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 0x450cd2a585806c33e629a7b3bb424b2435a89778dfc6f610d981ba9a39cb0231. 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/9fc3d591-d79d-400e-98a0-381fda916346.json and https://artists.proofprofile.net/proofs/artist/9fc3d591-d79d-400e-98a0-381fda916346.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 0x277b1566c4184960f0a1d22afae55dc640a2b24f14561878858a4afacb521450. 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/DEQ120405339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbda96821461673929cafa1963c9ae2896bacfe6ecc77917d27d24a218dba2d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEQ120405340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdfbfb5cdcaae6746e3b3e6d57b21c8f333944068870d0df120c9502b3e69eb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEQ120405341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4dfab83976f79ac9803499ce63005ec2374c0bf96a594e46590d3419a1baf. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEQ120405342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5996c000ba845d4b08b9534933a326b56c3afc16bc5b59918598d5ce2cf7ae2a. 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/DEQ120405346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e794c2949cc1eee848e3967a3191a8936ddc29907a218d36166745ca30c0a. 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/DEQ120405348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f10c8ff288e52caae41594b838883af29757098cc6455bd3d46c4c0079749b6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEQ120405349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962f49a88922792da86771c78bb6c3cecdc4fde357eee9a5f80c6225d036fb05. 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/DEQ120405351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c60256441734c4bc8736b4f2877f0a08f230395ca8997920613b4aee3841f. 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/DEQ020500739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ea7ecb8ffa5a31b80efc1881c2ddf167f1777b7b6f89506f87aa03bf5a7179. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEQ020500740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211bad291670acd5c6c6f6e576711e96e5fabf34741144067dac4324e7a0b3a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEQ020500743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2a3e36f3317ea7c4052cf9affdcb0b07b697d107d15f165a3cbf79c9518f86. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEQ020500749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53796810a335632ad69e67b229a37607e527512da3b6ca2e8137346df6c67faa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEQ020500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2c005b8865babade35772225670ecd63765d7c26fc4803a289e9b51972059. 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/DEQ021905244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe42e4bfc95b99e95223646ac7cee5364b6cf92f9ec46c2788d1d7053fec45. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEQ021905245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4baf66b7302c9e42fccec687bbfec66333bdafd992ccc30c51ae6965e7bc25. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEQ021905234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a2976cc831bc35057a427b4e464cda3f9cb681ef5bcda5adc8a00a87278dbf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEQ021905246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a1f0dca4e0decaa09abeb5ad480d79d088c4a2a9aaf3244dfb0215ffbf127. 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/DEQ022150770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036a1feebcd3ac06b85ef421d8ad222ee8b0ea3c95657556c2a45302fa72f17d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEQ022150771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed16951be846524b0572cb201be660d3c4a06601bc78c2980bce177245fddc68. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEQ022150772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f67bf116b122a4699bfc0b9315cac438a84d2cf61ccc26d66cc1eb71fc6c8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEQ022150773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b170b891c35146fbf58464754d9a79fcdcd2613b962ba33af3379e6a8d8b33. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEQ022150774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55b6b5341b176500f30750b0e901a5f45d50d2f76aa32198c2db10aef4c7a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ022150775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b801438644634dd5e02075332a056be3a7e0df6a17e1a36c3abcb92841168ed. 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/CH7812214539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe338885c065948ee0ed286de06be7d9f2019ad00ff6b39e0fa7ea14baac08e57. 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/DEQ120405365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da4f412f56af4d9f6bdf0c5212228bbc830c35a44d004408ac74101dc47aee. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEQ120405375.
Wer hat das Gras weggeraucht? (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d7d0db77f44541e2e1d0cf0e608ec6390ef3d157aa6f33f9c8134f868419e1. 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/DEQ121643274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a08d9a14a6e301d5a4c117247578d39fde2a82b25e898730e319ba77fc685. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ121643276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ac4d995b38a0e5367ceb49d264eb07439bef4f1b23ea3d0ca8db316d6e411. 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/DEUD91893079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b32ccb5a7911bc887b24080575e69a078a8c1e0254b4d7a2ca3a98a243103. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DELJ81826079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586c9ee01cd28111548ef8a0de37a0685fb2e092aadbdb450f125e66089543e. 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/DEZ900601545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba2d8d9fc90347679220594a0c5041075d04c0b7beb5f1c9142204fdb2cdbd. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DELJ81956636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf522ddb1f8114a1939b2434ba52bac3df4f962d6b44a4cfca37ef7fb6957aaef. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DELJ81956637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638ee523272b6d948186970c2f7169cae20c221a543a7b9b38b2ab5a5519f4b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DELJ81956645.