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 0x1ffd5b378a0dbab7792d6769aa675fa2c4f4c751112037de414d5a6a92f355b2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c96370e-20c4-4b3f-a3ef-6017b4a9b3e6.json and https://artists.proofprofile.net/proofs/artist/4c96370e-20c4-4b3f-a3ef-6017b4a9b3e6.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 0xd92e472e47525dedb9528105c1dc87ecd237dfdec07943253797bc7bf0cde1db. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWZ2435868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07330d775c5d2e6e66a9261e8d0ac771e4b56006ff655a4791ed734900c8fed9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP42437756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34f96f7e1486b1fab4fde980f278bee9a0738457e9bd6056b9d6b72e6ce375. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP52406233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaa22c3a2a5621f45a27bf63a0315eb755d6be4a359ce28ecc24880ef050230. 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/QZTB82494622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72261c62110ada6ae084580f3b473816a1b01538263e1058cddacf3bd8a06b. 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/QZTBA2419392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff357468c521c016e23c4243d7748397cebd60084951921c36e822d1e07e707. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:28Z), 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/QZWFL2484691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80351d38fa8ba6f8c292b80748a0706a9a9336cfb5cc44643fcdf7d09517c41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFP2498346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad43f1113a8120acafb1ba7d2f9bdab192e93dd2914fa681784fe04ac5178de2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFV2434489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd1af4a07d58c442b5bdae1721e9ad5a930992c21b6b453f93d5e1bc746afd5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ772488150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b592117c2e2f5dc7744b0179cb2ec759e2f64f470fcbafaa6d1274ddb0b7ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7M2452879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e896028d8b77e1451c18c611068047c3527c39ed7dc495e0c74c7b6adaf664. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:45Z), 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/QZZ7T2429021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefee54b9c4630dfd4a2ae9834d211486ebceb1f0bd7d0b7c1846165e118efa8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7T2438758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb50b5cb4a858a710317061eb6eeaade8fc7db502d07a33ff965093cb0211c84. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT3EY2462474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec653dd36f44c8c92cd057213e7b7139f1d704e483010381704d7f6a14f7bcbe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYY2551292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5c5d1a138b9e1dab7ed8eedfba157975ac8e0cd86dc6e17b634540d4e2ebb8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ32511080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5911125f644da5b46bebac8db77affc274c1efb804adb682ecaf4df359f54af. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ72518293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115920f14f129708e3c8475223a0f61705524fb3d913862839fdc198f5af817b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA52582784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a41f9dd946743fbfecde16c7690a086a096f837c92c07b00d6d64daaa8b7a. 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/QZES52520527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ec5b96fdb83a30ff0859570a719a902fc71fc82123bc23f44f908f2e5e53f4. 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/QZES82530910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8352510503490a021d8596bdf3324ad0e9fb6e3fa63467be67183d792ddd218c. 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/QZMEQ2502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99dbff12654916f508bc4365221c00547f3797d0c115406b1e9a6f8ca7795aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:58Z), 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/QZRP52512913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993f04786fde14606cccd97d53126dbd7c0142534dce811d659081ec0bacbc9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB82526144.
松尾芭蕉 奥の細道 散るときさえ美しく
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72ef7648867db20601e8b4e98b16023e3293944609eabe24b529e9c200f79d8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFF2591377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693126627cb5876153205d4ccf59dfcc74c812ae32481da8fb4ea20464ecd5ce. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:48Z), 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/QZZ7R2533484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c78fbaeb37cec078ba0590170eff6495a7bc616fa2edcea836015f910d68a. 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/QT3EY2546459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0062b607cd6199b9205a2a5ca56e95622e9d87752e58bb9b6b1ff2a07d297b6. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QT3F82542331.