/ESA092508522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa778b1e55f1a40124e41cde1b684824a40a36c23d2592b4e8061930ba33a00. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ESA092508523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772517fb332af34fde4bc228fa1ea279625beafa3b303b021984c54c27d4cc21. 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/ESA092508524.