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 0xdf9d4e239374c2c1fd47e5c598e6e08b0d70c3d88696a9f7f97b49da4b94b54a. 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/6e5e5dc6-ac33-4a13-b508-8f50b7d1fffe.json and https://artists.proofprofile.net/proofs/artist/6e5e5dc6-ac33-4a13-b508-8f50b7d1fffe.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 0x5278a5c0e91b58065679c94e9075dc0267fbbfb3ae3f508376a3d0d0a3a63bd2. 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/QZPLR2365687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6158b46ba0e6adf8219ee293af9fd380f5a8a22e1c7331b91b11905b6ce56e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZPLR2365691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a8bd05f92dc8fbd267723afaa7c92c94901f22e8f709648423441388df5200. 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/DEXM82100936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f98dfa4826e67b3b69c7fae54feeacdb84ea92e21e597829d96bce19cb27c2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEXM81900544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa6b6d71e666df2c36328f66449bfe444cd8a9aa909f3094c579f11094cf0e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEXM82100946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274f1b18e5e59e53511d72d8ec99ff10d16d77645c45d492d4e743cd861b62c6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/DEXM82100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de43e27f9a98964dc46c258937d4f4f93ff11b803059be7c94a0bb5141af850. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEXM82100974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d950bc04872ac1d8b5078583ea288aba5666139527b0e0d9cd0719a9a8ecf5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEXM82000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450b85f741090800c97a8d6ac9d125f3b689cd8d56dc14ae341c1dadb1d2712. 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/DEXM82100965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6fa753c24d05ed8dd496a717d367ed8c6f6542be47a817409f3f70074e211. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEXM82000638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b0cfdfccd22af792b58d5b98a3ef0c6c980a4baaaed26f00fbba586a0671c. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/DEXM82100984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb7502a94f9177fb454397b204a18460e0db8159d982345d17eae5ba916d9e. 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/DEXM82000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16de251b57e365aeb27ce1ea7a4387d350cee5f7e69dee7acc645aa8d0a728. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEXM82100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf147a0b51646ae5e816c70e847d56c569c56acbb287ec8981d63b0dc79a6cf9d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEXM82105736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd052682f3c73aa99c6288c8c976998e6a505c19a7f1174c09cb9fd067e8abbfd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEXM82106904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3496d8e8995a56f4d88f00af61161d7b4b8591fb7e3ade96af6301e7dc14113. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEXM82109360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499d25bbeebc9ac2adc5fa013a3b0c899bedfe4076013699e4b9f03079eb7dc. 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/DEXM82109440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe580a464b52abb1a98360ac8ce3a582bcd195bae7ff575ec26800885746f9ff4. 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/DEXM82100956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b74ecb45d658e36be2f4ec45b5175a7fcf5d3ee1e148363a594755d6735f294. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEXM82100954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274f1b18e5e59e53511d72d8ec99ff10d16d77645c45d492d4e743cd861b62c6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEXM82100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6701e550ec8e08ad8588b8b6b7367ba649be3e2e6213618ea56d1bdf4b39fa. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEXM82100935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633f035a43a63fa950bd21a198c5b9756dfd9366d1ede0e00412eb985233315. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEXM82109514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da37cc7c43f4e5b95d7b0797ebc09a2d0a9eed4112abb35e1452eccb5636271. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEXM82106194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4411d90850d936ccb9be557260b7b525240f1feefd303e0f9b97f9e173f4212. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEXM82106077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca26eb81560af240eb6c29b304b68e61bf00330dbbd795d1142fd4bd45346c4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEXM82100953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc529d06a3bb906298eb41fc28f46b3153510f2042eb29de76de02acadf821c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEXM82300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae6c73be01aee7a75185faf5540bf3831e22a9076cd03e193e06dccd5d5548. 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/DEXM82300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa63eb5fa02c1261658a3383b36e84f013034c6abd1f454fab9af5e3c01c247c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DE1KS2300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392df93a84b9f1e51af61b351c9af52ea93889d9b3446df1d264ec46d6d0287. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DE1KS2405600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7977ed987edaf4e8cccd74213f72de284e2f0824d9d5af506d059065594cd7c. 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/DE1KS2406803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c219d2499d3276a514320483cf46d351eac9313d0befa3dd3ee14bf14c68ce. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/DE1KS2412704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f9ac22df39f241be9053302aa0d701454efb6115d9ca71f556d11da5fadcf4. 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/DE1KS2500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba7068db81225c46c1ffea86844000151597673ae3e9b135d5867c7cf841e3. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DE1KS2500597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e38bb3e65485c5071c814f4306c2a45dde2ddb2ef4d39d4f3d85710a5ab2e1. 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/DE1KS2500616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1735fa3358e8c630e361a74f72772f76d797a3618d2c487b5c1714ddaac99f10. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/DE1KS2500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e90ecd87e8f593f7fa3ae476cbcaf1a609f3e51b555a708b9556ea4c91215cf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DE1KS2503015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4203c8577df08313daa04222ff72e1bad92d920149d980e1d01e75906428e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DE1KS2506216.