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 0xe727a746bfea32b9a164a7242a9c455c0d9e85e39b7c6f2d9ec7d122672a3ea9. 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/be199e2f-a6dd-4886-ab05-ac13ee3ae3d9.json and https://artists.proofprofile.net/proofs/artist/be199e2f-a6dd-4886-ab05-ac13ee3ae3d9.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 0x26bd4f70cf98c7f9b9a7dc54657f5f08ff8acd3b8aa74ee90e2f45a1e690dee8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:54:51Z), 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/JPCO07188250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0f76bff41e3c9cb5b8e32313b3550f2bd9ac0994ad29cfd5431fbc3081a65. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:29Z), 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/JPCO07474940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320399c0c488cdc073e30f047458ce4e1cdb036e6833f1d12e1c9ec0a783e57d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCO07474950.
那由佗現成 (なゆたげんじょう) -ジャズ・オーケストラのためのコンポジション-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8cc0a27d36e5ba1322b2da4ac50160340756d02dcf5ea33735bc74981cf215. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBRNP1400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f698266a697ec929d1d86d24e6d8c7c7394d411fc7343d3f90806eb625827. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBRNP1400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f1e923915a3c78647323acbd4ba369f8e3a99155a961d654ef09a169297588. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBRNP1400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb129f248ee2fb601f56d1daef33d1b643b73f60c087e0cc716575d3e5dd6a1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBRNP1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe483b397d0098b68d3bb9ab72cb8bce13e3aa134a598d89cc5b50ca0debe5688. 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/GBRNP1400113.
初音ミク Sings “手塚治虫と冨田勲の音楽を生演奏で”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ee7ffe83c6f263a4039ca51742cb7d5095665b402e3f61004338ccc6375f2c. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/GBRNP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9da676b7b1bf8ca10398064b5af79f44d2a790aafaa21c048d19001762cb707. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBRNP2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd235e077db3c739bb6481b771d1b39159fc9bb9367d18e86f67b21a5c6b6cff5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPSR09067749.
Liverpool International Festival of Psychedelia Presents PZYK Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521bf130d4e3a5eada596907ef94d572a0c63aaec5a893fe5e3b52f34bf912cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB9TP1500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f21404362e147635135ce4b7d8da11c7aa6996e6bd8912fa57d3924b30dbe4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPES09305040.
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