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 0x4f68afe1949564517304ebc3bae646007f867043cc0261d7d7f25cb853915441. 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/c0a92b68-9102-406f-a4aa-d75e0232315a.json and https://artists.proofprofile.net/proofs/artist/c0a92b68-9102-406f-a4aa-d75e0232315a.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 0xb82c244516a85f68fb48e1aebd086779aa1edb8a8b6f4b88f383f2e59e649253. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZBEX02300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20199e9a08428581f05dca28467fa6da3fffacb154a257d9a52c2692943783. 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/ZAUM72400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6fdfab7b393b30c5827334f9b021eca65f131ab5d5640aa38d0ae69ff1d4c0. 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/TCAFG2078741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34824ae84adfc2c11b2cdcf4b91a223cc490cae827f9c5661a43aa72b0dc4ed0. 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/US23A1577782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb271f595724dd9a1dbe681e5698c2ddb93bd65cf9fbd31bb70a1cb4cb399f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US23A1575044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dae17fc668e8a8c16f8c66bc9c6112dfb14721df6bbd36cd38e2ee7792b665b. 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/ZA7GA2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d72fe3a98a871f86f409db09cdacdce81e741cb20540196d5fede9545c8f3. 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/ZARVJ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d903c3be25b58565d804bee577074cd381127101024965b95f43f627595e04a. 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/US23A1584652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5bbe26eabc0b3894ca61c049c5142e429d197e5f13d4139a6df8c0459ae0d8. 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/ZAC012400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0046d90f590b1abc72ee20c1d5e7d6bbe5ed8bae99e29ae0c200d5ff9e7b977d. 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/ZAC012400421.
Angeke (feat. Kammu Dee & Semi Tee & Ntokzin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715046bc11d652da6c24c4e8b83d1d335f6a0863d8d49f39b711824fce16ed39. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ZB3E42200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338d6cc3dad2b28435f94f74b8ca12df368908f0d9295651e5bfe51d953afa7a. 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/US23A1570959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1bebf58fd1659f20b66b8fb1150cd1148631ede6db9029b234e3f2fb83e77. 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/US23A1565905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2938af0f73e44f80979ca7276e8c02e33d773d11fbfbbc49dd36111970c0c3d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US23A1570960.