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 0x0c2bee6597e28e7a04c966e90a16cff55bd9f5dec21661c8390b8d62340a2cdf. 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/dbf68f71-39bd-4cef-9b7a-8e7020c4c719.json and https://artists.proofprofile.net/proofs/artist/dbf68f71-39bd-4cef-9b7a-8e7020c4c719.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 0x77e4f4780ab5cfc4830ebe04099e142572f3eb2d9ed729dc0011dd5cbb48917c. 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/QM6N22294620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5dff58b0482f2603318d4ad537900143fb4f97c3b5cb844fccac01ab977b83. 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/QM7281867858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990c51559cf26bd708e77dab03ad41a31b03a16177d746b763c0ed59b8efa56a. 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/QM7281867865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e4f4780ab5cfc4830ebe04099e142572f3eb2d9ed729dc0011dd5cbb48917c. 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/QM6N22294620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ad28b60ce9f4a72a8268a7bff48ac00cea11380e93bdb0ce360be927b3510. 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/QM4TX2354979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07c377fb66e471d9de7be491919a4e1596293f326db866db2ce91a0953a8f0. 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/QM4TW2495015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e21a3b04267983babf4a9854914a44cad802bcc8246be51d1225eeba7acf79. 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/QM6N22334855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa11131763329cfa6c67ff9bc33577918ce0de037939c5e33a2f2c817ccc9d. 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/DGA0T2438975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b39b654f9a863f17a7fe3e7fdc2c1177680e8e7e74895b6ad35765b0bf36608. 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/DGA0T2438969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff93b126a3e7a3d34e83f890d94606e3bf63aa6d065dad400aa9ab9bc35567d. 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/CH7812238282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8aef252dcbfe7b55ce8ea3a406d990b67a711483c82d8ef56fd0b748e76cc. 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/DEZ651712423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd10b0ab35de074c6cef7125737c030741a5544112dcd8ebddf2545c1a7314f. 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/DEZ651712424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d8641672ff7c85fb9693644391dd53985d6174bc05f3e5a100abfe8ecd03f. 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/DEZ651712427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc107f67dade6df56113d543a363aa3c772a66445611c9059ceaaa99fb523cf77. 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/DEZ651712430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791d151d3700fadab1b9724b7d4d4b3eb8624a73b04d1f1c4e3cce96bd01d84. 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/DEZ651712439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09dc9ed5dd2c41f4f7fbfdb16abd4dc6c5f01d295a1e6f49d7c6a936d10d49. 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/QMDA62495491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07b4205ecc9c21dbfadc35d70aa962fb7b9c0a30f59dbc95e2354f06c60214a. 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/DEKF22400073.
Kommen und gehen (Brian Brainstorm the Junglist Remixes)