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 0x8cceb7083f278a546685056549a95d3891f54e72c90c2b652d0fb185291e2685. 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/48db3a74-f3f3-4621-9545-52272afc120a.json and https://artists.proofprofile.net/proofs/artist/48db3a74-f3f3-4621-9545-52272afc120a.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 0xbd3900c6e9e877ffcfbf4c65ef24079be9b2ccec22db71ee7e5aeae2aa972398. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:43Z), 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/JPJ901601550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a30341be489d6c0b9390a68be865635416216b5b3c5c62beddb68ed1ddc7c5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:57Z), 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/JPJ901601570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c942c39b3ef68e44c7123a80c01acfc424bfcee1c2cfefa0bee82f94faea2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:27Z), 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/JPJ901700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6bdeaebba23fc90567231f44b036859fd422639daf9fe82db1d4b8095465a9. 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/JPVI01741060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29674096a52c2132141ea4faaf7fdbbba0c2d2ae2af880f258961abaac6590e0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:38Z), 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/JPVI01741070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279b1cd4e908ae389a41d710cc596be5c50c8006db7cecce344754b2745f504. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPVI01741100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ede9b7db32d4e4940738b5eabaa40d5adb52430a0bdb3d0cfd3a431889752e. 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/JPVI01741110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6110900ce272fb669d410fd2b3c8cc0ba3a55cacbfa665a1f2ab1cef2216b211. 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/JPVI01877790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea6299c63688915ed1178874c3e23d844a1f35361f532cb9ad42edddf1e3d14. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:26:33Z), 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/JPVI01901750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7523646aeae7828fd893ec265902a419c78a1b48ddb0d98ed47f91df8867e31. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPVI01902495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87922ac59f671f6ef0278ac13a0aa9ae62841446213fffe33b629d68820903ba. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPVI01902733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a9e99853862f142622506d93a26dc4b2c162bac00df37ae6328aa0c0b3bf75. 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/JPG102000864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad3baa036b2c56e1f91916f5db87fd3eb1ad2afe7c5fae765a6504184f84557. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPG102100584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31249c4edab12077e8761cf5bde7a694151a9dba1d2778b7d1ba0f2dd50385ad. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:30Z), 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/JPG102100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dffdf48d1c675d64b274d3044ec88cee08f3fd33a2b76ed3db323274c71f2f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPG102200504.
泪に唄えば (mini muff night 2022.08.25.shibuya eggman.ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6814d936b8e1ba618f2a961faf96a154757d85145f8c08cec4188f33c14f80. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/JPZ922307143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf35b7c242400fcee1c9e9dfd9d612165f3be4cbd6163192455c2950ac462f6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPG102300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2714a911a7b1b4d49c4a678c21a263d2c3e073229943d45f5f2c0722fdfca83. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPZ922307145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0aca06a999c9720d6be0b59cf32729abfd01edc3745a0aa2b24d2914676671. 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/JPZ922307147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda09b8cf6e6933ab2cc905e09d381b67e5cb792a14874cd2f6859c5f9336095. 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/JPZ922307148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abebdb9d1b9abedadce7d0776c19bc95f30a7606f9dd148eccebfbfa1e63a9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPG102301644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288866adbdc9cd6fe6f291b055a71688df8e5cb24bd0938ece0c36dd08832f3c. 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/JPZ922403074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64747fcc20953e82e24fd38fdd0fe08c6f498cb6d197b7c1dc79924245cbb7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPZ922403076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a22ecbc9ab336d7ddc2a1712b0f3204015fd6d377694c998375e08323f428a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPZ922403077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940079825570c45d9b753e53208e109d02db65f34b52c973ca5040381d794100. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPZ922407280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f577255428b92a2b4b449b53f339a6c19495750f5b5731f2ee1c492d37f822e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPZ922407281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cee018fad9f682e4ae08007f704328dd7f69668bbbdd75d95fe20b46979cbf. 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/JPZ922407282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa868b9a4a16f4c2d980934de21c329ce83e9167d8758fa1e66105ef3ac01afe1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPZ922407283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ba18d97c152b54fa7496344ac76b4889f15080aa03062532b737776723e5b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPZ922402379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43026d060977c536114dabd32a1dae439086c12a50e3896f710f5eb3ead713be. 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/JPZ922407284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257639463356323bbd6fae0a189825f8233b27c9beff4b2fca94f63ac50513d5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:37:37Z), 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/JPZ922407286.