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 0x53f5b2c8ee1a363e24cf917be9cf5848d4c895294d4c9c95d232b66710aeaf07. 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/d7fde28a-3def-4f98-88c0-178e5a5abe6f.json and https://artists.proofprofile.net/proofs/artist/d7fde28a-3def-4f98-88c0-178e5a5abe6f.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 0x6e63c6b43a2196df90ed504a46284e6222dff76e1b9bd8bb8bc3e0c0d853a3ec. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWZ2051704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537d3641a2464647b7ce76485e087b61f00354c1f0c0ee9483d24e261c22230. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWZ2051705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7af7fa9dcf02ed9317f62767321fc0fc9e8302f47338bebb5990d3c1c6d38d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWZ2051706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba27fd11bbc7e70703c43c6ec1939bd4c974e17d177bab71141936a07ca798. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWZ2051707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a90faf73eebac6040323f345643e3e7cce986a0b2b15904559023c2917e80d5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:02Z), 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/QZK6N2160886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c949e3b638786ce34c3eab50492c945ad3f44f21f9153fb032ec0d5fac77159. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:52Z), 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/QZK6N2160887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b9ca8b9285714a184415acbb3d6e1441b7a0e36ab2533a7b5c0f359d9a2a33. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:12Z), 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/QZK6N2160888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703922cdee5a4e078cdbb7191f317d4aeab27017c99f520248311d1f4f4032d. 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/QZK6N2160891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49eb645bbaf2abf6355c2ad01828d3504d98cd7c625b1b26d02592575ca5dfa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY2281515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6489776fffec302ec2a142575905a3226bdf9bfad5441250a15ed498a93803. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2287851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b732a5298a0c838dca11061fc918af48e75225df6cb783d9ccdcc14e09c4b. 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/CAQTR2301528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e0134453c65c1ecddf28ceeddc888ba182e57557aecc4f1fd8db8459cc5d1. 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/FRX452441822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a34d49a32a453a94585a78501c67e9bfba4e93c7bbdc8b058b49f7291f8cb. 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/DGA052444437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491a3654afddfc05b68cb976ade884535213b551a5d6d5f472204dce5c67758. 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/DGA052444438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e0134453c65c1ecddf28ceeddc888ba182e57557aecc4f1fd8db8459cc5d1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX452441822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6800db0feee6a6c54656e07cbcc2a1b64dd5c2dac2b4bdf56f6cd941f1813e. 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/INO132200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162e2d9846d683dcab5c73ac3aeb08fedbcff59cc205f560deaae61fa4276e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INO132200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee50a0fd510ef6b108da3e3edf9f0c0afc18bd6d9c0f125dd2d7ae14bae985. 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/INO132200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d90ea6e9d328d9f6d269f2fb6458d1b35a37561c25498142bf8a80ae48a6e6. 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/FRX762212526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a92b8b11b89b5bae6395a2445c9d1f300cd3985484d6ab7c02c32e200e94d9. 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/INH102414467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f089973f97c1f9cf4b7020c304934015d87ec5807a0cbbd826042bf8072ba7. 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/INH102414654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf012feab5b29d28b25a480bbb7987052b6377688c72e625e68926c681d8a5c9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INH102413253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2014924a4adbccf52e26a8288a4316e0d937a80418d16b648f74986323a2e43a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH102413572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d3f33607413ad81aa233420cf77eeb45987b1ebdc1fbeb6854a1bb6511e0d7. 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/INH102414887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebee4f86057f56c0e3f1584c3973a81889319799429aeb121b2f0cfd5ddd82c. 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/INH102415111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec1e2391fbb1212ffffaa32b50a9a513e03b55c620fb3f52e32a614a0f3964. 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/INH102415108.