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 0x4b07a6b58d0a469138e7a1c64de8f2beee5cc6894ce34d5b1e7d24696870d2fc. 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/886b9028-8b1c-489d-8da4-fc4644ab14e7.json and https://artists.proofprofile.net/proofs/artist/886b9028-8b1c-489d-8da4-fc4644ab14e7.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 0x5239340b0a734d471c3d914fc45eedc2713f549e3fda83c1f81f507d3efd70ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:32Z), 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/TCJPB2400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccfe1613040344c9bf179583da87f2b4a1a5b6c88b24911542ea1de751b7956. 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/TCJPC2417804.
ホワイトテーゼを透かして (feat. 初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2470344b21f7d48c1401d0a946a4642bf3209b0602f3d6692b6429f6ddb5a13. 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/TCJPC2446299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97feda7da8b61ba54292bbd41285eb9fb685c8be1e13c8d5ad3953a7b7f85a30. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCJPD2585812.
Sorry it wasn't forever (feat. madoromi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471cbeda6a76c012a4a6ebd860ca3c333d0913489dac5bb0944a1c0bd8905b3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPE2506015.
えいえんじゃなくてゴ×ンネ (feat. 微睡み)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f3fb4bf952fcc24e003886bd4fda7165bd5e299adfb26f0727626b8538a44. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:29Z), 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/TCJPE2591354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4df7e8351e15e1b53a8cb7737827794fed9a4a36dc668187a265f04544a8b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPE2591356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d4a53c487dfc95c2f7b252e14c503e4052432c4b52918cd80a17a2f2c18c39. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:08Z), 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/TCJPF2570140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b93888e51e4166038974073cec0f4f7e31b0facfff852f04cae6fd28b6402. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPF2570138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201aa9f4d559052f35d9948d8355654c12c5645591a027172307a89748ed1bd. 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/TCJPF2570145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9537bed40e0fef439a6b728d00d5a86f65e2f27869f17c42532bfeb89d6744. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCJPF2570147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb947547eaa42b654b3cabd3f8ca86bcca371b5be69a4d17b7f6571b525bc6fd1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPJ2589598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd742e4ca3848b096f2aec6f9c483e5903957460b46f9b700f1430d34ad9234e2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPL2515709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc55dd3bab9031bd4285f83525387c1462c1b358bd6ae301a973b2151e3ac0c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT66J2568010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc55dd3bab9031bd4285f83525387c1462c1b358bd6ae301a973b2151e3ac0c. 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/QT66J2568010.