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 0xde33360da28af10766b29464d73387fd09ab448aee6b7338d24ddee15d2b91ef. 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/df0a0cf3-8ab7-4b87-a48e-f46a622c4d29.json and https://artists.proofprofile.net/proofs/artist/df0a0cf3-8ab7-4b87-a48e-f46a622c4d29.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 0xe4074f9f87c69bb41c6bbcc306642a552ffdfa5915598515fffed0b03ce7fff9. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/FR6V81267430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7e7bc2844b5a01ece9eeff005f43234732f8e5bb2804743c7863555cee735. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR6V81267435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedf69671ba657a09ad79314d5bc62c2db1aafb9932f92fbcd2361c5a00e37ed. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR6V81256899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a85486449e642e52c4d408929bbd9064dc6435e2726eefb11336923f87c0f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FR6V81256900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aef3ea365e3bb2c41a2ab35ace754c52805f554821841e49212b250391f4ef. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR6V81256904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840408a7e09282e0e009520cce6d8425eb52aea2dd5a31d4ee00884af6f0a0a0. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR6V81271924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443d9597af3772c1a82c9ebde476ece480d113dc5f95c89b304f4fcbe7c07732. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR6V81271935.
L'aceddu mi scappau (Folklore siciliano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb858583d45e53bf0ce3f0d1c23d6c8e07411af722cd72697969a920404891. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR6V81269228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b791a53448899738b952d8f32e020e5c3a9e87df3747ebb2221a755f95ca8d7. 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/FR6V81269240.
Sicilia canta e balla (Folklore siciliano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab13f9b539da0a1a551124868d36eac79c43607a79ef4c14b49efe26e052c78. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR59R1805255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9153a571c30b911e2586d9ae8108b6eda150fbb05e9b0b265f2ad229f305a3. 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/FR6V81247008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf35edc168d668f47207a94da99ded910a44138f168be361129b9b335193a09. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR6V81247011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51f227cacc422a557a763669130d68ce51dda0a8006a33c2797a1014116d2f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR6V81247014.
Lu carritteri canta ancora (Folklore siciliano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12db62cc89a173ab9eeccfdd27aa1232f31deede19a42ab9989857853ce721f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR59R1810063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196e25642bf546ea490afadcc4de380d1b3dd35269acf64e33ddce60b8d64ccf. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/FR6V81256391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007059366b3f986cf9f3c6ded35e3eb9247623a6ca15289da31234332b677077. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR6V81256396.
Che beddu 'stu picciuni (Folklore siciliano)
Emigrante che viene emigrante che va (feat. Patrizia) [Folklore siciliano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49201edc9298b379f7402751dbac22cb8dfb3dec493fbd5c3f143826b2432173. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR6V82017105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d2a6414f1f6c09e1732b25f16cd3aa1d02ee97947effe2f0447efedb56e23. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/FR6V82017110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa892bfc2af10442403d192e4d3653381c982104a45dcf13e1939b2aab5b23f25. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR6V82017115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb75c3a6eedf5770fa7832f92c72c704b06b2914e0d218bead7e75b180801b8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR6V82505115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b87768725831e87fb90d976fccd0cd4d3294cca83ccfde1df0c9e868a3a05b. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/FR6V82505124.
Cu balla e cu fuma (Sicilia folkloristica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2823488ad365f4d6516186e1b79c599f5e18eeed32d070ef0e61f88df6bf3e74. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR59R1809941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb64324cd0dddf3618d3a8af2380bf6ff21a19d8efe6a4f6a9459653bfed3e1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR59R1809943.
Emigrante che viene, emigrante che va (Folklore siciliano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22e135da88eaca2a9e7d7219981673156367cde9e74f7ab14336f4b9f4ea8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FR59R1809933.
U curtigghiu siciliano (Folklore siciliano)