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 0xc36dd8f5e8f3834fa2f9e6d1914e9cf37fea9ddef733fccb4d5d9b9e320493bb. 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/df80e915-d726-41dc-88c2-56bcb7f361f9.json and https://artists.proofprofile.net/proofs/artist/df80e915-d726-41dc-88c2-56bcb7f361f9.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 0xbd89e1ef3404b036af51b2d7ae4144bde1a6ed2afbeda7b99f22619336f7d66b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FR6V81293554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee2be5baad7c1a21d227f57c56b8fa07bb0559fc23cde828676a932d51be267. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V81293556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beea568ca8f18d40336d14e8312d18fb0b7668f46771cb0945a4276183bb28b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR6V81293558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b42d89b5fc6f11cdaf9de2c98b24c4a531b43753f19a81e29a2fcf4bbdff55. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V81293564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a84fb64ba976877551521765c5b86322a39e053151b6be0b4823bbbea6ed8. 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/FR6V81293566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd44479cdbe7b3af9a2dd1ec281c71305594c39e691f5890d78ee704de2ed13f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USA2P2252274.
'A STORIA D'O PITTORE (Versione originale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b081fe485c16aeefe7fbd8e6d91234458c12a7c44e703ee1afdad6586d822. 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/FR6V80339162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e20a071661ab3e67de7159069e69343b584b5f823916ebccc73701e5685cad. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IT8TZ0361501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf683bfbbbeb2a99a414f8cbcff3c20173c3a73410bdba9ae802df9703f3836b2. 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/FR6V81279727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842ec7af93da946d9e7d5fdd95499a5d87c64b261666fdf3bccb7007ba7ce2a2. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR6V81279739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfcec7d9eaebb977f54c4ffff1d4cdbd12ed156a851a9f9d72b81c5b9f7376a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITA618800615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a8a79ce1bbe5eae87f867d36c13197fa99586ced3a4ee221a113a3e6b27b96. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITA618000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6454a1f1e21d7e3690571db0af788de02959a604f7f087af074ee2770aaa7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ITA618000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b3c45d1e608434ba0530920fad4c39c3341c3dfbf9197e3136a6631971a7e0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR6V81280230.
Gli assi della canzone napoletana, Vol. 1
Antologia della canzone napoletana, Vol. 1 (The Best Collection of Classic Neapolitan Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531aa8883b792400dfe503af088b2f875303789326983c465b0b1b0b431b6f44. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR6V89302740.
Antologia della canzone napoletana, Vol. 6 (The Best Collection of Classic Neapolitan Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee2ef77d88ab447c567b3b7659cd30afd1f1172eeeb4a376862f97f34b65614. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FR6V89402864.