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 0xf1c6afd2e98f2354ef2e8507fd810e27475f0ddf8f905a66f7a42650593794df. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67150435-70d1-4c73-925e-d834403e1aa4.json and https://artists.proofprofile.net/proofs/artist/67150435-70d1-4c73-925e-d834403e1aa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
MoBlack Records presents: Afro House Collection (5 Years Label Anniversary Compilation)
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 0x234955805b68026b768e3548c58a33315de0ed67ead89fbe3ee4005e5475c355. 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/IT2GN2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035f8bd6418516278884306fb54505a407bf4eaafd5e96ce459d38ed72329784. 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/NLRD52200716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bca7f90be868f174a9ddb13dee09c3122474a66ffeffcc978e58802999cd64e. 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/DEEC32000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ff3aa18fc94ca495b82c75ec7acdc44926a0136ddc6e09c90c9aff14fb6993. 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/DEEC31810133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011cc58c79238757bfad3e0ad671ae5b90d3badf975b55df8df6e8d2a03b825. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEEC31810134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dedc80a67f8cef9944907fe68c9be4f57ca5a384f8b786500bf0f2fbeab407e. 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/DEEC31810136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3007472260c3fcffb94bd6f7ce1b7ec138b05f63a0a403042cb0cd6cf90a96. 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/DEEC31810141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068b87903799234dcedf3018b5acce66f8f7cca55e5d3e77645e66c818a8b5d. 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/DEEC31810142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f935015234ae87d4956ad0a82771582ce6bac6c64db68bfa534fda5fcea9fe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEEC31810143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb50d77a968cbdb52ccc73400a3aa577834203bc99cfd4dc2db65f3293cc3b. 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/DEY472083160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7506609ec1aa1e200de91c53202b6d9c22f306afed1b6bf855a76437a89e92. 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/DEY472083167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa204aaae773cd4d5a01cd0550996017c26f67e248b6502ef0ed285735cc5cf4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEY472083169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879fa16a46886ccc9ef8e4dbf221a65e7a1e07f80d08fc2c28915e8e88ae0b0c. 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/DEY472083172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8229d00f886b3de41237a808505e37577dafcf10efc9107195c64f5651b01. 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/DEY472083175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c547c12579ed4fecb9186a0097677fcc8febc1edf3d16594733306599cb82f7. 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/ITSDR2200341.