thumb|right|240px|Oxmo Puccino Abdoulaye Plea Diarra (; born 3 August 1974), better known by his stage name Oxmo Puccino (, ), is a Malian-French rapper. Career A longtime hip hop fan, at age 21 Di
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 0x72956eac86ab4dcea4fc5b673baa694d3444d754b1ed1dbf94ff74ae0751814c. 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/f92a3bfb-a5a4-40c1-b9ad-7b33a0749ba4.json and https://artists.proofprofile.net/proofs/artist/f92a3bfb-a5a4-40c1-b9ad-7b33a0749ba4.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 0x3e3bce6f4f56b1dc50dee5bbfa9a9f97e832add9dad85bb88f7076360ea0ddac. 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/FR9W12428000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6483d83423f0831f76c05b13383ef2aa539cb2277878376bed82cb893a679b01. 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/FR7X62400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f6009be73a24ae077e650bb7e122d7adac252ffddf8c900b3e8f8729eb27ca. 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/FR7X62400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839c13a74b49c331476b4ab6292e4768665062892ee5be90fb726159be4d6a92. 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/FR7X62400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fb95e18093ecc3b0bc8ffceaca22bccc60ca1f1b1197a37e96580fe00621a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR7X62400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa041c6dfb9309bc13384d95af104a4527ed6af848e6e829411866c076a776a. 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/FR7X62400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed4d507be808814f67f482c579a30f9e60132d096a3df52f2379f7f56f0d982. 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/FR7X62400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685fe6f7e645669a5330c5adf6ceb6caff652ccf3031a7fc05881864c9854ed. 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/FR7X62400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8574f3c46f9ce8c7c258aacb661a1b607d9a08d9bad41f18cc3b1373d0745918. 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/FR7X62400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d735d414933eb944f279dd67e1bc5341df02ab1e02fe3031cab0b3f637287e. 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/FR7X62400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeee424f7a510ce86d49334dc009e1b8a093e2ea90c449e482fd2f0fe69358f. 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/FR7X62400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f706e5b113dd75322c541778e629b79c5e07f1d43c5e15bb09e985ae8e856. 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/FR7X62400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ebb477000310cad63da5b1e174504ae1a4c0ccd2c0b527a24d6bf01c171939. 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/FR7X62400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325262376f7855d9ed2608c1469250c206c11dea07d31fe42fc1b1cb3f9e31a5. 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/FR7X62400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317cdea2effde40613c0484e872903f9f481f6151133ec6175ad8c4ae296f75a. 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/FR7X62400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6b9f7b2ccb5974268a5c2c42b967bc049a05b349cec18976cfb96dfa07e7ec. 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/FR7X62400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec40182f95b1314339a2fdcf8cecccfe394486572abd7202943d94a966c2c667. 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/FR7X62400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e982c89bdfa9effd8913df5c6eb24ba6346509de4eb6830ac10283fbefa35. 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/FR7X62400150.