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 0xebfda4c55d912c72e5863ff2bab1c9364dea014c36c5ea47ae2461858751b086. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6dddf19-decf-400e-b5e2-7a4c23748036.json and https://artists.proofprofile.net/proofs/artist/e6dddf19-decf-400e-b5e2-7a4c23748036.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 0x5ba667827d13295747e0b51e676f77debc89ef9a2cd7285159a8cbb42a0e8af0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:52Z), 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/ZAA019400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e01e477bc59c20716ef15aebb1b369068498f35a950a2a75c87a780918528a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAA019500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c37a7a9709af670a88dd2b3a000a813edc6a0bddb50bab2ddcfca09c104d0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:33:54Z), 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/ZAA019800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507a0e3bf02fa66bc80b6968ab371b074c7c8ce2d20445d6b624912311c39ae8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ZAA019400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca73fbef8229f10656105346bed12a21c6e5f8503afaaaec65ba110b9226fa99. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:37Z), 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/ZAA019900798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e4f9d721571edb0384cdaa07712117305e92bbb41ce2c172a8a15366b08b16. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAA019700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da618c15989ec6f44ec7202cf28d69343e12bf48dac8d27c3e281ea2c8b438f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:59Z), 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/ZAA019400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75aebd8f9a78f60ede7c9190f715d48d12a1956393cdfdcfbb3c3264d62decd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ZAA019400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af50c9e70befe23027b142706b91cf02cfa360fe8a5836b9ca46afc4b6963cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HRA040645546.
Zlatne Žice Slavonije,Požega 1969.-2006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc56713721176c8d89ba1be1d0c768837f2c637d8a06b14bce24b300f54de310. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HRA040546699.
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 0x0223f54f183ef2e751caa3167f19a0aa85a31ccc4c67be58b04d5c2aa330f171. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HRA040644722.