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 0x4af60ef1a8e2aff31ff9370c5549a753e0bb7af734bac4de8ed4f3c02c10c691. 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/1a244d10-638b-433e-b9f2-76ddc473c270.json and https://artists.proofprofile.net/proofs/artist/1a244d10-638b-433e-b9f2-76ddc473c270.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 0x075e47c6ae062e7eb1541663f8d4ff0e7e32e9ba1263aad4c5b00be41d27a46a. 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/QZNJV2037967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9d1dead134db006a0e972a31b7a3b3859bd60a8066ae65a8ba8f37d7c8bc38. 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/QZNJX2221655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35704e52e931ea7ef62d27e35a61a353dbaec45b2b750b53ef6f1b287230026. 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/QZNJX2081976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54528d0af90572dbb1f69e844435661cf2965ed9594eeee589f500333e6e07a. 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/QZNJX2081977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1943202417bd0ade727511fffb42392446bcd07eb05f6ab4ff56f72e574949c. 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/QZNJX2081979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4daf51935f6bf1245285cf5a749ac5ae45c2d09d74f12751cb35d56900e82ed. 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/QZNJX2081981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87604e325660d9fbf42bc5ed189f81b9f70e9525a58665780c351577e1d3a9c5. 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/QZNJX2081982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eafd824ac5d760e19ff06137e84c31c0105423878f9d42be0136b926075ecc. 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/QZNJX2081983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0498916a74840c35282d89323935793913a97abf4bd66b6f543b5cd3f9eac2c. 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/QZNJX2081984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe692516e704a38c468659aa3eca0fc54b4dba89e07a1b2a326268ce1b190a8c. 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/QZNJX2081985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97643b76c1ef22149958d7a99d849222a9676bd59df71336d03ce37cebb5de. 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/QZNJX2081986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e61c8e5f2df9457b3067dcab33b56116051cbd63400b9237d4f58302b49d97f. 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/QZHZ62177728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167ad22796e83f8b21b412e7abd1a6c764a6378dfec3d394e1f97ff0a210fbf4. 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/QZNJV2158053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812bef17c2ec3534ab4b7f7edcfb6833042be9e199d5339224b3ba896072e1a2. 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/US7VG1773375.