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 0x06c4b5e06d7cf84a2a4abf8608cbea79f8e58b6a80bd425cbfae04d586149b88. 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/5b6b9d2a-20f3-4fb7-9291-3ab191a11318.json and https://artists.proofprofile.net/proofs/artist/5b6b9d2a-20f3-4fb7-9291-3ab191a11318.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 0x0f563cfa71d4402939f07c977a29fb4feef4f0e8a249d600f90f7584aa9fa845. 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/ZA56E2306451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae99fbb3f522e3991db23dc04179358a07f4d88030da7dc87b8885a24977aa0c. 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/ZAMID2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2c18e91750dbcab55ef0c992e2c4aeebbab7177469ffd5cb749cf5ae3557f7. 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/ZA56E2415985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb9d99d160f654c9d61d1c0de697f6050814ed568f683a3b2c78f3ee20f8ce. 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/ZA56E2314894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3e3bc4c20ea49f6d6a50ff76367bdaea418e778afd13f8fba1cc306d00ce0. 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/ZA56E2302224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be736aa0ea95799a1aac6f164338f3d5e99e98c62ee17c98f8e321cc3bfa08. 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/ZA56E2304158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab2a94c1f405408489904459b294c6aba1777ece4e2ef66da43ccac5fa58bbf. 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/ZA56E2201774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4469896776c4349f8f063b3ac3fd490c45637877cdf5141f4f0af680d81a2b7. 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/ZA56E2201775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4dbbb7f50b0027b7d0df91256b67e1f60a3fba7b067b63e18ae50e28a8903. 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/ZA56E2304123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769c721a19b55b0d670127f9c82b6eb5ecb84cf675935d5e5842e33a403b3d1f. 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/ZA56E2415903.
Uthando (feat. Snesouls, Pellow & Casswell P)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f7725902a1ebf3d6c21c79bb4d07ac960ddc03b42ba0a35151c2944d38152. 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/ZB8CG2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3500bb7f42a1f47d0bbcb62156f557d09667ded16d61297810277d8e54f0b29. 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/ZA56E2416521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e82d76a70f616f3439835676d96e32ad0bc9d5e61174641ccf805a4d02902b6. 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/US23A1595062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc12ceed2cc64797d58c647c73196ef0614fe7642d84634212d69fee71ba25. 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/ZA56E2419757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c1485bd95f1966c07dc756880904f75e68088f29d033977110f0467e85d116. 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/ZA56E2416472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523dfb9bc10570cbd2e645b6fb5e889bd90c760890f24f2a1b42d124cbe0c9b5. 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/ZAT122300018.