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 0xfe833a8e607decc39c2c62e0c15cba742c07ace4d5de49c92193d8bbf8c1e8d5. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e12e934-1620-46ba-a2ee-45b2dddeb8a4.json and https://artists.proofprofile.net/proofs/artist/2e12e934-1620-46ba-a2ee-45b2dddeb8a4.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 0x3f0483a4ec3b35009ef84fb95990e1ee2e9f9f00f19ab2defafe32f576eee4da. 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/USJ3V1832000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7ddc2cd450f2a0be95f13941c6c3dad870e85b49a46590d7e0d593f42a630a. 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/USJ3V1832001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4ae9471421205c39787a13ff0c50bade4a93af46aef892f7a710076ca1e0bc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USJ3V1832003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e41d083d7cab1d430e076b2366b627696d02cdcc50920c73f70e739fe9fdcd. 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/USJ3V1832008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13791eb7afdce64adc1c551a4b54cf7e2cb92b3eced6f09bb291bbfdff2363d2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USJ3V1832006.
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 0x4eb689e445158bb7915e1b53b6c42b5c5d37842a5e40ea39d0f715b4ec8a11b4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USJ3V1832007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acff9fd02efb7720f3702d783d6b2ea83458aba1b9afe467033de202a65f881. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USJ3V1832009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d57756a24ce198455a11bf7e85ed93fcee292dbe3285dbcd3ea0ccebae152. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USJ3V1832011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1a486a0296e2f33dca16f4c385a79fcd0e9d4bfe1ada6c1705aef4552abc22. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USJ3V1832013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559c16373a5ae66395bb8bbe64e32142ea6ae89056957f5040c56a66f776aa3c. 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/USJ3V1474627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789848253ffbda399f22312b74e94bc7580bbbf81f6a75c81d7151ba7569514. 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/USJ3V1474628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d157a2e25adb2fa8f1ff64aa3e0beb47b75b4a85662cde972d77d1ae5116e4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USJ3V1474630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ecb0e1a756070c0f933992db73387d57e8652be92cadc1f4f5e2fcc0cb184. 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/USJ3V1474635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf73ad50b5b0a56138718fed61802baa4ee64fca0db2dc44826965eca208e60. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V1474625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e74f6a2a6ee1409cf4acee14514750682058215f5231eb074ffa104aca244. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USJ3V1474626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2474603529e77b06e83b632272565a43f9dc4bf4f85cc0f9e1a04d28ac2b30fb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USJ3V1474629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be48a05d06e097e389edacb0e0ccde68c0ebaf1a53ff915c8d22abac7cbc851. 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/USJ3V1474631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7adeb6a25fcb4bdd11fa1869eb91efe4328986e4564b00599cda48883d746. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USJ3V1474632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4a1e33c27870ad5dd7308bc610213c84b6ac1da6e7e108544b1d12de339305. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USJ3V1474633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386dba3f2c83b223d7875c612545577f2ab9e90d730c1a48620b6ac4ec19128c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USJ3V1474634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97d59e3725af7011031fc656963b465927f7d71b5aa0c5824e585558eeda15e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USJ3V1474636.