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 0xf5697e4605d827b13b68f574ef18e97f4901e78167cb5d45f89ee8a8f56cb6b4. 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/e9f21eb0-19ef-4561-afc3-ff0addc66a4b.json and https://artists.proofprofile.net/proofs/artist/e9f21eb0-19ef-4561-afc3-ff0addc66a4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pesare Bad (feat. Sohrab Mj & Cornellaa)
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 0xcf370f68c1ec889bcb8621fd63813e96dc7408b065b1bdc803933f4ef190db3b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZPXF2120120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3721e20627c1ae007350fa6fb3cd667e4a5390187d463f5ffbd0b533c13e7d1f. 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/QZPXF2120168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9b8bad8b5f4adb4072100f26f3c40edc0ba2f45b36ae719ff9739179e9f39. 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/QZPXF2120169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f3cca15895a604e6e8ec356eb3b2df0051e8c2f3d3648e75f2e61334cf4f33. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZPXF2120171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e118658b45c4694aa431a3305b16415366cf89611714723cc7c4604adadbaff. 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/QZPXF2120172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca60b8558a92dd42c7c04217b4a455001e8b31735f5ea7662fca8249c2eb291. 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/QZPXF2120176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0a194198aa2f7e09935b959ca90510de1d731c8db0068955cba2a4f350c68. 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/QZPXF2120177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aa932009b3240f0e2e47e780cdb2bd4b751fd16c9a438d55d6439c3650cae7. 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/QZPXF2120178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4104228059c0d281fe2260fec2a6b0158791d0336c8000b3171dfad96f4a0e41. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZPXF2120179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008c4e0440a463b29c8f3b2fae89c783bf018b5bb7ba061a46af1ffa9659ee30. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZN882138658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46058ab1f94961775506f4f26c03b2d6aaa2b7c873d7c2c7f3493113707366. 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/QZN882147730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82c0b3aa4d9b2ce7ebf6af77c654f7bc0764d7632481a3dd5bd48aa031b265. 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/GX5MY2270393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d306ad264151bbd4aa07d3f7dea73c1fe49c18739de661635c40d3dab13d6e9. 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/GX8KD2252733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305546f4376280b5dba3e4de0789a57c8452de80af7c281ad3479695385fb95. 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/QZDA42361469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f8464d9dd96ebf086fffd5a9766a9eae799247e04e939a86f36b5bab04f884. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA42361473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7309af5cb94b01c36de7d9f8981071d9cda323585487074dbe3320c1f7bb2. 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/QZDA42361474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e1b8db7d40aecf9826d027c702e1b5875c3a0996b8fefdd8c7a0c08ad08257. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA42361476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35809488de957e5b497f7e4a9c903a7c64fa8285d5b9744f16a3093ba63c5751. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZDA42361477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95840e0e5b63bf556eae62510d292ad797df1cc37fba74bf2e6461d6d3da28f7. 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/QZDA42361478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29d22373cac534602861e4a23da0e6646f7eb1869d07d1831a9a1d03b22e811. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZDA42361479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e19621f2fbe56aeff63128d27540358719f84dbb60a00f4e8589ab7c732e4d. 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/QZDA42361481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9b9057c8506330e0984f0bb57425cec78e697b818d178f2075546e00f695c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GX8KD2376006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ec550b39c215673f77072f04515de8e67b192727b16071b050e21046f160fa. 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/QZNWQ2330894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03a7c78f8c186dc414f61f0d533cd38be4c66d990d843c33b29fb80af39490e. 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/QZNWS2376672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a99723663adb89b733762e00e78c1ae9d2d01f3eb3a867a3ce44e30230832d7. 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/QZYFZ2359672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf55ef0e20ef2f58975fbaa3fb9f58c9f2f0df280f5b9166ecd4cdd548a385. 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/QZYFZ2359674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d29dde328fe5b7ab81504bcc2f60635ffc1381c5554f47e54ad1bd255f2922. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZYFZ2359676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a7bf42ff47baa2010b751c2ff47330989bc3516508a85cf019586e982b4565. 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/QZZ662301035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d94afbca8db1f7622406193444d7be212f2fe70166dc31a19bb2fa95db167. 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/QZZ662312763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc871a336246304ee50402c4f573dc73645db5cd704116492d19803c39c1fe08e. 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/QZWFL2382853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2248cabbd0d41db17f6c997e2f8242c54d2419a68c0df902d596c9d4950ee1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES62481971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe911d5758f92eb5a48297f5cbe726d995047016ef534c793490bebc18b5a9. 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/QZHN62427709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7fbc99e7f66fa3b5bc6424e782b4354bc024a4b7c0f459ce64d274f5c2afed. 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/QZK6N2478410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30841fdf6d7d72e91c0ff84a0b54c746dc9ec3651ec4b6d99d1ccd954e442d99. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZTAW2450810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d92147550bf2a68cb8645999a9a259c25e6c9e7a6942eee3f03256735d5f0b. 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/QZTB62459268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06871ead4aac655a25d856b41f6606a4a8391c88481dd76a451526c241c2fb4b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI82215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21350c876e4eaa9e587c7539240a2e2b08205e5e3bd78894194c2d248f75dc79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGG2228852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f2de12a833d221d9763c15b36a7a8d61a827a01ffc33cbc5ea2a50cbceacbd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82211956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15435d8ebc8029fcb3b590af98b01f4c531dffd84d265f22f71fe8e90ed4169. 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/QZN882156419.