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 0x27c8b25fc23cd146a6d94c22605ffce41b82aae7fa4b4c6bb8b77efbf9c60101. 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/c22f6a3a-31fa-48b9-bfab-f3b840852316.json and https://artists.proofprofile.net/proofs/artist/c22f6a3a-31fa-48b9-bfab-f3b840852316.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 0x23e3b7faf7bf899147382d2fe10a0209b70e428b25cdfe8d71a88ac7680e8167. 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/MXF152100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8267e8337bfb30f8caacbd7f7513cca73b1d3d625b94ca6724ab869a3d7f860. 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/MX1901400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f017b5d520b5252e6a529ba3b07c4d338797d2ed144daa02a8094e11e653ac7. 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/MXF152100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0200f5733725e7a0f1d6a00291dd593adb49e7745e6239799648f5df26f388. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MX1881700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd58a5918e329ee4e0221b1b48bc4c1784c78be12803ce41c627ca0c4e84100. 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/MX1881800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c09287655eb88702f01ed1c6737622f6bf36fb84a650780812c562da17671a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MX1881800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63900824603594ae7c5effc08a5d80a70a38ed94d740b0602599fc6f5bb99328. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MX1881801079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eabea58e0723e8eb7f79ee253235ed5587e73d72a8827b5d22fd2307bd4a40. 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/MX1881801068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a80877a2674dbfdf37c2738866bca087d863a64cfab123ccf6d33093d0c89. 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/MX1881800787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf4b91181f4e38629ae0745f4e4f5fcd3976747eceff0085f377efedd0aca2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MX1881800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8a61efd209a071635582286a1fc40eb85ca5328e05e21f46ac5bce522a24a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MX1881801082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d93eac081596fa3037180730e8a66ad598946a3f3dbf52133cb4f7c62856c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MX1881801076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2602fc6d51a92f65cb5296d960d4133d59b65f425678e0a3ad026f03f8553884. 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/MX1881800751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7823858a9118ed2327682516dac47381b706129b305861848169aa0f678e524. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/MXUM72103404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7823858a9118ed2327682516dac47381b706129b305861848169aa0f678e524. 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/MXUM72103404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbce8262ac035620797b8bca1c64b2efd6e00ae89a631563c16e9528986a0d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:14:32Z), 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/MXUM72201422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5b85281259853f05ae5690ef64ae583a9beca0df127e3a27659520a7fbea61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:12:06Z), 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/MX1881200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ab70d11b55c917c858ef9b619e7d2fbf8c8f4b5836477d678ba26e1846c3f9. 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/USSD11900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822dc5a9eea6b8abab8de908eb50995b6fb910c85b7441e787e395e4df430222. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6DC1996720.