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 0x9141a38cc2183dd3e336004a8209e8d1a3777b24521569091ca0512f6499f76c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0cfead9-0c66-4b50-9c52-1917c820c5cd.json and https://artists.proofprofile.net/proofs/artist/b0cfead9-0c66-4b50-9c52-1917c820c5cd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea44b173d63fa1caf61950b8e09717db19dc938be4320e93e99717694d68b497. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKE059013102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952d28d54e62f4e7ea79a958738b62adbc203c8c094820fa571a776b635bfaf. 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/HKE058713206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e364fb35e97e940c52e327a38703c269bc4dea1d3b5ed4df8d43902012b41f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKE051100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de8dedd4f0f9b16d5d69662b3fed94889b07afac822c3554405b3d2b9574bf. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/HKE051100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c07aa1e8dc139e2a66db5ff08ad0abf66cfddf04ec962f686b62bf8429a4933. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE051100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad359b451457d1e47d2e9282c2b9915c7379ea389f8761596145e31994f6b32. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKE059013106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38591576c8450fd9f14fed9f5fcd176c272b1e476c523d1b77cd457495d8ba5. 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/HKE051100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77174901d5d2e829958116fe15305d622cf16bad79b89ab4ec0ef4a8c78e8d5f. 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/HKE058713107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9257304ffa0f2ce3f98b36a585d85626480dbf69459dee1a27bd1d1f2bf771. 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/HKE051200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8b5408adda6821f8dbd881fd1a724205fead7f5b814ab6d386843a9b706156. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:18Z), 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/HKE051300157.
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 0x3ffd4bd0902253363d3d2fdcbd8b49bb0955b2ab2c3a7e603b7c5917f0e0ae3d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKE051100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b43bf0d93dd9448797331afc36d6d85b1fa26ddabb7336752b8edff0b87e809. 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/HKE051100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f4a5a7c18ba1fca7d26afccc62e99fd3e90ff7f2460cc79868e8a95b30ed2. 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/HKE051200249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a84805aa5f623f34870c8cbf5430b3265607398cf0e6bede17918f5e62175c5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HKE051200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5495562ae7364fbac40d5f8dc4e3e823199145fcd77618ee3ba710daa5b54ef4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/HKE051200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb209b2e6a212aa8783f9011cec6ab19e6ca2d69879c50594a2364e1e75360d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKE051200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eabaad2e3f7fbf01a83d4c34b5090f1b9ed54314ecb12bfe77ff28ac85eb67c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKE051100242.