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 0xe4973431fdd12f793de9d93a6addbbed8c2f1bde6b10472c00a5256c09de3ada. 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/16a370ae-5ca8-4585-a302-083a3f42e681.json and https://artists.proofprofile.net/proofs/artist/16a370ae-5ca8-4585-a302-083a3f42e681.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 0x579482a5cf2f93867dbb22776a0bbe4c4ebac365944a2911aa893f66270b9c51. 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/ITB551714608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84312e7ccd5cbc1c9b0f16be91e2de0822e5d7a11a2d2af3dd799a7c544de7b0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITZ041800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e64e56aca672ace0de550ee759b3e072e5af0128ebbe9ef3e20937f005462d. 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/ITB551915627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfce5acaa0476d7649a1ddb0414359567a9a51343a75437d8e7792737f4afd54. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITB552015891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88464eb01f88d3b2c18435d5841acb4dedd4e95978e0da33c565aba8b051400b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITB552116524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf75d421cc3767be32bf2deb51f9955340b881aeffb13de07cab25678718b86. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ITB552116552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef8be05d67fcd3d92b6bbd2671496de94b09ebcadef0e96111dfc9cb78d1026. 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/ITB552116553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed19666eb75ad5fbe637b7537048b3f17c5207770170ad6b8bc970e5d7d754. 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/ITB552116554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf75d421cc3767be32bf2deb51f9955340b881aeffb13de07cab25678718b86. 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/ITB552116552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88464eb01f88d3b2c18435d5841acb4dedd4e95978e0da33c565aba8b051400b. 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/ITB552116524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeea502f889131614f4f21b06368be0f1aafbea1feb00f839f1c644864c4c21. 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/ITB552116556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d358448dec1b6e1d6353422f98f78c2b889260528baeea889cf94e21e2cbe0c. 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/ITB552116557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef64ce4fe4dd174088e5236c8d94295add68212d6ccbecadb8dbecd43ed973. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:28Z), 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/TCAGQ2203426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe573d333eaec3a4c39473ebe0930668a81ef2e45177ce12ae311f4ca1b0101c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGW2393144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93ee6f8e22c856d796bb4b3995667f269f5100f44c2f729a31c493cbbd1407b. 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/TCAHL2301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede8d3b62059e3679f543d8243e1c6138c6dbe7ed2ca231462bd38cabb35000. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US38Y2310382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad64f5f18896ac835e2033420eafdc76bb5d33e27bda039a8eb5029216e2dab5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:05Z), 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/US38Y2310383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70376888542440c41ddd1bb5ee20c86440dd9b98000f42a76204fb6bc7b6ed28. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:56:53Z), 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/US38Y2311007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876db76ced0c5c7fc1c5d98a0253bab6ed1987b3e018c5744f4efef01c744c99. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ITO952200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f84e170a6a9e751ee01af07304b065ac4e339973f5d8497517c0dd9bcba38. 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/ITB551915521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c554eb01bd2caa43c74567d1214f3026bdf2779cb99f21e449a28d5ed7a3667. 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/FR2X42262399.