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 0x1214f71dc8e6f9a73e7013365107aa0a8a8e2146c908f006badf473e412df0d8. 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/dce87567-108d-49f9-b994-c05b03ddb797.json and https://artists.proofprofile.net/proofs/artist/dce87567-108d-49f9-b994-c05b03ddb797.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 0xc7aa62063a679c7e2bd7a2148f617579704a1f756e8b4c40e7828b9445d63193. 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/QZNWW2472626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe428ddcbb03dbde3fd50ee7e19c3dda8bbd967a025a64642c7ab1d26ffa8bb9f. 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/QZK6Q2472729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec05e41fc5e00f2a884492721607a0122df18107e6871a4fc6d78585c12ea0. 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/QM8DG2223474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb702be08dbc0c7e0cd1871ce5146a269003d79d937e5b9a0008d56bca4f88d. 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/QM8DG2223472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19f4b07bce9c5e71d0fa45c4967f80a580b0316470170bb1b8ade3283db0e25. 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/QZTB32208049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce288c4c89e39771812e554859d7354719404866c1f540dbcf18a112bcfbe431. 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/QM8DG2223465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eef4790f3187d5b734b9141b1e5c18f972faed94fc29cdb2cdaa164adc98a24. 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/QM8DG2223467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347a5dced21d89a7d1edf65bf2613a94af1f3fbc2dd3bbb9632c8ee09742a66. 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/QZHN42277352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823f2c1a558439b2a34a10c888b26366b58f4226f96eeffdd0b6ab3897c54d04. 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/QZDA82289917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c294d1c85f1fe28c30fe3547ac061354430581c91c732d2917c790170edeb8. 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/QZJG52171085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3630a92e8291c4fb89bcc49480e643adc34d932c073801fe7ee5070164eb4dfe. 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/QM7282074105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8ddf304c22f69ce98a27705f144173c1173263480ca55e375fba32ea9f40b2. 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/NLT2H1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ebe3a29cd58290bf63c7230793a527cb5ef9e9a46d25c7f7a02470684fc222. 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/QZJG51919825.
Rolling Stone (John Skyfield & ConKi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb974222cc6a2ebad80783c560d9724f27d60a9be266583ad19d8b5bcb7c5f215. 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/NLT2H1900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7219250be24b1931a5ad9781c14d6f43defa4c43b5db807583509ede4b45e6. 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/QZDA81920006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac06c5a54954385cac8397d526a052e9337074e69a7c214dde56da516fc548. 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/QZ4JJ1804090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4cf321bfabba46c04d4c5ab0f8609b734343c8913b04c446bc53dc077824c2. 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/TCADY1875144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848a00beaa0efdf58d69663a66b5603b9a2ba9001fba2f4cf30538be3d3ce89a. 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/TCADX1870056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31f8f55936e56605c6c6b7f6822b5f1507380c4a16969b622758dbf457f8d36. 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/TCADL1896480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d43b86e215cf4edb53be205af256b37084eb5220e3cbe31baf623937a35b87e. 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/TCADI1726802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb513bc6718cfd0e000b4a6f16c70e978a21a37d79fcae851b18a8166a5e3b65. 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/TCADF1717993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0afd146d524b91b4c9de4061bf044cf917969940085560cc566cd5286e1a32. 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/TCACX1740933.
Let's Think (Thinking Out Loud / Let's Get It On)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec45486bdde55432aec487de8e5e29042a6c58c71c84de15d1a5312e7d04f2. 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/TCACJ1570680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5f237113afecb7bdc202e786c26471634ddea702df0658d30ad1d6acb799c. 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/TCACG1579715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab55464b9b2072e7f7a021b9d4ffdaf15fe3cf3162e67f0da97a8ed7c72f929. 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/NLT2H1900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d86fe6eb8dc50bfefde2fb71dcfaed4b78dbaf27c5e1ce9e8da4d5b4babee2. 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/NLT2H1900124.