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 0xd8f5ab6ea8d517533c6a552a602191258d60c745fe24399fd54c93bb195c97db. 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/5c586981-9e9b-4162-a1cd-9fe495bdce86.json and https://artists.proofprofile.net/proofs/artist/5c586981-9e9b-4162-a1cd-9fe495bdce86.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 0x4ca6b7a441a2fae2b7fc73f58fa28492ca3b67b772eea90794e6f35b4c6fa556. 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/HUMAG1400304.
Son of the Sun (2015) [feat. Szerecsenkirály]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2c902f14898a84cb2c5716043cef5482ea34987de82eade3d2ce340428ba60. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:24Z), 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/HUMAG1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1f459ba86bcdbf43aec0459b09c1476099705b598e0bcf9745a31bf2116709. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/HUA791700204.
Odafuthatnánk (A STRAND Fesztivál Himnusza 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f93a70f84a59c335846236cc47c69e1c4133f7252eb28fd85b595ff200fb9c6. 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/HUA791800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc359de60aa703ff5723ab33f0900e96cff748b42a9896673f46ddf4469c3703. 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/HUMAG1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653e40e67cc5a1323080a0886c0ee165e6be4d9e9068a9bc02224c3b10f63040. 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/HUA791800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e223fd58deaa90d62b48912a58e3a827312588d640cd19a2eba7771607bd3c. 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/HUMAG2020384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb906d198e2b43e3b8379be678be966195093a64304d3699bd3afef507d5d0f. 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/HUMAG2020389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa809ec601588fde12469e90d5714eeb6ddd1f6403880e6fa2d10a35112302968. 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/HUMAG2020390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c29031e2a33da441da78390db719f5d799326002a2f3d6a220a527d177444a. 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/HUA792000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8055d49e3a186edcbd8cb60b5903241a42329434cbcf32eacede9b6050d54cc. 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/HUMAG2100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b821d8d95b8137fbcd086beb90385de3f52df3bb64dcbe26dbf2a1e2de2f0db. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/HUA792100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0bb7d4311b44021a34e11f0ffd2819cb147e96e332fd4b4225e3f5c854ff2a. 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/HUA792200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa2f280301b744e12293020fb26efdeb135fc3bf4c53e1270cf1f96a222514c. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/HUA792200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf694c381fad9b254bb1b5df15f5631929d91ce2af58e866ae2951095ecf5a9a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/HUA792300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abb6aa8cfe8c40eb6f5781862313402616e07c01e47313ac60c7dff5b22fe15. 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/HUA792400040.