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 0x8d4b24c72f9ac2f2e96bc7ca8b54cf6abe1ed30a075035d994b46ee4fe7d4ff6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/262da3e4-2ae9-4170-b286-b038a51f7d85.json and https://artists.proofprofile.net/proofs/artist/262da3e4-2ae9-4170-b286-b038a51f7d85.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 0x4f0c6f20192bae484976e8a86c707b85bb01951e1b271064449df87eb825f8e6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ITUM72301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9a8676e4e43e55a8be99774418fb541e637c8b55cef797491dce2254b1853. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITUM72401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdcff9e2e362a4e676745b65fd1ce9046c29f6bf074dcba8410914471b15486. 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/ITUM72401091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9a8676e4e43e55a8be99774418fb541e637c8b55cef797491dce2254b1853. 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/ITUM72401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4794f5b77fbac54e2eeefcba1593fc586bb02d92373d42528be170114dcc273. 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/ITUM72401099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd528b5584932b818ecf8236471bc379f49e58767a51903dd80442735428054eb. 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/ITUM72401093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa908f2c0637bc63933e97bd80bb106fe75d0a74c74c3ab95eaa959f3a1f98bd. 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/ITUM72401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97efe9a3c6fa178ceedb75f62e6deca41ac6491c07942fea6b432774ccb5d2b8. 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/ITUM72401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed706acff156eb2d390bb488308eab70921500fdae121fa0b2d6535b0c66a23. 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/ITUM72401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b49c3d2304bd302aa76122c5671e23363bd5ccf39aff80d8a3193a10d8308. 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/ITUM72401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c4f15ca54606f7dbf48a6f75c3f98ffc73105c29b0e83f22af6b5243894a92. 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/ITUM72401098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc997c147222bfba548c6492569a1d9117849137b6418edb238801be886865b21. 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/ITUM72400767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7591cbbeb8cf0356f672e7ab8cb085b45e849a74c1c9f4a2e77a41635a26f. 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/ITUM72400398.
Mattone (feat. Kuremino, Nerissima Serpe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3477db4e78deb9cf83665587dc2f6363e4348b5f57bd72234ea5feaa910aa7. 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/ITM382400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d50e70ac5c7bbfc0d804f1acbe67029ad7b7b5e8c5205ee36fb2a023312ef7. 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/ITUM72400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc46c39d9d19f5abd71db8a08e03637fad78e026e86f5e5a0ea32d99f9612af. 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/US38Y2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc46c39d9d19f5abd71db8a08e03637fad78e026e86f5e5a0ea32d99f9612af. 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/US38Y2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90098b03a53c71d50a14abfaae718e46973e1b965c39c763136246cafdda41. 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/US38Y2434764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2094e77df6133b96ff870967298251ca1d31e2d91d9386586a4d6897206312b. 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/ITNXV2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412eefd1fe6ca51dbe1af2835269be76055665f5d1de66e4d2966f391683eb66. 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/IT9VB2566664.