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 0xe72ee10e6ee8210e836a17ea95383ac5ebb86bcb5b20a5e2a4d39e9b3d214fbf. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e592b672-9775-4e6a-852d-754779965ade.json and https://artists.proofprofile.net/proofs/artist/e592b672-9775-4e6a-852d-754779965ade.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 0x27fe5aa6332c7fb437526601fd146d88600f0fe55b78bc0b128918a8d1d38fdb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN72212624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3728c0107d61b1c5d648aa4200963d3ef861fb32ba4760dfcb459d3072076da. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:10Z), 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/QZNWZ2290717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fe5aa6332c7fb437526601fd146d88600f0fe55b78bc0b128918a8d1d38fdb. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN72212624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6198283d605b9bb0733c10ca52fb3101a9a07c12b9ce1fa91b29adf323e29e9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:43Z), 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/QZNWZ2290718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93e0beb70312cb116bf96d6cc8ea3df71b464dc02e304039fae462782e9410e. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZNWZ2290719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd177c68ac057fadbc5d551f07d771079b7fe0fe44f889cbf31d3f1c002aaef. 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/QZNWZ2290720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1069d668f47ea465324faf799a72cbf161e41e74f72f87071c29e0cf8c7ec65. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWZ2290721.
Eberhard Square (Tribute to Eberhard Weber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088fcff35e42efe338319f444efc24da669ede6209037c6c881d15987abe329. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWR2338969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca1bf7dd325af4421a71f608173f4f42a1ae95339e57aeb32e623a31e1af1cf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:30Z), 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/QZNWZ2159154.