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 0x2b4c7bc751b4684c490b14929f1eb6ff23881a18bc22842b9f30c3a9b1cedf73. 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/913af446-d287-49f2-924a-d411723d0380.json and https://artists.proofprofile.net/proofs/artist/913af446-d287-49f2-924a-d411723d0380.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 0x98a897c4617305c2ef8887fa206288eaf0bebf0c2b86068f0040ce3d1aff12cc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/KRMIM2143321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ec81deb5d01e49a5101c0fe0440022a18330d72ce94f914c086c973cb9ea9. 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/KSA002200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dd17ce25ab3b5a8e16f5559ff3f8f72d9d5a017f53109d25ebde83d53304fd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KRZ291918889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee42ca3c9d332c258009d16030c191f2f2f26bc1f42ea89d80a67041a12358d. 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/QZF452002438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef30c99fac96924edb2454c24cafdc952a198be1753b22f6445c8ae9debd12. 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/QZF452002439.
BOKURANO ARCADIA(Feat.Maho of Adios audio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732fdd02f41c33e17b621401a82a1c6e79d21b7447e0f5bd5cdaefab4a290e8. 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/QZF452002440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38e77fd0908e4737da1a06b47c45521e2158c2afcdf5c7d6b77e65ba6364b5. 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/QZF452002441.
Pray On Sunday (Feat. Knave, D-HACK, GIST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f11aba773f3f742f3030f11cad7ba09e2a58d9afb37e5ee07c30f0920cd2afe. 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/QZEKE2024797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdafe48514caaab013622f9ebac34b9314cce76c5dc9f8f914c1a174be92b4c1. 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/QZEKE2013840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57c0cdbc53b32975ce18dcf7b5f55b3877f08b153218ad8e23a8a2e1acde41d. 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/QZEKE2016628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91963ad6250a1c366634586dce63e851c0f1c71273cf2ffb797a6779ef640242. 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/QZEKE2016629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693e305227e228a1b051e281283b2ac7500d24110945e250e84ee43ef48c3c5. 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/QZEKE2016630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe831e0f845c56ddc26ccf7a7a0c998e2b64ca511dadc82c2286ebf6e1c974380. 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/QZEKE2016631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2f07202ccfbbaad6bf33fbd21f841604cff9808d748483c74fa31627b21b79. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZEKE2016632.
UNDER THE SEKAI (Feat. Yung Wave, Jayci Yucca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f7aba30c7e68759a691570d08fb243df855730bcb3f58367778059e3c4d65. 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/QZEKE2016633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93591e54e0ccd59167aa644c858a49c92f526dd146fd3b6fe6819a21dbc71812. 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/QZEKE2016634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2666dd5239a796e1d2278fa037d88b6cd07722bec4691403397beebab0024266. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZEKE2016635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f4f8f54c38357253b3294eaed412f33e12ae016edd969e60159804166c997a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZEKE2016636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3c1b7116206e266eba7471373b54e53021922b89b2e8bfb170e843112c7fe. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/KRZ291835069.