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 0x2d0f3e3c0e178521e97e95f649e9d24a3abd4a47091f1588c0b8369c58880860. 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/72da403a-d5fe-4df6-a85e-f1ebc40bcfe0.json and https://artists.proofprofile.net/proofs/artist/72da403a-d5fe-4df6-a85e-f1ebc40bcfe0.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 0xae8736cf4328d01c92897538ec6c645bb8a6cbb67f7288ed4b5f33c5217a2f32. 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/QZARB1808032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3115cca4caf1e956740528297dc045f10389eae20b413d66afd299a0702b3e59. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:30Z), 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/QZARB1808036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c79b1049e9ce425d1a59989e09674d76a0c2fa6517703aad12c20632ca6e671. 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/QZARB1808042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6451dfa4423f097759389d1531bf7b8d1635d1f72d2ec5435be181e176632f8. 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/QZARB1804218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958f8946b6c578cfea3eec2c719623725c90371d13a646dc25d546ae476eb771. 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/QZB4J1896728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe570116ac739909087f7672c4e196c1959bec34268df6dcafb5cabb2e244837b. 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/QZHN41937477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c7ddef8e10cd5e3b035ed57bad8e42ffc8c0809a50c1d4034c7a5617a2ef17. 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/QZHN41937478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d80d859ea8ac1f627d6b6baacd25860acd300ce54085b8c07cf47173d5d81d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN41937479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e69481f26eac7b2d9548f70d0e5a925836a8a5d4ef2e94bc830a2f6d2d5b052. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZHN41937484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14708af5e94bace864a35650e0449fa9c412bc71660c64cfd67046d1587c6c77. 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/QZHN41937489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960c8294b483ffa18abc98af2a4fb24649c11e8ee449a6072deee33a632ab0a. 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/QZHN41937492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f82acd4aa2792deff0c56d6c7203ee6d071b7924b660f75510a14bfbc0e6c. 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/QZHN41937494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5262e664e2547f3e03a7ab0246ec8292ca8a5b0a738234d23e77d10d77a00e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:34:41Z), 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/QZHN41937491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902f9700cc67df9c903e8f22ddc4fbec79a52d11f7f06aea15044657454f0a4. 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/QZK6Q2018059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df0392d6b655ca2bc32fe1ae3788d934ed7c5278204650a45476ba2d0b9817. 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/PLB382200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df0392d6b655ca2bc32fe1ae3788d934ed7c5278204650a45476ba2d0b9817. 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/PLB382200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28224766d04ceda56b10f94dddb16565051fbce93dc758b1ab4b4b28726ce660. 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/PLB382200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2810becccefe4b3f775aa573dc13fdcb099f982037c9435e522d021fdafa1cd5. 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/PLB382200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf717622a3f119ce452c947a3f8d5c81553f4a1a358c8bead1aae743e2b789883. 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/PLB382200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe381029f962a1c42be3c227731f935dfbba58a102c3c591457f0aaf7fe1b79d9. 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/PLB382200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ca00ec863cad7672d85421a4730be46c1f084bd430245d131ad0fe2e1aa412. 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/PLB382200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a10485c1ea420544a0c45badd89c0a696bbe1b662fe69ef4a10809745601c. 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/PLB382200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641f38d3fc6b79d236bb83c79dac837f7f926193dab0d8c46e1d697a7264965. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PLB382200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673bca4f422aaefb545cc2654729683cc1924e1f21d6e992d7cbf1445f8bcec. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:34:46Z), 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/QZTAZ2455194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a717f84449be0892e076f19a46e895966dea51b2c2b387026674f54eb204d71. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:29Z), 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/QT3EZ2483212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdf1b905867d364db49da686ccf34caa53f02c5f306256543587eaaa49fac5c. 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/QZFZ32578723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe500431b272e66c09c1af936afe7f6f7887f100036988ad2900640c0f435c647. 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/PLF241705643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2897b4d9f7a11b4f59c111fdd310879975b39f0a8dfd19852a07d77725d4ad. 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/PLB381900149.