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 0x86ec55ac602d7356223550743eaa5163ac9b5545c90829e1b923fa9f2e135fb4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc8d298a-7166-4a48-82ae-c1361691ae44.json and https://artists.proofprofile.net/proofs/artist/bc8d298a-7166-4a48-82ae-c1361691ae44.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 0xd4e0307c03277e0f3c15f6a6bb6fdec91d7daf9a8b7b20b74b32eb64d52e5431. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNC2197411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8726dcad317f0c5f7848b86a0a333491933e7df3190ae72278c86b7c9c8b575. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHNC2197412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db29ff59d94c945d037194a3b603893ad27fa41a651a65c1525fc95b92100cb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPLS2330877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9978623e2537b18379ee5ccba7175443efcf885180968a7f73e2e01732970859. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPLS2330878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f87ca87ac3d2d5bb1b3bdef2153a979951950bda5d9da734ad66f1c210fcc1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZPLS2330879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4da083472e4fb516c2e6c1fb8fd70025cc41455e4a7beda4f796c49779e813b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLS2330880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37324e5dcfc983277453af2a884721828764a3d3f6d12d922098956a4f98a661. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:31:42Z), 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/QZPLS2330882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5cd3a94e1fdc5499a8b03ebb29dba932496e46d5465dad0f87deaddc5e2e69. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:33Z), 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/QZPLS2330883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc861e709582574b5ca37ac5d20ce9643c730392381e2445a30b869bc06d9f13d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPLS2330886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedc856fac73f890cd8161933b0d40b75255a33e3540dabaac1f025aa3e0d716. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPLS2536897.