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 0xc046ce06ee0a4871ec99f127b35f11cd19a36dcd903f000786987cf3f2a6b0db. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e28e91f-48be-44b8-8b78-9be9538d40f1.json and https://artists.proofprofile.net/proofs/artist/6e28e91f-48be-44b8-8b78-9be9538d40f1.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 0x16bf12a3113310d4e2d45b925d00b16c2e0bb7341549ed13fc19f415caa71a65. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZFZ22543649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e13a998ad3d4da73a5af19559f2778a31c91951ef55c85032d51676f0ffee. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFZ22543650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763bcc1b32d4c001f4461d092fe5066935148b719f7c8d4670a39fa476c2814. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZFZ22543651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee0875b76ffa8d6ea0c73dd06a9ae566c64bd657e1221147a70a1d8d891a8f1. 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/QZFZ22543652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc3b9dad4bdd5a6c352731c0729b786fbb5db62f1b44c1dc2ac2f3da3377b6f. 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/QZFZ22543653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67517e79e5e9f2a7ffc90a908d65fee7a536e59478ac75a31b31e5314296fe9a. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZFZ22543654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286cf7cc82f7fd31711dfcf09ccf6f8a0a35e255b6c3ca915f75aba208e70a8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ22543655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a89db0d6801166cac62c5f7fb251ab0a84310bd82fafe1954ed02939ca87ab. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ22543656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c1c550f823762ead114db45605073c739753b85cd736d2043eb69078e5dfa8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ22543657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58546dd47a91920a2492ea64a5cd6b2c1c360c2d3eee21796aeef809647b101f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ22543658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777806e36a422189b0440e1049ada1b70ecb8ffd5d2b8a5eb787442abd68f299. 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/QZHN72573024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafde69411b377eb7597c879faa68f8b25da74a6f7338cef971f87a48bb214c3d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN72573025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec25536f76c7fc65d5709e85e6951ce8e044d1eaa8b69fe2beced726e9bae34. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZHN72573026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06bd564ec9b5af98b0f8cb83b161c2ff454fc41b9083b022e9a05e77611dfd4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHN72573027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac5cdae6921ab579a3e9e86fe4c7676f79e8a1e9bb37e79b9da6c73a816063c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN72573028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a57cfe3ab6976121d8f59f32ec8e58ca2ee011db7458e84bce09abfc76aa53f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN72573029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49fab79409dd35f22c6072bda65f9601e136cbff2aa46f176dc1383c4b42a6. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZHN72573030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645ffa516f8d01fe4eeb55c92bcadb98aa4988599276fae6ae225e4a40f7a29. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZHN72573031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b31c62a30d55cdc86d50b179ca95be6069a4f451fef4789a6a85e07fd152016. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN72573032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb07a8f6827019b9340b1a9a928d4fe8a2558f0606a0106de36c19832a3223d5. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN72573033.