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 0x2de431022aeb07587ce7e0e16b5efdf5fbcd46c121e294d18b82cd0215be16a4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a095c16a-ae38-4fde-aedc-2b5ffb279039.json and https://artists.proofprofile.net/proofs/artist/a095c16a-ae38-4fde-aedc-2b5ffb279039.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 0xe5fb919b38cce6d821a4c6281d6347fd419cb4527bad6d533d03f84a8cec2f7e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPJ901908980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82c12f843f55b6b0061d3c6be51756922805468499c97e7c3215766f40497d. 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/JPJ901909000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ffc4e6df83596b3d5db8061826fce57b3d93e5cc30a5ad7469b70f5c8262ab. 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/JPJ901909010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec15effaf2d07304a5f565a2593d8d0e436807729ecfed0ef1c7e0f593ac3f0. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/JPJ901909020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc849dac14687fc1f25718cdb0d4e9f162c23c9a780f07169f1c020e771558e. 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/JPJ901909030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68b16172b09a7e86bc546f49bd8fb529041db172a1ecc8d3024ec19a8cedf55. 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/JPJ901909040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2cfe8b51f4d8c17c9e76f9461672c4783c4e6c7c114b6d3721ab6b3902b2fd. 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/JPJ901909050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fcfa77664fbc1887f6ee27e36f353d160f559b210ddf6ab6ab4d9bafb59713. 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/JPJ901909060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742510bdb24b96757fd3d056986a02002b62d8163f20e1fb182127ea71584f86. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPJ901909070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df4731a5fa5f8382add4cbddf409181a00d03ad9f288b83d83e1b8efd36c00. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPJ901909080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d2cc97cd336ecc808a9d4f8e3b0f82ca11a5bc74551598a17df82fcd6db87. 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/JPJ901909090.
六角精児と下田逸郎の坊津コンサート 2018年8月26日
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97b88eb780fea64cd054c22d575ddd52d27526fe13c1dad6e8ae1bc49bb648. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPJ902005210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa685c3e4b55f638067b9dc38feb05727a25e28a6603e79fecc0a7781a5ba9f1c. 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/JPJ902005220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e4ff14abc779a70b890a7b44818dcd873b5e5f5f56a8496abc2e223502ce3d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPJ902005230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6895846c4cf05f11b803680e7fcfa5d3cb15497faa08ca18b0cdd433ca2443a0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPJ902005240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6797356c7c1331d75ce58b8cfe0bc2916850ec3d00a7584a5c72056334fff0b. 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/JPJ902005250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6cbee809dc2a822c9ce060830323096e16bede29e6eb312a385121d9327910. 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/JPJ902005260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9689d41de82c49f8f82f827bd3e005c09281ac1ccaf7d03705bbdc9339e879. 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/JPJ902005270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d966f194d3d5cebffc8158d77759165ef716def24bbcb618560f1f375c45f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/JPJ902005280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af96c3a37fcadeacb5717882042bb84812adc1fdec7daaa7d93179e4a55d5a2. 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/JPJ902005290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be0aad624faf2a90ff8747fec31cb47ef7371c44296892801837d82c8a293c9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPJ902005300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f2486c343f049f0418426cfe0df5d1c8ae620d0ae2032e192483f0966d040. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPJ902005310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5675318a9924443f7729d4c2e5add3fa45d65ab6e5a304d543d45b3d1091911. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPJ902005320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d770d51b140ea5c7d20adcf01de98fcb2255cfa1ef78f33739a6d34a298e810. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPV502100662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2963ce23d9fd355446db00b042a6a1a4e06b2278a2847ef0769473bb6d6318. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/JPV502100664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774c0cf07057ecb39bf5c56ad8e210854d46f8d41a2a19c10ae598d5f190afcb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPV502100666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3db748d636ea8ed46cd8d4c65a32bea36d0a0e3dbd9c0737759e43a0fdf1552. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPV502100669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054709dfbcfea03a5d6080e7eb7c193c9e0d56d76d4dfd0d0198407d1487ee2e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/JPV502100673.