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 0xfa4445599027a9fcbfe409058ed5179ef8af1bfa390e210a6f3df8e74edbe948. 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/3a9f1cb0-0b5b-4636-b674-0f5940f3ddb5.json and https://artists.proofprofile.net/proofs/artist/3a9f1cb0-0b5b-4636-b674-0f5940f3ddb5.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 0x6a260265a4709b1753a8032069cf8d5fec5fafc8281d3e779685adb793122992. 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/HUMAG2020159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497c3c66f4f71f6e3116f5c242885f4459616fa8656f38a3c593e9a36d179174. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUMAG2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe7ab397ca01163ad21e289146cfe6b5ac031d4e21afe2716a248c96432ed1. 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/HUC141300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa650b1773b8448a24e9f3c38f4065f1b163e1b9f7c67e7652f3835559a9996. 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/HUC141300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d26f4dd61f2f13b8fcdaafc1d9066ce22b4ed3ab3fb146c544910a1fb0c8aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUC141300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecc2673d2a9ec0ca5da1e782dfe33726ae769ccf5874b6e500438dfa0133e87. 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/HUC141300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48296c81597530f9514e914935920a38d87b6e2da47557983e1a76c54253d1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUC141300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7a34a8a4dc6de7dbbedc26260ac085eec3be3785cae03526ea307ec063d63. 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/HUA612000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337bcbbb6d0f929cdf268b1c637f81face0f7001eb2308b718d6d6ead1fc97f7. 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/QMFME2078795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6be2098bd2fbfc54827352b011351cdc23cd86fcd61b0f9550bbc1c32c1511. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUAC61301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b745887e226e2e2a0532724926e4eda0fa5e11a868916633f9e5cfc1c9cd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA61328210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28762913b0df2224b3de81efdc765c5e5ebf03ac2f3678005c98df9a241274f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA61342372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce3610bae9238740ff564c1fd8aaec49938bc310ea415b3ce520e6ef0b3013. 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/QMFMF1487486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd25ea5b846557d0727a985c12f99be66f884bdf9bd437fbc4f90f8a505275. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUMAG1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d9723757a6b5a8293a2792d250cdb679cb7fcb7eed3e3eab36ec5e4a35690. 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/HUA0Y1800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a795cf36670acefa6f7b4f57a1dfefb896b2481f7c4d43d942f9f80e55ce6a4. 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/HUA0Y1800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e45dd8bb113ecf36b9cc31bd0b9df333575287bee1ef8057b8931629f266a5. 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/HUMAG2100266.
A Játékkészítő (Original Soundtrack) - Karaoke verziók