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 0x57c3d49f2dc9f788d5fa4002842ada99c20d30d05125d28f70d75e8eead65a14. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9879094d-96c1-4aba-96e5-f6d8fc550622.json and https://artists.proofprofile.net/proofs/artist/9879094d-96c1-4aba-96e5-f6d8fc550622.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Manon Lescaut / Act 1: "Ave, sera gentile"
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 0x1f1916f001bf4db3ddd2f7e8432d7cdb1056df6a04b1bfb88d01fe6c9349d04e. 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/ITZ041400044.
Manon Lescaut / Act 1: "L'amor?! L'amor?!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a18ee6ce9d92a7f6d9708ef4580f15da40355ac757df0098bac680da5e5342. 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/ITZ041400045.
Manon Lescaut / Act 1: "Cavalli pronti avete?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f35b8451a2665c37ed7ac3143f720b9cd487bd45d6c6e566d65aa1f2eaf2c4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITZ041400055.
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 0x77bf008dcd867743035705009148a3ccd5cdbc0990434d539aa9ffd039acbf26. 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/ITZ041500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b3614c8bb5788843108991c94a21e1931bd4be17b68e21ccf05f1ae412d39. 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/ITZ041400090.
Turandot / Act 2: Tre enigmi m'hai proposto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3550794e3ded3602361d48f275cec3b49249491d4f86207a91f2da5b9765c997. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITZ041500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30f690ee1ea236a3054b0e3bea6c8884c0368606e925281bf475284a765e5de. 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/ITZ041500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf836c1969ab2172333001cef2bf5ee9c60024ab786a717af99dbb5ab5f66ca60. 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/ITZ041500031.
Turandot / Act 1: O giovinetto! Grazia, grazia!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5d5d56e154088ff941baf2ee0df2c59c782245bf7d029a5ffd92ba67dc9469. 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/ITZ041500027.
Turandot / Act 3: Diecimilia anni al nostro Imperatore!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b57bd7efbee26ff8183c9274d440348e3666239c850191de00dfd1acb2653. 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/ITZ041500052.
Turandot / Act 2: Gravi, enormi ed impotenti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8116bb10176aba58b5af70cd8928e071d429f9a9a6251da77b554231451f0ca. 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/ITZ041500036.
Turandot / Act 2: Un giuramento atroce mi costringe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbdd1c1f89fd8dedec4da67a787a38797acfc93c28ebdbc6095a8d5ef90b3b1. 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/ITZ041500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3652b755aac8b328187575f87f19c0248beebe3b0faa9c6d25896d74db1d2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ITZ041500025.
Turandot / Act 1: Fermo! Che fai? T'arresta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6809db83808186ed1c922ddfa17b3dc8a6acf4a63024ae8569913e944c7762. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITZ041500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1844bfe5798c51d34e7040d00123a66760fb09d3269db487b8c733307a54c8dd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ITZ041500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c67fcd2fd7e9d4731e1307e07985a69ace237c19fbe6960189d448939a5f7f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITZ041500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c7ce6f84f96b7b9506c9e9620d39c4ee76c7b84e16e9df754c7dd1545bcad4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ITZ041500039.
Turandot / Act 3: Introduzione - Così comanda Turandot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41057949552dd323740edbce7e71e157a339f59ddff83fa702b6f2861a107d74. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITZ041500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3173d75791c0a0710def80dd0777f8e3ef5508f728facce96ec9a81b28fd5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITZ041500045.
Turandot / Act 3: Tu che di gel sei cinta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0015ab43388ecc21a1c0e43a8b1f186155f3f8bc21d6e7ce1158e8711b794476. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITZ041500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7450fc57b5c56df1ea03ab8d405e9c6c4f5712190ee5f23e435bbc19dc84064. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITZ041500040.
Turandot / Act 2: Gloria, gloria, o vincitore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d51c14155861937faeeacd9d4f13770c166718b9599a872f92babc3420f40. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ITZ041500041.
Turandot / Act 3: Liù! Liù! Sorgi! Sorgi!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7635fc43ef4768e61055dd446fa420907c8f3c13f991f52eb18392e76c2250c9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITZ041500047.