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 0xdc5a28a337b06a460a896047aad305c624a9e40415e84a2db1672676a3b07ece. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c9cef42-ff53-4591-ba28-3467b189ffb2.json and https://artists.proofprofile.net/proofs/artist/3c9cef42-ff53-4591-ba28-3467b189ffb2.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 0xe782e835754b7e5c5c0d4369657e4e736d00b78eba23d71b7c992b7c7eaae2c4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:39Z), 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/QMYQ51100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3050f5a74471f9f8764a185bac9003981259dca1837d7edd459dbf93dc8d36c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMYQ51100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b2fd453d6479d02946546d59160e424a5f0b1a12010a98a47af2c939893f7. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QMYQ51100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c289b9213d88286d899b28fd224e548caeba9266b81fe42ea1b88f66385274. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMYQ51100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6cc48aaf4ae730356eb9d1c77e51539774aa758050d9fd56fdf1241eaabd6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDQH2361375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6a471fee8b58e9132ec442568412523bdbc68e6afe0cff4be2135b1285abd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDQH2361376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1d38b9dd603b3be311db2e7b03934e72dda5023c171e45a045b20d92d2178. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDQH2361377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32dbf0c73bf1400ff99f83b04ff3b3bf5f5318a88235cd1aae7d18d2d4b4a4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDQH2361380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546fa7b88136d89c9754c4d5359ca4f50c7ac8092aa64a16cc90032deab15a26. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDQH2362563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb6db131836350a766465cca767e0f5a7e1cdfc928e9e22a0b782621deaaf7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDQH2362564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b70379fd24b273fcafe2e019be8d36bca33adf6d654b69ef9155baef604ce8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:52Z), 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/QZDQH2362565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcb115ec5bd46d47895412a258daf263f7419c04abd92e241fcd4fd10d2e250. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDQH2362567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd288d0a410d96d6eb66d3fd0e176fd625b8f71d3814fae22021cdff776cbe1f7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDQH2362568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142c5b27d44e0bbf395076d767859d0ddfdf616dbf401c44c68873984921f88. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDQH2364688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998eed24f1520293937e773efbcdb079976c42721286c93dc03a2643ad6b8fb9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDQH2364697.