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 0x8a47cdb23fc2d1fcf995d31a0a56b3d5110201127b726dd37151a71392eb49ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a545a436-a192-4f27-b93d-0cc187347fcb.json and https://artists.proofprofile.net/proofs/artist/a545a436-a192-4f27-b93d-0cc187347fcb.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 0x0e5c4849352d59af419fe477773a7fbb340ab7a8a4933099f99aced54a9ffb5f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/FR79W1100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2e980023d42561a69c500c1591300c69ae3bf43b5739d9cd3780f580bcb06. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR79W1700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7084836f34bd0ee86233c9d2d5c6655f275dab1e32e07f529af4e10322d53033. 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/FR79W1700430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74b43f2512540b9adc5de15290c2483d26194fb92c442946b149ab1ea1ae54. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12312649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ea8e0366220bfa4ddf2c7bbccaf43aa1c7a81e7276c5f4f6c94bc1fd94c298. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W12327915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93701ad7f197a77e798af22ec8104be80ee1316ba86aa27d1e0211e5f2bc7855. 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/FR9W12327917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c614b3319692592738844a0932fbcf73c2fde00a9810de4a4f65e340c731b85. 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/FR9W12327918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070fe0fd31f378c2144a52cb644c6e52765cb9a9ba8ec6f62522eda71390a1e. 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/FR9W12327919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b3337ea3a2fcbb14abc6e0336ba0f156f54fa75ba36255c53b0d392feda1c0. 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/FR9W12327920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b5dfa2cf30f970e28dc26fef751c7b939d7b700fe6c0f8cf510c93d4417f4b. 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/FR9W12327921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0facf22b846a3e34bf054d61224e2de19e034b1f48cda0bfd17ca0ad8fb21087. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W12430878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2071867de43573aea1853b47f853e697c9901779cc07bbc9677dbfb9420668. 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/FR9W12449141.
Homme (feat. Barbara Pravi, Camille, Clou, Emily Loizeau, La Chica, Laura Cahen, Nach, Poppy Fusée & L (Raphaële Lannadère))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f62f006f5c86e6e8d0a17dd1593ecaf785586e896888e97e03a57a6532bfded. 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/FR9W12434787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933ee9b515e9e7855cbcf6f6800ac27b64ca42e69b5669e51c15f3587f4f5f3. 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/FR8Z01600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4f3b315ceb8fca504384e84621d9d61e6fb02b75d60f9455f6e67316572f89. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR35T2100030.
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