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 0x9c01b93d04a8d97e2c12dcf80b6c815796e33414c8e89118d38db5a3f3d0aa7a. 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/b44cf54a-f716-40cb-95f8-0bd54d5016ea.json and https://artists.proofprofile.net/proofs/artist/b44cf54a-f716-40cb-95f8-0bd54d5016ea.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 0x270c42ef43e5792c410c08fa7f3a86e443ae039236720e497be816296d3c9c41. 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/USNA19012403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1a267eca5db8e8fa0f51f5fb8612b8a981fe19cae1d6189b5fdde6335922c5. 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/USNA19012405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf43d2fc7f7cd55a5959fe527899f642ca0eb0aa2fda5ce1b502af00b1be9b91. 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/USNA19012407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e40962a944a34e7697ba82ebbdde574f0410080bf4ccab40092e8e6ad97cb. 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/USNA19012411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9139c63a7270fd9fb25549baa2cdcd4c3266a837b9e99863de6bf1c2793b7ddc. 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/USNA19012414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc60325541f4fb833e93e62b9a29e42f7c24ad55f7a86360b12f89723c9af0e. 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/USNA19012417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd651a742286c144932b26c16632164befc65b4570096ce6e7c6e22afc0f3c4c. 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/USNA18813563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e828f0c9c5c8f0ba9afb4e7bb974e731de5d4386b06dc7472dfc13b5e93853. 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/USNA19512315.
Christmas Blessings (The Narada Christmas Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c138d39aa51e0065711d65ada29b91997992abfdcb0ff9f3f6afad0e2b8342. 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/USHM91970070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24def66f0bbbc172cfe0ab11cdb7fca4d1f36e59c21c129c8d159f1fedd35c23. 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/USNA19514404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc5bfa26ac02e508fc6aa895eac0187493b133db5cbcfc089ced2c6dff949a. 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/USNA18514462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df1b2f970f87475ff8d3af9a242feeab66a49d910c44d2fae07e57dbafb6e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USNA18514464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e57a83c92e3067d75d2ad793893392af93d903253dba81beda991615fad353. 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/USNA18514465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074087b81cd8c9d8dc43b0b56cf61747a7877ad609211453b69533fe122a5c63. 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/USNA18514471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177d9996469452ef76edf889e9b79fe09b57f6af70d47f7e618e89af3ca8dd09. 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/USNA18914482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe604f26059c42e75ffd3811b5cb8b0ac0a579dd98c59127a61667a4c93f36ff8. 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/USNA18914483.