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 0x807d2587ccdeae5cccdb2116f15ce1f248b1c6193f336816cdd67036b66b2534. 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/c349debf-b0d3-4f67-a09c-8cfb9e9ff4e6.json and https://artists.proofprofile.net/proofs/artist/c349debf-b0d3-4f67-a09c-8cfb9e9ff4e6.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 0x50c690e7354da752b19299d49b8a514d8b4d7ad926326bceec79cb6ea384a1ae. 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/TCAHK2341865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683ee360fbb0256a1b71d0967542dc02f869c8918cc9565a0b3660bd810bd537. 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/TCAHK2341875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee70e204e5bc58954c4c5f96a5d0d9abf4b4a7c22d04df9f11d1f5046c7cd4b4. 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/TCAHK2341878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc755a8b959d31e5bb0a2936861d70162548526a87aa47a22e8924d52e1e0052b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAHK2341881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9299578e18ddfd202be256889329b4ca1b43a2d1ae75b7f54552ba88f0695cf. 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/TCAHK2341885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64452bc23a7d2cb0ca429350104a937ec58b9715130745f303343a43c324c94. 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/TCAHK2341888.
Common Cents 2 DJ Blurray Outro ( Slowed & Chopped )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad9c2f81dc5d83ca9670523184475103f964f73f20823bc9d5fe5ec9c3869b0. 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/TCAHK2342171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4186c41ce17d853d152d975c12e44023444c1bcfa44fabccfae6755ce53e0570. 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/QM6N22454678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db9b9eaaac15d61c4605de327545f00316d88e84d9177dbbc23a3788b6b4a5a. 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/TCAHG2377665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1d62f74beee29f4535fc9446b324ada56f6c634275b9ebb213504d488f947a. 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/TCAHH2378640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073207a977f5063e6d4e28a22a3e05410b6a5dcd1e997617e11fd4dd9cdeb8c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAHL2331170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8d4b801ea12c20d0fd9f57bc6ebbeaaa6d5ddff80453cc59c338f8108815a6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCAHL2331184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5ba971532bba37578581863ccadbaa93bb102dfc2595fb914f3f6ba817772. 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/TCAHL2331195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecd8ce18d4665ba41650bfd64d55d2b5b8ebb2babf4fc698968b3179cd01fa2. 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/TCAHL2331211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bdec8f21164be8619d4c92d35cb5a6f5a1e5f45303b75042ea0003391c1e8b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHL2331227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360599209d470d76215810d8394f05b04143bd57e8bef681a3532e02e18882ef. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCAHL2331272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dee542985f9f7a06f3998f78e018762ae0bf104000b12c1aed0e5e7ad5cba9. 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/TCAHQ2389596.