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 0xd7f63f271c6f24d0fcc7f991de9ef0d0276604a31ddf43a5625f5e191c779168. 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/18fe87fd-2103-434f-ac00-cf42c313ee2a.json and https://artists.proofprofile.net/proofs/artist/18fe87fd-2103-434f-ac00-cf42c313ee2a.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 0x02a4d729a33c5330b69f5a3c19f1b85bb8ad65a116b422e380c8217bb57e07fd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITB841100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ee06471686a098b2b2aa941ec6cea61762b541f43787d7335146449b16d59. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITB841100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e5d361730c098663994c53bd074875ad89ba314dc0e929dc38012e4960caa2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ITB841100104.
Echoes of the Moon (The Best Of Native Melodies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bc8c36e3ed862b066e35e957f235c0181db1a910b7b8a64e69d4811f296ba9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITB841100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6e999a16933a4f3225ac17e54de2e6e3206ee53be5a2dec6d21b032d645f5. 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/ITB841100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825c6429aa69ddc5f38293c42e9156aed52b11f41a07a44f9e9d7a2c7adece86. 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/ITB841100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8536fd5b88785b5ad58917f7ea955565857b5dc579e4db56665ec830206362a1. 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/ITB841100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25caf191dc88965c539c342af7b38a2f168080423ad313594582873bacd45f8. 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/ITB841100125.
A New Land (Best Collection Of Relaxing Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6e999a16933a4f3225ac17e54de2e6e3206ee53be5a2dec6d21b032d645f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITB841100131.
The Path of Life (The Best Panflute Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6979c7329cb5e4e9fbb91e986cae9e561a34695293bce374909d25483fb29d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ITB841100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af11e76dfcac82bcbc17364805ebecdcc876162f90b0bf1cf40bf342fb16d9. 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/ITB841200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d05811369a58b453dea57f34b1d4e2e21e69ac8da295e72d1e0aeb9f2d7ea. 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/ITB841200097.