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 0x8206ae0849b2f7c789b7475a8bc23566953574c5062b12cf310792c9daab3e3a. 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/d5b75850-ba88-4fd2-a18c-5165f0d751be.json and https://artists.proofprofile.net/proofs/artist/d5b75850-ba88-4fd2-a18c-5165f0d751be.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 0x045960cf1a762d606b9ac4d10d7be4dc447255c95a3979463c91e977df85f07c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HRAA41700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc59195f472d950e210bc8c2273005ce01677471fe2f94ad37d1423d567b2f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/HRA040040514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db4ef413e284b5f50833ef3a7974ec202c38df4ffb616b587f56f292364328d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/HRA049430926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd858b83742700bf41798d39a1fa6c108597866a97972b79091affcd10dc13e66. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HRA040243219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531ca990c2e5f926ba5e721cb7274bfdd6c6941e647e6453a205efc1e554dd8. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/HRA049430925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581110ea4578556de119dbac696b4f9b7f6e6d5e62dece4d3b77ebe1f2dd29ea. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:50Z), 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/HRAA41700132.
Oštarije Su Mi Zaprli (feat. Ivan Arnold & Marco Grabber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc004286400455fdee902d3cf6e7a8ac3bdbb730bb0913fe49e91ee0172911. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HRA112570101.
Pušti Me Da Te Volin (feat. Tatiana Giorgi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57baa224e432b8d0407e92e38bdaa9e11eac32575c1bd7f77429c58d297653a4. 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/HRA049430929.