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 0xd923279f15154e404ed114a15cbb79505071817609d9ba2b2d491db9d5b57ddd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/990a3bbd-be9c-4826-a7f3-905c83933672.json and https://artists.proofprofile.net/proofs/artist/990a3bbd-be9c-4826-a7f3-905c83933672.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La traviata / Act 1: È strano! È strano!
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 0xe37f567f49dfdb4c8c87b4528c933e3c19d2266873745fe053d093da06e343f8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962031109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965422339e03ebb8c0bfbf0c3f5cfa2df217bc5e4dd128f905cb529c5e3a3b9e. 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/DEN962031110.
La traviata / Act 1: Follie! Delirio vano è questo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb3ff9c7ca0a7560af878a98e316e67edd9766b232c8a53a9d688d88f8fbd29. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962031115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe045d0fc388b0e9650144c364b3fec01f29e62e96d1304e4d9c12e29ed573592. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN962031111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b3cbc5c89390ae9d2ae3465e8289d87abcf99691d7aa956d8ce2ac51a9c938. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962031113.
Lucia di Lammermoor / Act 1: Regnava nel silenzio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d1f490c4349a916bf500d9003f5b4cdac1ca619fa56e812f5d46733784ea7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962031105.
Lucia di Lammermoor / Act 3: Ardon gl’incensi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8bba85d1e69530107e1d94d6ead4017b57de55e35d6062d132b67b8c52f819. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN962031118.
Lucia di Lammermoor / Act 3: Spargi d'amaro pianto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e5fb83f7b83760af3200d7c423b0622c1907b93d692d79d3946205f2f472ae. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN962031108.
Roméo et Juliette, CG 9 / Act 1: Ah, je veux vivre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a026baddbd85282a4b217233e0fd73d4258bb191c1ba8e77ce658eaff163f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEN962031101.
Roméo et Juliette, CG 9 / Act 4: Dieu! Quel frisson court dans mes veines?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc292374ba3bc8a5ffdd43b4dd76a1dc9387b9699901e63b8e57b7f7eab619. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962031102.
Roméo et Juliette, CG 9 / Act 4: Amour, ranime mon courage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7e3ffec4098f2298678a1f2368698b6dc1585982b7ec730add6b747c7936b. 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/DEN962031103.
Gounod: Roméo et Juliette, CG 9 / Act 1: Ah, je veux vivre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a026baddbd85282a4b217233e0fd73d4258bb191c1ba8e77ce658eaff163f. 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/DEN962031101.
Lucia di Lammermoor / Act 3: O giusto cielo! ... Il dolce suono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e3040f376a26cf4e446701ff88c0191e64785d2eebdf1e24baf3e287c8809. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEN962031107.
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
La traviata / Act 3: Teneste la promessa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85527f3ddd681086ba8567cab1c7db06ac25f82ad4bc534abf58a73c02126724. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEN962031112.
Lucia di Lammermoor / Act 1: Introduzione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be60e8657e93fd152aef3049637cb98bdee54c86a89514ba88e6feab63f8d5b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEN962031116.
Lucia di Lammermoor / Act 1: Ancor non giunse!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5a498e59e1548dec734d350a08444d8184cc55aa82bfd10568bca8cb02c67. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN962031104.
Lucia di Lammermoor / Act 1: Quando rapito in estasi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1351778afbc2bae88537188c581c1a8c6f3b13f7e37c4c17eb09cfebed9cd4f4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEN962031106.
Lucia di Lammermoor / Act 3: Ohimè! Sorge il tremendo fantasma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3490079be7f2bd7751ed5e0782b073d41ec6ac567afbf7ddd1807884b5dff4be. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN962031117.