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 0xee8190d50c3411c6fee85f9d4bd05494553949e10469b1ec0bb39b6b76da6b5b. 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/f60a7b68-6aec-486e-b0f6-3222948228ea.json and https://artists.proofprofile.net/proofs/artist/f60a7b68-6aec-486e-b0f6-3222948228ea.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 0x8f9a596154e2433c91fb7e6a34bb28fa3cb7e6f68ce8dc1e8954f679dec2c165. 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/QZTRX2474416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31170021f695cd11355fc046840018089cebe2ffb5aba2b4c2f867f935fbf372. 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/QZTRX2474422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8419b52c5cb090e3e3cf20fff715e5789d52c78c7cf1dab8b47570eb6f010e57. 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/QZWDE2257127.
Castle Walls (feat. Casey Cook) - Ravenscoon Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164ee152eb755d402770bf4af6ce622c552c082f9f79d74110b13a7491e127d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBEWA2205074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7419ae530a9e1d433ec65650096a12c89d1b975140b2616f3ff6c2669e6346d. 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/QZTV32370821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ea0a4b9b382f90be084629090e174d558757f1d5620a7eb5a21a5d2abffa8. 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/QMBZ92049492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e25cdda3c44b4a978eb371cef0a21387a19a35a3f5a236ca4f47defca748c. 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/USA2P2135865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f70ff1431a836b5e3351e4e7c69df201b9a367563602915a851d5a88acded2. 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/QZTRX2474398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6580022f504006f13285009bb2cf45c25d91e77bca4b0fd928e2d097816424. 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/QZTRX2474399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0400c382fcea4fda336f51deacd5b9490ed5041b91dc414c585ec9088fd6f63b. 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/QZTRX2474400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45516d44ad42380786c1e282527c43c3ac1291b08d6dd11cce0a14d077b3d681. 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/QZTRX2474401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5b288a6a02fb41dd4aa6ab74ee1bc782616094282410db2ed5abcff820ed1b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTRX2474402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24524297eb5698072101c07a777ea295dcb6e9b70c1f90c97a3e19011056a52c. 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/QZTRX2474404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57bc9ef58abbc27fe8cfc8f88bb0c514fb9713cebbb96b4590ed918b9cdfac7. 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/QZTRX2474405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe198a7e65ff9aa8e80267c8b1fe11bd98d232b5c993aa37e124b6c9486886b65. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:38:35Z), 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/QZTRX2474406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2d9e71c5922590ae8ac370e34b2af67d02cbb96865b83246150ad7ae7811ae. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZTRX2474414.
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 0xdf8c0f5bdfe2420e432342ce98fae268dbac8830caf43a4dd57ce02cbd101cbd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWV32358943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded4de69713c3e73a1f436c1f9fb608bc79e8864724ebe47475710d4578a0ecc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA41927253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94f4e512f0eba3c6e6a63aab0679bba05c450c0009f99e6cc4754fa0d00a856. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTRX2474408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bd650198bdab86aa4c033ae6d91b77dba2cbd842c2d5b94c0b56216c0aedfe. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTRX2474409.