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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07db9480047fc3c3e59868d1ecde83c9118de6554a152d69c7006c4fee30f00f. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02476353-71bf-46f6-b297-493294be3a34.json and https://artists.proofprofile.net/proofs/artist/02476353-71bf-46f6-b297-493294be3a34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Leanin (feat. A3, Craig G & Esg) - Single
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db377b2a8a4f4431eaa226ccb81019d639820adc4e6a1dbd3c60fb2971ed7b7. 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/US3L30402522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a0d756f8d78a7bb4bb9c000a2d2f561aaab1103cf7a1db9ce85832dbdd4ee0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3L30402525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acfdec4ba172bd89e92a83cd466f8d2dc04595c6d0e3a59aa13cecbf520a24e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3L30402527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a3fa5d92d5a5d241369be065c2be50dd6c25fae6f3cb73f27ae7a1055737ee. 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/US3L30402534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb02c569c5d53167b85ab529f132dc80096a6737baf96264d2ced1b02fd1c6b9. 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/US3L30402536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883042e32a9a681fcc43b9b36195bbafb068a26fbf983e1d293144645301f55f. 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/US3L30402520.
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 0x70599851ff5923e0274dbed4c7f140be6fd95a0e79fe1eae535a3e94a76d85ea. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3L30402521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294de6e53d0be703e34cab118a478ca61f14b7d22cf457ec0661c1c2ef811c2. 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/US3L30402523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e976933e8d4bb5ac0f8eabe039cc070ad06b89aaa5293465e94ebee488d8982. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3L30402524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9287eea12bf86a4f177a300c0464537a6d0e7e3ee54dd0fe177f5860d6309c8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US3L30402529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a5807f77453d8bdb44190a3ec1df90ecd13d58aa0e0f98705fb28d2251861. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3L30402531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a113d13c0af25bc99efbc8d8bf61e7e4dc6e6742ba467ab021aa7944df86715. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US3L30402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e319d8ccb370e98eac2e7faa2caeadd9acd20dce14a59e2ecdf4dbddc86ac85. 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/US3L30402533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313730c02985524d232f47a360e6e4979ac171026a027f8c2385daba71115217. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US3L30402535.