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 0xfbefbd7d48e8eacd4f02626862c17fc5f763e6a87e24d6cbb9beddf23d9cdd1f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae9f06d6-3ec1-4b37-ac58-c36a06b200f6.json and https://artists.proofprofile.net/proofs/artist/ae9f06d6-3ec1-4b37-ac58-c36a06b200f6.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 0xed914224d2b31b83771757e1a64e8ac7fa4c5e0acb4499574286126c3b1c4e23. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DELJ81482599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639cebd45b55269cb2939b44c4d11751c84fecb28cf41b873affe137e17d1b13. 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/DELJ81809341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bc4bbab726184c59ae99d11b222d6e0d73de4fdc7ba8bda0e1be8cb5af6eea. 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/DELJ81515114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc765347ca948abb01095c97c4d1c7f1dbacffdac2f7e509f0027eafe58a95ba3. 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/DELJ81515120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b310c74bdda009f1feb3027267744f3fb6697196ad70652555b08fe4eaa83d. 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/DELJ81515136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7164cb762ae2f96265c96077d62b5ba4ef20eaa75d8ef3ec7481d19fcc3b94f. 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/DELJ81514584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86371b22301adfd82b604283bb9de8c8df64c4d241271dd3a82ecec37678fb2a. 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/DELJ81514591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273af84f5df51ddadc8267e6776b2998ebf670406652bdf5f30655ec73f372b. 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/DELJ81514592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb558d4254b4969823031853808f85fa262484f6e6293ce36f341f2b48d2e3a0b. 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/DGA0L2454701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea815fa3bd8818f1876fd7b78577f1fc34f28a03880c0fa59e39a52d36f98bc5. 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/DEZC62390195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd6d3eff53ca9f011dd7a679c5266af577e4b26e3dbbd51af5892a5793c5343. 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/DEZC62119156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057fb35932ea953338daaa7174ec10cd08e153b222f93fff893996148eba0ad. 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/DELJ81617736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f201a3354a065e24faca44f429ce4cc902a57e69284d1aa19fd301dc134720. 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/DELJ81617754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd910298f2b60a35f07f682776a18cb4d31b87a76a8de3bf0d76c449902658. 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/DELJ81749790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc5fe9fdfe62fa785abf1b61531e57103776b90e1b06cc333a6c214592b88fa. 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/DELJ81501945.