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 0xa8d8971bb57d59ea145a957e4133734fa878bf6080023befb6753989375285e8. 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/9137ad5b-e643-4d19-be47-342a816d3aba.json and https://artists.proofprofile.net/proofs/artist/9137ad5b-e643-4d19-be47-342a816d3aba.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 0xb5aae5e61b7928be18e123bc82a1af5fb245e02dbdb8461f9a836680719edd98. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P1311493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e450344ae37672ecc3c161cded82393c4cf6564ce6a5f3172419c0f611e564. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P1311495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf198da7855c74fccb8cf91a9858a64ff0d6b316194f260d1be27bd614f7296. 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/USA2P1311496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0f48ee3d0e1efbe47afc8f096302f19a1166c7b4f81e785324f2c0fe4d6ff9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USA2P2231706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027626f8ee3f773fac4aca2a3dc93fdd8d1920b4fdc53fe45cfa93b7e6d4153. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P1314647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f73000086e8c4c2017800c5776038859fa433b44e3899acd38ded8d339d326c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USQY51352019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377b87bffebfbc56e5b373008986e852f3fb0e1f4e27aafa541dafcab0c42e5f. 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/USQY51352020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e122cd1ee9a27994ef7cacbd11b91890e2f465f9076e83345cc74abc06e89f4. 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/USQY51352026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35cdb85e42b70811343d2099e303a01b738e6881b2ec2e82b654856b02f588. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P1271062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c80e777393c7f50cfcd36921a7d652ac416e3c37a05dd163798ce21360fb0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA2P1520734.
Klassik Lounge Nightflight, Vol. 5 (Compiled by Dj Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca274328853ddd2bb8397793e306e3218acdedc3c1f1ebb031ab9f5b2e16e8a. 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/DEBG61201652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b970234b06b7e5751b02b97c534b2d632cf17bbe3f95393b11f2db392227a83. 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/ES8741511107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a52c74b13a98502ac6017c180e4ec44a0a18350663c76760d97be9fe37d72b. 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/ES8741402105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8fc0055fe10a29ddef3641cece9719c9db9d9ccab3abf7817434f01b8811eb. 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/USA2P1311501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef77d95d80aaecea24a643898fbce95277d51e43f8b8af73248b965cf90b01d. 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/ES8741610111.
Klassik Lounge Nightflight, Vol. 4 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a97c9e438bb19d5a745cbe5488509e925a061ffa5a9854ca64176eefef40a4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEBG61101240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236212beb23d5810151766dd0a7e6852ad14136ac701ee0e5a5031eb10c41a5e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES8741603107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9cf47926b4c261a49b642fabe8307ed9eda8b4f10b7822b900a1d14fef31e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2311987.