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 0x85b448dc3e919c2fa40a2ce943684c77d91c23122cee31c6312f1fb214d89d8c. 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/b321c29a-14c0-4a7e-9318-407d9f3c4e16.json and https://artists.proofprofile.net/proofs/artist/b321c29a-14c0-4a7e-9318-407d9f3c4e16.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 0x0e429d1018e56d515d9a4c66f70d53581fd40f18463426b08a0de436f3a7ef51. 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/ITDF62277086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf938cad1bd7b323515a253bc621f4929f2ecf1569e9c89c2eb47e583312d6. 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/ITDF62277087.
MACCHINE (feat. Nicola Siciliano, Bresh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dfaf642854f9db041a2e2334a8b931499499e863c3160e5a47fb9a556f4072. 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/ITDF62277088.
MONOPOLIO (feat. Kid Yugi, Nerissima Serpe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851ed69e8d94b6201b4b8cd10fd0058de714638ae1ed147d7dc61e6c7b18a1f. 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/ITDF62277089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9d227c186fb7693cb7d09c2ce19a977c03e61e2084717982ef1c57f48002e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITDF62277090.
BENJAMINS (feat. MV Killa, Yung Snapp, Lele Blade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd9ce0863d00e1539d8420183442a17ab6ae676cdaa4b02b057f5403c3d3c5. 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/ITDF62277091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af37972f40d677255f43b83ab920e8e8de3c4967ad37c1f1fa2b0ba89f27b69. 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/ITDF62277092.
DJUNGLE (feat. Marracash, Taxi B & Paky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf182ac5f7838d73d382cc0045d5a92bc6073bd7e18a942e1e98cc736a0f6cc8. 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/ITDF62177029.
NADA (feat. Guè, Capo Plaza & Pablo Chill-E)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603d49f1dd8195ef6bad64594b67748694185538052a3f02d9336b01828f8791. 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/ITDF62177030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf3c133a590bda5ec5c2fa4180367550c001761ac32ebf6f93d676df03142b. 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/ITDF62177031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd466697bc95c4885a23cef4f87d1ce8fe0dda167d455bded948fe8a61142001f. 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/ITDF62177032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1faa4aec67dd46abdeb77301b5606b8e59e0cbd7bb7d84c14dcae4daf1b5f. 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/ITDF62177033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b41f27ab1e8cd74673c16d372a94429a6b97876ff3431ff4a4da2d85320b8. 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/ITDF62177034.
LATTINA (feat. Ketama 126 & Pretty Solero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9928373578615ff83cea9e223c1578f7269971cffb14c0243c3380b1b76477d0. 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/ITDF62177035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49795787fe48f5bf88d1b535009536bcc3a84568d9f720ab5411902bf956f3fa. 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/ITDF62177037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa6b37c126736fd1c0815054e4c8e2c01370cba43fce08ac551aa424038b66. 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/ITDF62177038.
NOVANTA (feat. Samurai Jay & Jake La Furia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a81554485e6419f63bfe91e04e98f503194594c235dfffddaeb916b5facf7. 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/ITDF62177039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e92dab757c0b88ab3a67c186bb7cf231c8a3a40dc850e5255cae0bc6aa00fd7. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ITDF62177040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b410f6c0fad6ef32c38fe28a81fbf5ed188f9d6761af85c5a7d31149844aa4. 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/ITDF62177041.
C'EST LA VIE (feat. Dosseh & Capo Plaza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcd5c070dc284f4c74cd831a1b8728f9411c3cf3cf294c7765ab43c84b9ec86. 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/ITDF61977099.
SCIACALLI (feat. Noyz Narcos & Speranza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20839b1ec66557e46eedac1808776cd2a26967177e7a2d13705ddef00d670827. 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/ITDF61977117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0324c7530f31049fac1a957811de1e24a637f9028831198a4d55b2c292c0185. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITO4J2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1412e0e27943048557e7b4fecacd6d62c9707447e47f148f81b2e53c7ee2d7f3. 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/ITO4J2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff941d5a7856f51192e134179b046dde04e8cb0217523e0a722300c4dc30e9c. 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/ITO4J2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca012af39b44587d26a56dd176106942df9818423273a8ae5ecbf4243385f6. 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/ITO4J2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876182d453d1acf5d58f83531ebd2e2fb18c7a92453d80c2f632c5cf27dbb329. 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/ITO4J2100018.