thumb|upright=1.3|The Regioni of Latium and Campania Latium ( , ;"Latium" (US) and ) is the region of central western Italy in which the city of Rome was founded, the capital city of the Roman Empir
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 0xcc286e606f5edd5b75c61ab488b7676456102055860c552ad877e382609dcea4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6d6865f-aa1e-443f-877d-1511bce10731.json and https://artists.proofprofile.net/proofs/artist/c6d6865f-aa1e-443f-877d-1511bce10731.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 0x0ab3b4d28b111157a09c7fc7a71f6a42eb9044b76c0b0db8e1301c3652d09a21. 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/SE5IB1600674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80001755dcdd9cabb55e90bc8feda3461807b3d47360db8eb805ff519e4dea27. 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/SE5IB2100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde02603a774445b8864f5fc5736164472712bbb0cfd14d3ba2375f561566042. 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/SE5IB1600673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fb2bcc4a488d70b27d5a639d5314185d9191147732b426be8c778fcefd35dd. 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/SE5IB2100796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe261c29a5ea245196187a08b72020555db71e4617ed98223447b429707cbb681. 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/SE5IB1600675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9712de8ad2d96ab681d92901ff644be870aac8c5ffc11d45eb0689806fff07dc. 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/SE5IB1600678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14672100f36b92e9dc4e030571bd249a17679d35ff865746e6d660ddd7d2214b. 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/SE5IB2100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f589ab344cc4e697cc3f71d23fef0c4953cf8644f8629945294f978c2c459e6. 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/SE5IB1600676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba37ba67945d4f99b08afe34cf493e231803d79a88884e0a375e628d0421524. 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/SE5IB1600677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2146051b6b78d54e613caf89fe9856b2d8e03e37ee236a8a1d9adb3e2e8dfd. 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/SE5IB2100797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd81319fadfcf0b44c8586908dc26a57394c2d5448ffbf3b30ec1d28c6bbd00b. 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/UK9961829281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e34497e3fc809a83ce9ee70b6100dd27af717edf99a64454c91c4249044747. 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/UK9961816365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee55233fc265c6884f85d0cb70e7a485c66a91145ef1442ba3d694318968eb. 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/UK9961816366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a320ef7bff71aceb5e1fb0f5bc227516fea26b2c447bdf80290a627f5b6377. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK9961816367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c358f43699c866b748154c6b222d52dc120650862e2d3b2c35ba747749fa577. 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/UK9961816369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a0fc054ca301234c5e89b04aa1f0fefc8001a89806c1f9d34a3bc0709010a6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UK9961816357.
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 0x789cf09c4f6af1eacf9ffefbaabcb7701612c34083428ba565c735d8f5d5355f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UK9961810817.
Tranquil Lullabies: Box Fan's Melodic Slumber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d71a53a3728d753df4b8b32ad06b67c65c2281739bf8f3108b0e8e6aeabee12. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5IB2330667.
Box Fan Dreamscape: Serenades for Peaceful Rest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f4ba51549897ce96ad95ec73487f93ec38be23efaba985e258823f56c46c7. 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/SE5IB2330671.