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 0xfdb887383bd4780581ce8d9a4145b8219baa1ba9201b2284a230bb1dfc6421b1. 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/f48941a6-1c7d-4260-80b4-617d40b0cbb3.json and https://artists.proofprofile.net/proofs/artist/f48941a6-1c7d-4260-80b4-617d40b0cbb3.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 0xa4f9ca5a7d3533cc70a86d7388eea11853ec1eaed3a8964012a92f9c930a5e57. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCJPJ1945381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5640650620da4f6ed927785edc24c27af8bde6677014b5d6eba469dbaabb482. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPT592010451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf41d66cb7be0a5d62830c387d2cab1dab4f5c6145f24cb14894567ec080f147. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPT592110073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102468df3c83595b755a2275f0e3093e62b8881c6e89fc5220384f7ca420dc3. 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/JPT592110075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f316d6c450eb6b03b77acdf8134a7a73d57f08447aa03884d428c6b3170023c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPJ902202740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b8c68ca7b3f7b97fed5e961e7751b83277a14a0d29b0ae617e8b7739e636f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPJ902206090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957be6a750e2c05a06a0568812d6072c3418c47f1f269b7a75c998a66ffc2d5b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPJ902202730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29db9af79f0cef1ab1911b4f126b0c2ac9e70f046d90cf516dbd19189e28db8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPJ902206110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f853abcce90eae1884872137f86594a1d61973f2b60c847f20f34efcec7ddf5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPJ902111610.
冷たい星空飛ぶ嗚呼今だけは永遠だ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44e0fe723cbf75c34b65d9f36d7557a9123f2f9b6472bd22497068bf4288b3d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPJ902206120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a272833d211318eeae47226cfd545e80fe424a078c194a7b46c01a5cf3bbec2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPJ902206130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b919607c302b2897ab23dc13b77de86555821c36aec2bb501c2e983b0abad. 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/JPJ902104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe16bb8b642af185bf01ad8341221ab4eceb1331167fe29a20fa6afc9b5bf7ec. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZQAY2212886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f33c4043a85f373d976701ab5c4d4076cb6affcda8acd114a1f2de850fd80ba. 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/JPJ902403140.