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 0x08fdffbfb584a7750d149bcd532e3e9821e7e350e4ad758bdc1d5b2eb1c32d86. 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/0bd4873e-2789-42b5-bfe6-3926082e9d08.json and https://artists.proofprofile.net/proofs/artist/0bd4873e-2789-42b5-bfe6-3926082e9d08.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 0xff9c11506a208dc43e77e9031395419c6cce669fa19960344d5e6b257d39e0f2. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR96X1991242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb6040e4dd3772db26f0c8883764e912f827bc97e2c3221b6d78a502c304ff. 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/FR2X42061337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358b9b3d968d907b79316c89fbac0359e14e89e1fb56ac6c9dbf5cd880a1b01. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:02:30Z), 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/FR10S2193206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347eaaf5249aa693814f79db68ed4837fb470cc7b00e921ee8381f541a39e2e5. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR10S2193202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358b9b3d968d907b79316c89fbac0359e14e89e1fb56ac6c9dbf5cd880a1b01. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S2193206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc351b4f439ccbde9baf84534cffa865fe98df5bf7c51d69058fef661cfaaa03c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2193205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dd6fbba45a240c912a0e66dbfd04037891c5105933764205a051aab02fece2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX452186304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82368fd6ccdc9f2424343e3f8610bd673462e0bb62e093cc082878913b798ef5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX452186305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61d1162b9cc9e1554ec26249f3c852ddfcb7732bbfe297f4e3cfd8e9a3aa7c. 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/FR2X42299028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4ae7de909f3ce461f591f6a24286a3e4a732ce43b5381090cd075d2f84b874. 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/DGA062227358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf1d6a29be1ee1a9891879977a328110d3b138c8ad9ca5373a47a16b7356f4. 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/DGA082385955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ae1745b3fd3cb5012b735917b73a72263c25e05f67821e0872d79962f8950. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DGA062490018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd554cf429ec58ce38644dc1e4784bb9afadb2d18f8eb6396c4e8b27f573676f. 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/DGA0P2406334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5961a5a5559286d2266f0dd1174b39a15515f763090c9945e31b5cae560772. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:20Z), 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/DGA0P2406335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfc16b31e3b6000d49ce42ed197537ba04a34816dab3374a9853b7cc559006b. 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/DGA0P2406336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f1f9664eafc84db59f9ce0402d58f3379a9c9fc21af5eba59da98d7b57b60. 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/DGA0P2406337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71024ac74f75cae0f85f6176b4256c1ba7c4f9fb04672be19c57a7967988ebea. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA0P2406338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcae437380a2b983a1c9eaf472dc24f39363d6d7154bb06beb4e544b8795e7f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA0P2406339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d93c8f7b0379ac3837fa623a34daa9f83a4e89be650f23b70e0d11cf7bf707c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DGA0P2406340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445971d1744c666f0b8fd1f883721ab2b46c69e95d6df4e8461f9446b299bf43. 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/DGA0P2406341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f08ed8a6344d1df050166ac58e5c9e7b7446ec9daee00ad5b4f865efff99f. 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/RUAGV2508443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555b4017ad12de3e171d3b907b4fd52b6eb20f076d8cf6523248e6aa245d928. 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/RUA1D2514185.