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 0x934be5874ff8a2d2a535f7b0f444a9323b4c4122d8c797326f445d33e08b6f26. 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/bc82dc32-6196-423b-a477-9f87893b6b3b.json and https://artists.proofprofile.net/proofs/artist/bc82dc32-6196-423b-a477-9f87893b6b3b.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 0x1f615d7f2bb97b81c9bc427b4c700a106888f6903c1d766794bd358e3ed94079. 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/FR6V80539060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b9b2e4824d0562769583912c06647e32b2ecc954edb8af57a6544030cc057. 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/FRD651400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b9b2e4824d0562769583912c06647e32b2ecc954edb8af57a6544030cc057. 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/FRD651400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ff2e84c9af7262c0533dc76a33b363b0338b3fb2bc02b5f3d183f973b961f. 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/FRD651400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bdf8afcfb5c2fc40735e8296930097c7dacb52233c0a15c8035cd85cd8d290. 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/FRD651400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7da94b3bd11d078d2d72c8e58c321a100415220abf9d6e9faf70277055b1d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRD651400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac50fad2ac3c84976cce68b47a25e0ff97013659ee045e8014bcb533910bf1. 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/FRD651400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e8176b5d4b37e0bee78e070ce149b9c5b12cd165f059d7731b9d7bc7322753. 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/FRD651400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da0373d0f73f1fb518fc8ab31532cea3f551e8fb344e3525f11abb355d1304d. 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/FRD651400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d34fcc4649f60bf8ffbe3922bc4ed096e2c65f6aa4df88f64935fc8173c84. 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/FRD651400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab915cafdeb1e04bdd2c45ae6f52ea5d065bf3555eaa02ba5950b361f52d1a. 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/FRD651400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7da94b3bd11d078d2d72c8e58c321a100415220abf9d6e9faf70277055b1d2. 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/FRD651400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec70ca8752615f4eb090d0e99e3814b9fb0cfd5b2c6d6fa85e075abf6e0bba. 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/FRD651800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148b18de7cb6458664fc79acbdccaa9f107e8b236f8dc932350a7e8d350f26a. 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/FRD651800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341dcebf45681669a5a23fef9118bb0e25f61144e288ec268243fc1fe4f92be7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRD651700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c78ad27723f08ed85e47377e0cd53ddab5e0f758f8f9af41e78fc70137b82. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FRD651800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d54ac71616ba459fb7eb08b1f45d82f6afb17651c1b22bcb9545bdd7a26be3. 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/FRD652000285.
A quel prix (feat. Hös Copperfield) [Extrait du projet Carbozo Vol. 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb028519179845b90db6f3526af7dbebf6b3254ca1744729c71f9a648d9607a0a. 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/FRD652000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc33351e208df700393c26009a8bf55ca2b1b3aa8045b95748641c9cd038eb0. 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/FRD652000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056aff616ab0a38c911668babb94898db9e6808892e98a60202cb5cd2b8022e6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRD652000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d54ac71616ba459fb7eb08b1f45d82f6afb17651c1b22bcb9545bdd7a26be3. 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/FRD652000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e41c5718ac13a41a78cdface5e1988d2893e7dd7b8ffc6e547adb1773aa9c0. 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/FRD652000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4efb3e7d2e844b9dc88eb45ef46acf63aa61bc245ab887d7e161bfb829129. 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/FRD652000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8753a878ed52d7f90ce3d73466f6ba048a57eb3cbb621336854226455e9f385. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11611305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e63152f0b36deb44954e279f5f53045129425f8924c48c475daa5e988c8b8. 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/FRR642300472.