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 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 0x45e4e5339f41b209de0ff45afe765dce626400bbd1cfc6a2a5ba25d871d7bcf9. 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/cefda2a7-f39d-4bbd-ae4f-682b204b40f3.json and https://artists.proofprofile.net/proofs/artist/cefda2a7-f39d-4bbd-ae4f-682b204b40f3.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 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 0xa2bbe1a3be57a616f55b8f87e03bb240251f06b7e90dbd95bd8c4828a1b56f0f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USSM12000995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4544848b17e1a9686594bc3af060ad23497d978f0797022c0ab423a717863a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USSM12000993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cfe1352589aa991fb430ad2b764256854ee541c88c1022964eaafdd9d13ed0. 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/USSM12000994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5edd314b2cada162155868ea7b749bb4a92ddbc75b873c67637670f662e7d8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USSM12000996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0743d2f7fd412b216c4e8cd2ecd46003559b4bd7d81b23b1a630ff40b43e8bcf. 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/TCAIK2482714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b492a2875ee64e77b8afe683c1f3a2eb897bf934f2ffeef99e6cd08d218017. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ62368295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27d4e1ecbef2220d72a35176bb85ca76f3ded86281a597a44da9166f155e665. 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/QZNMU2388722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169abdb073cf77e5ba295bcbab9bb536e153f0c49aa582237372df627817792. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMU2394080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e0a97b469fc998bc7cd0e1eb76ed62935d8f54c8659e63b04a65e81513596. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMU2394094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a04fbc5c346d1757abf7d7cadef3b304c06e4c5cb7781040da0e83983097e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMU2394063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5a26afb0d35bac7ccb8be9c7fcd2faeca19b164bff3c20bf6af0575a08166b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72416499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff83e59cb4c5940486817590b0b17c30c194047e1b8a02454814edc92ffabe. 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/QZTB72416500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ade7721a813e155936c63988c3472248d7415b42b868e0b68708ddf4360c324. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2463620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85422b779f626d0f3800bf577fb5c0ef8cf86ccf4fb769df2575fbaab1657825. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTB72416498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5a26afb0d35bac7ccb8be9c7fcd2faeca19b164bff3c20bf6af0575a08166b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72416499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff83e59cb4c5940486817590b0b17c30c194047e1b8a02454814edc92ffabe. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTB72416500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a233553b79db394cd42fd5eb318781da2484c21c720bc325ed6a7537243f38. 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/QZTAS2440145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ade7721a813e155936c63988c3472248d7415b42b868e0b68708ddf4360c324. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNC2463620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74589ad4eff8e6e87dc22720d399f82b51d9d1a1c593a9cef794fc5847470683. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTB72416505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7772e3e8f66f6d7d736733c49c2bcc0582625942964051882d03220c32e80c. 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/USUM72022591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7772e3e8f66f6d7d736733c49c2bcc0582625942964051882d03220c32e80c. 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/USUM72022591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34ddd58481929aea02338a0f9bb0cbda8173fc30031aa5a54ceaf19f565ae39. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES52434304.