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 0xf99ccf9f0b4351a83567c34414eeca2a1fdaf67d95f6ee0b9b10673de9ac2d00. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2273c42-ec34-42ca-8404-bc035fd95df8.json and https://artists.proofprofile.net/proofs/artist/f2273c42-ec34-42ca-8404-bc035fd95df8.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 0xdcde71b5d465ea1cc740798fb1304bdb438bd44cdd5df2a424a648b2af1e3f6a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRB901400761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db6fd07920fd6c00522c696a55dbb7647c773fb81691ed6f0e415a3f58c40f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA040648397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dbe9c5f38a0509d2f21c6bad07fefcadb9e5b5d859e56cdf01168fbe8f8296. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA040754548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f53e9345460f124851110530a4301427123f2fa3b2469f2f1ffe007a02aea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040750819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd292822332614cf8ef507ca366030e8aac76b72d42404a7041647f76ef3a5. 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/HRA260913804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10052747de8027caad274e391ba03a5e45169b8fd0e0847876f3694db67773. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HRA260913816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6da5fa0732047d7e53bb3f41b3f0b48f328690d1f55193e39a0265bee17bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HRA261321801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d9e649dd53e058060a39fd29a5404bc4e1947e21fe0d8227d702f19a6ad53. 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/HRA260710927.
40 Velikih Hitova - Klapske Pjesme - Samo Moru Virujen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660841018b4c29c8548e5257bc7e055ffa3bf989597c7092a32b2ce298203e5d. 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/HRA040644759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d67e13122c8afc49cba8b45eb239323a81c5e3edd86924c6745eda09101cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040606629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68601d822d945ba934b18f2fef6dd0af7d64bf8eb684b8f8425bf7148fa8d025. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA041166030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688a23e22023ecad4346c8540a8489ea45cb91ed823e0725f84e17daeeefd78. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HRA261626916.
40 najvećih klapskih hitova: ne damo te pismo naša - 10 godina (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a068993a5080825a6ade1290d6675d39319920cc29b35010b58529d28a1287c. 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/HRA260710905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4379cd50b288901ef5748aa49d8b49b2afa25b98d0185f254e6aca5677e290f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA260710910.
Festival Klapa I Mandolina (Opatija 2012)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee93ded0e69f9cc9b549e6cf93398685bcc9927605d885190d359e925539c32. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA111227908.
Najljepše Ljubavne Pjesme - Klape, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e7ce0d8a0abc4a9f12b9ac7468af7e29d686bc2af3e07c45c4e7b1ee696fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HRA041165903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e81e8a7e12398138af06966461f5c3425c429dcfc18c557741b92a4599b2477. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HRA049837602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b3eaa7ed1dba4c2b9e69f89a2468d76f8372aa3613d633eef47f7e89bdde1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HRA041165459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbf009e46ff31851ead20683571250099f4a5bee1c1455b57b5be7848491e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA041166025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e24fe33e356e60156bf118a9fe10467e52073521bd6223d6f9d784975d2c111. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HRA041266601.
10. Festival Dalmatinske Šansone - Šibenik 2007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe80d9c9b1e8daa7629ed2bd67a6203f50b34aa309ae3f34187753900a7f20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA041370465.