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 0x2957a82201c2615b6f2e8a3dd3d89e94c36be9ee240e9fe34672ab14a794330d. 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/3e52ddd1-2a9c-4392-8918-1bc4fcd58ecd.json and https://artists.proofprofile.net/proofs/artist/3e52ddd1-2a9c-4392-8918-1bc4fcd58ecd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live Collection: Koncert Dom Sportova, Zagreb '98
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 0x00a562fe8ba08c3b1d0fa13823a811e5e01b50badabd39510863b5a8cdd5e4b2. 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/HRA231000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d1a50119c2ac87d2854e234fd46a57a60779532bf1ffe6a9c444ff77d08fe. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/HRA040527308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49a6e76a65f6281e4a6252467adb6278aeeedda8a191d57b0f5bdd42709429. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/HRA040618285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b731119a00986069373066a3228df08096d24983d2308fba73b801c3fca02e3. 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/HRA040627311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0704937215186168cd40675c980140f186d8878c4e0e4cd566e199bf1eedd7b0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:17Z), 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/HRA040629778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc777cd7b1be88f10f70cc1d0073009ebd71d8fd5d9d111a9e26ef42ab4556e83. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HRA040607048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3415d46afab0f0e8829ca76270b5cefcdc8a972e1e1dff12a6468e6e352fd2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HRA040752319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617d38d82873144e8d08c6aec2c9dc477e83642577a19d65c3ae0b4ab072629. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:46Z), 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/HRA040752314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7eac2d014442d6c7cec53a829ed6dbcf75341e674146f5ea71989fe5b96fa. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/HRA040752318.
Pijem Da Je Zaboravim Br.1, Najveći Hitovi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180479ddaa3ef9d4bf42d09b1498b51ebc3a6ede5c97e45f4a15c348c98d6323. 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/HRA040643081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e371f96815da6d5943feff29911380713a296a02d56461a1688611a0d958059. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HRA040643082.
Pijem Da Je Zaboravim Br.1, Najveći Hito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67edc5206033cd74289d598e6beac954a75dc53f63b711278884bf1b91766897. 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/HRA040620690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f130de1a4a16904b14c207a02babef3dbeb0a1b09922690ae0f570a4678a2b. 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/HRA040643961.