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 0x9da4fda8d0d41db006f0da08c9ed989024acbca6716df41f072514fb5b030d2e. 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/eef80750-fe5f-4a3c-83d5-03a37de4b53c.json and https://artists.proofprofile.net/proofs/artist/eef80750-fe5f-4a3c-83d5-03a37de4b53c.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 0x10b59ecdcee5abbbf99a2f7ad3c748ba0c14b1bb298b4679c4ae9916372c90e1. 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/QZNWW2051354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231eb88c95300ba9ee9d597e0a01bfa4e2f5eca2770710993bb3daa876a11dda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTAT2162737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee7233e32fb1c7d8b64ab6f78062ce1c6424212734cec13470c233f2773d145. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPLS2157363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593da0e2feabff1bfec41655a6043242ee22d2bbd837cad7aca3547c089eca5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZFZ32244255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e36e7462d06ef8be7e5bbb08757c785c60f2e704e59ad7d45d3ebe2b93f8b3. 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/QZFZ32244257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e8ad40d2c33f54c7c943cc10ad33120ffb7de763751a299666198fc558fc7. 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/QZFZ32244260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6690aa341f292cbee506d6868ca631a262d6ab5ed28f8bed7566a4a7381593. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ32244261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bfeff88c88d0f6000a7e093279e7bf678c054842e10db11f33645e7380503c. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZFZ32244263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac2f85c097d4a2ea0ebcac0c70da5227144ee54043f2929bc40e16f699f4b3c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZK6H2274417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09ed5c1e6c43be026bcab744b2f9eaf9766f5f54b3c3cd5c1697bac602262e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZES82388850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d90d28210e3b0913665a243b29b34959b117a4c5f417840c91852c247706cb6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES82388851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b57ed5b7efe28b73272509520abb776c14357ed3700034f831415524b681e26. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZES82388854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776fca44c4b61d40d55cf0fb57bba8b5e5b63a801c1a57c836b4a1edee0f569e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES82388855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cf18a4c289a888dfca6cce4269d93a5065cfd3d991d4e7bbd2363667a58ac1. 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/QZES82388856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534c6d771c5eef991c02829ac4e94dea177216acf623560d57eb316cfb4ce355. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZES82388857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b0f2960734e55f85a316dfca55e32ca240f7e16b6801548769e212d4b24951. 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/QZHN92399074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac9ef64bcd39ea5c5b24e35a743b76695720f4a49fc020c73993016d0036384. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWX2304275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec3bc6bbe832d1d8508cb4399672d7c70de2619f7472df4963d9b15adbeb535. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWX2304277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89892aa25a754742b4e8a91ecd239ff15c422f55b4632979147434720ec1701. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWX2304278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5319798f8ea7b4c3125848f36d92370add6a75ff6af91d7add4556be744ad0f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DEPI82326592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966fab4ef20ad0fbf63d42fdb867d5619bf45b21e1a34191af6e5723650eac1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEPI82404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b324132b4ab0f22d6253a38177722f149b5c497c94a1b74f28ef805a56f06. 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/DEPI82439882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f0beb93c6f3e10649f46474660783d9c9524fe256b9881bb930503fab40f8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEPI82439883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb24f91787ce2fb0abb7d021d0522018601ebf7addd3c1783751b9f916551c4. 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/DEPI82439885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46228e9f7f5438a6f9de346a29e7d07fb75081389ad1605a1fd62a75b5b7da65. 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/DEPI82439887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d1923fa5ef87bb20d3d8690799696ad2c2a716a7eaeca1a32ef4956f4daf9. 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/DEPI82439888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be0d34af300f3ccbb1a1645ee5a1fdd0d90a565f3e36f02cbdf0a46f6b4f8b. 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/DEPI82439889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15471d7e377b206abec2f188d80998c41a3e2ae0559fe0a4078767ccd07fdbc. 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/DEPI82439890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a405b3e3dc3000969b444afc77004f8dafa24db60eafc95534c9d648d3958. 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/DEPI82439891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42b30999678bd27c9f55a0f24b20eacd9dcd2631f1ce0babef88a1d3b9d201. 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/DEPI82439892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0363b2d25fe002954186607794ed507ba51130b99c3af43a56f8beaa44b642f8. 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/DEPI82439893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fdfc384336c8ccfe2650f738cf60ac194e009e230e7189b0bf23c0e26d5aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEPI82439884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee7e7f86009fe5a9e3ce41c5890d7c82e641da299add32c71bb46a02f4fc720. 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/DEPI82411006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966fab4ef20ad0fbf63d42fdb867d5619bf45b21e1a34191af6e5723650eac1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEPI82404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665990ad8d06cf169a2cf6f7972c75a929e1db1ff2b14c430a9c2205ef23b2c. 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/DEPI82419147.