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 0xf656218f1ba72ec7e547142d2a34c0045db318494559d02d9a74d22e45719cf2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7dce057-5485-4288-873e-6e2f5d12a94e.json and https://artists.proofprofile.net/proofs/artist/f7dce057-5485-4288-873e-6e2f5d12a94e.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 0xd6eda0cf19c41635b0c442c4488303ff144096242bae8ae7f787bff207d18b0c. 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/QZ5AB2362847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddfa249c3b14d6c0583d37421bfc1a7c7b46cb6c2aa665abccee4c09a238acb. 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/TCAEA1839365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121bbbf235918289eb1d430c638e767b4b66669c3547786cdb27dfc1ab3ea8c9. 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/TCAEA1839377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38439c03bb7ed0f3129d59d0b162185337e964086efe4e794296da0a23920b09. 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/TCAEA1839447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd12f28eff8fbac1eed9bc601c9fad842a356d6bc1dd8ccd7de7bdd807037e4c. 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/TCAEA1839571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb1cd5f0d92b98ebee74aac60886ed4df5e16a832d56c5bac619bb2ca8f1cf. 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/TCAEA1839658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a5693c91520d55d58428875a0b908b71c99f182fb126308ee71feee6cd261. 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/TCAEA1839660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206acd10305951444631f1536ddcbcdcd9e58810a789d6f5e526ddb94c99e21. 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/TCAEA1842059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb3c4a90bb7da99aecc3728ec83a38a8448a036fcbaaf220eb230f28f5e48e. 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/TCAEA1842062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b2eee557aac6f3f09d057f2add3394393d0d5415b78e73607f68714ceb9b6. 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/QZ5AB1623704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ba7782d77d9499f8894e14d5b49d41cee2d2ad603a9221d742571bce27803. 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/QZ5AB1623705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae03a5c8f0d4f7c07b3b6d8b13eaba850e29afd30d8a4196fcc74c3dfbe5fed6. 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/QZ5AB1623706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa2c85daacfc0a51abd0c55194a0d6bd8471f2f876ea4c4b565cc1b5d874dde. 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/QZ5AB1623707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e442b7639c8c9f68330515382e7d6fb33409c30bd32b033ebd045fa0813b1ab. 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/QZ5AB1623708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f22bfcb21d50f636027436d362d9b2cb902277a8153043df918d8494a3167. 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/QZ5AB1623709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659725ffbf34aa0249b9eed2b1632dbc4f6565852715604f75c726be61bc7e59. 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/QZ5AB1623710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca6db3b3eca65a68923610026fd512313ea95b7333553d04ec8c12fb23c697e. 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/QZ5AB1623711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad10469c6e37160e062b7300e6ca8c9fe2bc47fb43391249f5356e60a6145665. 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/QZ5AB1623712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79da47b0ed94705701c1b0575c4cadaf398454941d4629d5ff6f7fdc376ebe2a. 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/QZ5AB1623713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4dd8294df9185d9ae49ac6e8b6707670c09b00edff43509fbbeb08b2ddce4. 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/QZ5AB1623714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99efa75fce41ffe1e06c8d364e686c01979d693e7d463fcb9123625e983601fc. 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/QZ5AB1623715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff466d7a6d267a680737df3f58cb590aedcec310d00e2d6adbcc2bb1941dfba. 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/QZ5AB1623716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b4128ed3ff8cbf754407fbed93c08f0a7e16d28a5a7076432e4e68e48ea3d. 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/QZ5AB1623717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09851b4ee0d732903854ccc2e1f850ec86537e31d66dd0543011e3bf100b295d. 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/QZ5AB1623718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b323bc74878bf1f7d0d03cac4beca1c525087b3bf85159a98b295181e0bab. 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/QZ5AB1623719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c942d404123083454a28b80e052122ad4fb686123279ac384866e6402a527. 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/QZ5AB1623720.
Maquetanderground (Mixtape Maquetas 2009 - 2012)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b82fc64beeb56c32130a3dfdc3d7ca19552cfacaa25e333a2efe57e91c965c. 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/TCAGE2271189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ccbdbcf3489b9c17017d776a2f5438d15303e935834cd0ffd3636d2c03b488. 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/TCAGE2271270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc37ce2c9c7c9f8f4a41e4f75d28ac554d90a6645ac1283eb226c9fc60cfdd6. 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/TCADB1730287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993352204701fe37306595c3b2295df0a46c56ed0105b436d05b31137c383510. 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/TCADB1730291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dc879431a39270e0ab986658985326f9d3cf1fee93e942b274ba04970dc5f7. 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/TCAFI2175683.