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 0x948c15eb316b130dd9265852a19dbb9af641ad8a4c0ece83d73a502099144e65. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a5b7ac3-3099-477a-b924-d1e5bd8f8307.json and https://artists.proofprofile.net/proofs/artist/4a5b7ac3-3099-477a-b924-d1e5bd8f8307.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 0xad19d074ff5aee8b0eb4c182af204a228dcbca9ec8749f5a1a75ec3b1e2423df. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLC062247763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad19d074ff5aee8b0eb4c182af204a228dcbca9ec8749f5a1a75ec3b1e2423df. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLC062247763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890624679a144010f13411129e1ef727c2ce8de6bedbfff5ffaf3f9d18c5a0d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062247592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df1f781c05332c51f60ce133221d14322f64a256b6fcafa59030c5a48600a1c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PLC062249544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc622cc5b76709b8b28817d1954fe55e88f106acb28ef14f3811c5c60e5d76e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:05Z), 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/PLC062252379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a00d5eeaf48c4ac3d6e8381919152b1f4de5706616545302e6586e425acce. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/PLC062254147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb27d320ef452cbcfbd3468fdd8d40cb3d0647d87d4240f720b6b76c7342735. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLC062255172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337621e173a3fdc5bda4f2997ca7cc13cd3487ffb6f4ed91f1c32b86e6e4814c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLC062255173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27fcc0998076fa57e7fd42506d3cbcaa0dc2c9cc3899e488b903a6b90f1c0ee. 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/PLC062255175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30980a9f1eacc497f947e61644178657df43d3f7e111a912e557c017303faadd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLC062255176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281af291a3c48182aa177c1e6e1c007bfda0486081c293aa81bd3127c9855790. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062255174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d7da6eb83f1b59f7bddc766a2f781959db6296e502c2986daac9c5e3ce7cc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:29Z), 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/PLC062257838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb9f37586250e2668ae19bb0fb2940d8d9edccae171a7a77ac6589f6bbe01e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:09Z), 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/PLC062258502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94658b579caca434f0c12cee2f978d89b96da0561d66a297f8ce5f58ff32f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:20Z), 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/PLC062362216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc13616272f0c55146bc58eec31405b559ce81b21ddd4feaf6ff11ec1605f78. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLC062364780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5fdc010f472b3d3866aedb3228b091517db1971e4674669925f58e30b765b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062373954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5fdc010f472b3d3866aedb3228b091517db1971e4674669925f58e30b765b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLC062373954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8056258102b6c0ac7225f7bb0dcd8ba074cd18c5d128a432fdb00ba51ca075. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC062376797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8056258102b6c0ac7225f7bb0dcd8ba074cd18c5d128a432fdb00ba51ca075. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062376797.