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 0xf0d191a864ebbd5201a8a822a36643dd84395d0c0ad48e37ff3198de8471e9ab. 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/a7b48435-2948-40dd-ac5c-08d876b1aa05.json and https://artists.proofprofile.net/proofs/artist/a7b48435-2948-40dd-ac5c-08d876b1aa05.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 0xdebc9b64f4548d72d8a6d3970aa3e3281ace5e0fb244503da43d02b7172ce4c1. 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/QM6N22474481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c7bd2e04c9ac631eee20bde572ecf9d0c10dd83578196fee75554341f6dcb8. 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/QM6N22474472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a0cc2034cd34adfa65613e51b8a0f7d9303c2806faa2eceb924a7c4245b53. 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/QZES92418784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a2b5ded220fd0b9729ba67749f33cbfa6e1f71a0ffe38cd0f430ad7204949. 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/DGA0M2372480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e6604ce2bf1768e7c9af6156c67f8776d245e4d2c68d1b85449607515e1175. 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/DGA0M2372481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1671678970fab365398d676983b6b49e3a5701a245093b513205aeb0c226b. 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/DGA0M2372482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377beb8c868dfbb224df5ea4db87032537a5a51f11db7974fb17f68af9db37c8. 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/FRX282261479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c5f254db38a456495b3288dfbf1e41741ee1bf4a552d499284da53dd208a20. 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/DGA0M2372483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a9f1b53cdf419425e716c9e71785acb0c27f26698d7f9e4c053fa4bd0a904. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:42Z), 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/QZTB72246622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69674130e77342e07e40bbcd4bbc717323076d7870c026797d051bf2cb31d03. 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/QZTB72246623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85e59f50c4fececd2f731061416a953a3e3b3c9efa6dd831ef1d07e0f4e47d. 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/QZTB72246624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18765f3b33cdb0eb857d0abcd1ada117ed45c328e1fd945b20b266adb53a9a72. 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/QZTB72246625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa8ac79e1786ae95f2d5b51a7ffa7be3bd80cd95178e974f74f7f165eef4daf. 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/QZTB72246626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b34b9ca2b62e2989800c1142ff61e1b8101cce3298541a615fa2465bdaa51de. 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/INUM72400674.
Heavy (feat. Boyblanck, BBB & Urban Poet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d0ebc9abb88d70c6bf8c8c3febbcf75fb76cedb44e71f0b95b0359178e49c1. 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/USA2P2438586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a4cc6084a03eeb8a1f4bfa8aa4ec094f36a1e1a81ba3245cfbe74580a8ae9. 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/FRX282435759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43359940ea94ed96018bdd6961125087cc0a6f59c68c998d7bcb0c202d01ce96. 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/FRX762313588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c379973a1aa9790edc5281758572db7d6451dd293c14ba798c400b88b64386. 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/FRX202338121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef2ce971301f13041e9126c99d5685b5e983d50ef91aef21084d685576f61d. 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/QMDA62202284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377beb8c868dfbb224df5ea4db87032537a5a51f11db7974fb17f68af9db37c8. 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/FRX282261479.