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 0x4384abfc39190cd6d7f91f5afba4e7a3add1c7d154d997715a2ee5230bbee5a1. 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/ISV442463601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff4382b5fe6213aff4c42a7272a094fa7f6d6e8ee49466e2d56a1bcbc12ec0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ISV982574501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871f5048fe1eab52ec1bab669689014cb10c217d663c5a6d18ecd5ec96810194. 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/ISV982574502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed30193b5728bde7e4c1080aab3eafda980f397603bc42a7468f3dce12ea6f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ISV982574503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d261821893a6f38104d2bbba5b56bb3fab84c0e7e2ef7b4018cedb5c9a9080. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ISV982574504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fc7286e0408f3ce1ef0cd01f2ca762c542ffb9b2250348b27f51a5fa534a73. 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/ISV982574505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ffc52332dc13c9caf726e972923a6eb4e77298eee66408a56bb6163f2cf60. 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/ISV982574506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92f90dd24cba1498cf7eb3f633e06b45a3670eabf57139acc97c4a9983f074. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ISV982574507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00879f3412cfc9f7fafb5b8c7b8535c745229e444b1a73da7deff3e0e081524. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ISV982574508.