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 0x88a00149b0516870b7060574c96be05ce9bed6d0f143005c14da5c5ccba27129. 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/e2d28fb5-9454-46e3-96b3-a397e3568a05.json and https://artists.proofprofile.net/proofs/artist/e2d28fb5-9454-46e3-96b3-a397e3568a05.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 0x4b0e13f868b81e55f20dbbcdceeeaf6219ed3ebd8bcbf78b90ec5fb1aae3eae8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:23Z), 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/PLU031800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3664a81b4fb3e3c88b2492adb160c3f9fa7a66d15e123717058dd9c756b8dcc9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:27Z), 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/PLU031800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53090e5193571090ecc9af3a40606c2fd007143b9929d488a9520ef17c113686. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLUM71801218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d6c3cae8a3238dad55ab3e8eb80412cfd8fbb7a124e325429a9c47abc2de75. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLUM71801219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb1b053e128549f3e9dc65403b85e07e684bcfcde0f7c17d75d8fd948efe87a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLUM71801220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f925074295b936ae2b45f74aaf8f66da9a8997c5d74f6166fbcd8b1e00649f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLUM71801221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e7aab7fc449a0e844dbb0383f18f3e81e9c116d140d0a3231438dcd4b31f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLUM71801223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96f1e81af7952d1dd093d7f18d6a46da3a0063d881a81fb8137b724a1e4782. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/PLUM71801215.
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 0x08db3d78dbe153c4a06ecef985c6e134f2b1f398270c5503fbefb279e2f43a1b. 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/PLUM71801216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad29c3f79f08dbff940d1c4f3b646bc05cb35296b8e6dfe1f230d66f7c304c1f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLUM71801222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5a960f2d80dcba386bad970a056945577ad94dfcaf7e6496bdfafe77e6b74. 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/PLU031900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0989c16665251cd7efc6573c88635237c6aaf4f7f0f70e4ed5320128cff180d. 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/PLU032000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc0209b69684a5ddae73dce0ec980d889c3a06e3b63a48a01b919593ed9796. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLU032000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c992124cbd34f3c6d198a788471fa1e07f97aa86fc4b68712d832e12bd9b61. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:50Z), 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/PLU032000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7318a0fb239fe59ec93e357a2750611bebd647264a4fa47542b0f51dbd767. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/PLA552200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ababe2e921e36e21613bfdb6390f8876158e0631731d56d305ae13d8600627f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:22:48Z), 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/PLA552300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff1a2e1c81a4b6ebdb8ffdb80aa0e46e872bdca9037af71fed974d68cd75b3. 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/PLA552300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18714681bb4f371a6201a9c95b8e64c4f5ed01d92c2060d91309f65cc77bd25e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/PLA552300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6815c63fc7c13965f9ff172a665205bc6eaf7dbb7c9fca1aaeecf0eb40d36d56. 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/PLA552300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b100041f9c702367aba11f390e0ac008c6d91cc30970caf2abd6fd76264a68. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLA552301113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff1a2e1c81a4b6ebdb8ffdb80aa0e46e872bdca9037af71fed974d68cd75b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLA552300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18714681bb4f371a6201a9c95b8e64c4f5ed01d92c2060d91309f65cc77bd25e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLA552300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7318a0fb239fe59ec93e357a2750611bebd647264a4fa47542b0f51dbd767. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:04:56Z), 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/PLA552200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da2efc711857f6d8414f94ee023891a5e5420c5de2730ac9399cac39fe6924. 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/PLA552400580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358378e2f3598bba7442774977e5516f5c1779a3e4b6f67140513cb3a4281399. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:47Z), 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/PLU032500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457381b72070de87379003b3c78dc2f92f9f413180f771094bbc3f5e5d1584ed. 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/PLU032500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9120ea3bbf154db7d9530f797f29abe518de81cc43f40edb1205890d8567f930. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018a93f51f39b3ef32d98f098c8f551b9aabf801809bd3074652938e276d4578. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLS281900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018a93f51f39b3ef32d98f098c8f551b9aabf801809bd3074652938e276d4578. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLS281900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0610b3832dbee460aaba33ccd2fbd987a4ff8c607bf0765294f58dd2bc22345. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062009422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5cdeada5db442d6716453ac45c12db6cb39dee106426f92fcb25fe87554b3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLD111700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea59c3fab4dcff404e42ffca90fe6dd5ffebac72098800e038c1b890d090a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLD111700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c353c31f17607eb93b8142c9c53f741eef0c64dd895f51de0e0268067d921. 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/PLD111700022.