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 0x49ae45d2f9b7f7b9e2457dc309a9a8ce0040066ff290af5a2f628999a3613d53. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5147d7f6-0c4a-4bc1-a41b-a6ccf56c030c.json and https://artists.proofprofile.net/proofs/artist/5147d7f6-0c4a-4bc1-a41b-a6ccf56c030c.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 0x215e718c367c212f6e878ad6ae091623a15575975e0c164cd146ab7ee7b8a29f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/JPM792200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6fe859fb903cece23e0960cc5c1eda298b0a98d24a2fb8f736a3a24994b446. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPM792200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ae15b5a7991e8de2605e5dda41373896cae3f8f10ef9e6ed89b85794f561d5. 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/JPM792200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195e25ed375d7464142be5d64435c9f6ea179be781bb656d93cda0bc8ebe6e45. 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/JPM792200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4bf26f6ccae95be1b3f3b25f766384764f507af60ca3e70ff0a811ffa56139. 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/JPL542500511.
トレ・ユネールがあいまいになって
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4cb21f7f4d7fe3ba6147922a838a59afe6d6052538a73e88fa6f1ee332a437. 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/JPL542400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736882930614e115ccf002863a704782848f204cf7d3c5e69fd19d3446582bea. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPL542400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82f263d9e0c3b5562189465a6f3d6784dd75c3fd1e5f3940cad5ab921bb7dd9. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JP92N2339653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106315dd48e1d5fc30db0d5cc5da1d5fbe0383dedc45842899a2cd8b668fe06. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JP92N2339654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4faadf9fa44f354cf9aeeb6662edf5f309a8d466daa9f47169b38625860aea2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JP92N2339655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2c13a510c9350ca140684490e6a8e884f77c4fbad43c97c27bef83a5a0a43c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JP92N2232246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed9fee51f7d05de4317ad3a08866fbff419f03aa22122447d2a76dafdd8cac8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JP92N2232247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9900d62ee0fc86a1de0edf172b20ffd28d94657ba10ad4768982da6620e0b5e1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JP92N2232248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64436949f15293204ddeed230530a144970c45da7dda6b9bb94de5542de38f76. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JP92N2232249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb16f29a6c9e39e56fb1d1fb50fdaa16d496c65a8427f791206c78bda964f60. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JP92N2232250.