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 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 0xc2b5ea05f20985aa89cbb908d25911f69c623bb07e91ccfdd61585981680b349. 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/6f35ce65-cbb7-4baf-92e0-6ddf14d4121d.json and https://artists.proofprofile.net/proofs/artist/6f35ce65-cbb7-4baf-92e0-6ddf14d4121d.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 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 0x61130697ad169149276bc012630d15ec8ee2fa4349ba348d4a9ee9c58be4d44a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HRA040626082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8288be3be1d05684277af65572b8d2753b456079862018f9a248c74bf519f5f9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/HRA040626084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e307b964f5508e8bd0ad2862e5c580d94703a69c3e4d281f1ba86c012fa7d0c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/HRA040522606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d50237ea7ea59d7928b1a1ea2d06592e9408d076666bf4bbada5648eb99bf9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HRA040622612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1423d4c28f59a3535e9be6c42f769fa4268968338048fdb28fd33bf4676d6a49. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/HRA040627016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cfdf4ade9a59d190ec337f11bab8fbd1fc44f900127301ab77d463b826547c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HRA040629491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a97644baa04a97b8d1f2050c0f708a5ccc3ceeb00e6104153bc583b3af13064. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HRA040611255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41911954cd9bd1889de4d05fc5480f98c2a92b4b1216b9972f56449bdec6809. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HRA048805536.
Dusko Lokin pjeva najvece hitove Tomislava Ivcica
Duško Lokin Pjeva Najveće Hitove Tomislava Ivčića
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f7f097bc636ce9b08b767d27df7cf25bb86a3c13adf7a09159c69cffcc5ce. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/HRB901400987.
Duško Lokin pjeva najveće hitove Tomislava Ivčića
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa923940b94c973bd2874b0880cc422d3ccf9963b265d208ca913cb02d3577b. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/HRA040630367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921a4e90c1b689c1ab4707ef544736aef4c90407f8b2350cfd5a79af6bac0b9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HRA048819432.
Htjela Je Noćas Da Umremo Mladi, Ljubavi Radi, Ljubavi Radi...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d3c6fd04aa3ada8ab4cc59f30947c9d4fc50e2b96f3527073243fca8881374. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HRA042501478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c654f4f44b5a9199073a050230dfe80bd9d33b1fe97a4baf94fae5352becdc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HRA041889202.