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 0xcb6b54184a06be23b1e5bc766801dacef141a6699b14a3b517caa62d6d3cb38b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4592cec1-7e8e-40d3-a1e9-a40ee1001ea9.json and https://artists.proofprofile.net/proofs/artist/4592cec1-7e8e-40d3-a1e9-a40ee1001ea9.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 0x098588a15551438a55cab0b81830ea92b93e4dcc102be204cdb77ae0a04a6b7d. 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/TCAIZ2459492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59833ffa2c121087a9325d27a9277fa188deaa0e80629fa8f03ad24bbb96908. 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/TCAIY2488109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe74eda083962cc8d83fe4b734aa079585ba389210bc8ecb5b60232c4134c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJA2409116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8a43dae2c24c9296417041c2bdf40b24c9cc37085fc3780191f9e4cbbf5bfa. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAJF2503221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273cd3d66c1f9524e983c7b6cb64acb66d312ebff2586dfd88d0df2bca6a34a7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJF2502917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96332cd4084796a55a7f3e8edcbfaebd04ff260dab07b8ffb000900be18465b1. 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/TCAJM2587779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590c00340b2e4509ec739d3b8a2cd1c5c01fea3c988ea5755e92063c7acf28fa. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCAJI2575551.
มิสเตอร์เอ้าท์ดอร์
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd379aaefb1223b352b18addf7a0709ac1f1f197953818029ebf25e06c11bc7. 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/TCAJR2502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5e283ba418ccfeccf09f6791036e7be263917b714e759c5df3be3f094e5ef. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJS2502073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d21e03733d1f36576e559fd9a82380f607a0512749fab2d7ce5ed9bf4806bad. 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/TCAJU2585121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3bd2f4e7a368aa060ccd3ee281dc387098544e4e5b06d52df6a4500ad96ef. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAJU2585388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e79157b2f330d8543f13cc2adad39c410d0f453a1556c2324dea8120eebf0f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJZ2534500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a286c4e642ab86f2e594a97884db6bcdcf1cf6d9619f62427ce878727916e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJZ2534504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab746bb1576b5b2222104aa58bfeb9a569b8b32b805bb357f005dc9e041a91cb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT65X2543148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec73173c4ef1eca04ed4f00b03cf936e7a64423bc9fdfcfecf65c5684834a47. 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/QT65Z2576288.