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 0xe9498c0c7076350b01c0b241a9514057b3a8ad6255f8945df6393c8be9d6beca. 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/84b71f35-90cb-493b-a6db-b811155cb7cc.json and https://artists.proofprofile.net/proofs/artist/84b71f35-90cb-493b-a6db-b811155cb7cc.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 0x03d87cfec6e14823f5a8103c8fed4000d0a47d956793a418697b086d4b137c4c. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/FR43D1706650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2f8a5e93287c3179f205ebaf8169ef7a986bcf04f7e5f6914757523baf5482. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR43D1555712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec7b386b991f34227ba5879629651492dd77fac9c2da4f0c41a123e1e3f8f4. 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/FR43D1555715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308ab8dddf93f94a3456c0faa295e90e5f5c9e5e24c234169b6917b73063c647. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR43D1709520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90b5fbc91e3d1df35e91974a5d52dcbc4030e543a4d19b696bfd907d1c4eb86. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR43D1707520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997687c0093197a3e33ec9f0485e1c1a9a86e623b02fb2cb2a5d20227ead4e22. 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/FR6V81183774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a68ff779ba6c13ae93e0db7445aaff593abd1d1279a06d79400253f356e7998. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR6V81183776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b5c66ad3701e0d8fd277756edd721150e1728051bd8064cb8a48b2f5e8e3d. 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/FR6V81183778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92d25358fdaf499cec34d634d7cd3d91d898de3faea24d5220ad1930967b540. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FR6V80692463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b6c07e9cf178aec4abd5ee4b6f6dd089b38da994a5ed88b99908a3c4391405. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/VGA011115505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f6b2b78325d6b199fd3d706e79a19ddf998a9edb6be3b723c1ef16a34f04a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6V80156989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6972a13732677bcee2e6af62c48ab1a7058aaa7fb18c9b2b7ca2a0cf81bcdb. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR6V80156990.
Fekrek (L'âge d'or de la musique populaire marocaine)
Khayi (L'âge d'or de la musique populaire marocaine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fb75797ebcb9e821bc68d2f339df0146133baf3bbd93fa0645f44076612c2. 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/FRX871514671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbabf1779b526fee99d70eb496e50673edd84ca0ff2c7dd5686a78b0c7811503. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRX871514672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e318ddd2ed7dd253918f1233aee83d000a0283e6f2f770bc7424af39f9bca9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX871514675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c0d8d3cac119b71b5109ee4449f4c9e072f7ea325fdc38b730becef02754c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRX871514443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3e204d808d76d6ae6fdc54ef5fb205c62b3deff1b2fa82f4988ddc5e64f64. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX871514446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ffbe0c653d4ecdb2c6461c175301300d46de46712e407df52d1406ad4578e5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX871515064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26d094d7766abc9f3d92edb3e166d2c3cec42d7b313231f8b2747984b020c5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/FR43D1717680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049bd09617d8f84a46f4835f8fd6f429f17f465be5fdfc0680450b318e731901. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR43D2000420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed5fd0937079efe589d928d0d3edea1fc8ca9ddce87c757e28e9993bebe6fa. 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/FR43D2000440.