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 0xbdcc528993ecc8d1616a1153b179567c19bc72902508ad70096a3a4e420bc9a2. 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/dffa48d1-b48f-4626-8d99-5ed8e301d641.json and https://artists.proofprofile.net/proofs/artist/dffa48d1-b48f-4626-8d99-5ed8e301d641.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 0xb7b5eb6666334dbacf032dcb90506a46587471e296671f7f67c5480a16480bfe. 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/USDY41964775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba4deb6e7568aa856447a0b5aa7120f9de3d43cb58a15e98e66e0c3c035ce2. 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/USCGJ2107241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23450dd5edf1bd2c9c5c343a45d873e0a3d6ebb65bf987a20f9f04603bbc65. 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/USDY42110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d305e24f07713c5482930755f6c74ff8aacb13a26675a84e65e858cd2a878f. 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/USDY42110118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ab7266ed469999b5199f8873ae2194e07c04f26121bbf0f0552d3c2370b44. 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/USDY42110116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5eb6666334dbacf032dcb90506a46587471e296671f7f67c5480a16480bfe. 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/USDY41964775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc5ee20e3902130e3b6beaec8f416fa00cc7b1253b0f9b52bdcdec25c05a5f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USDY41964774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59923b00e4bdbb3fde407e5c51e08e7abbf4a28188fb99371b242c3ecf0924. 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/USDY42015364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8d4a17a15065ec3f0c6553c0c99dd40cf31593e2ef66ee1c71a7415643660. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDY42066662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f42922028431f809920ecdf05d1f3761260278f0ac3acec29b1718beafe9bb. 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/USDY42066660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1eb55f4908bc2d2b2a7ad32e80afeb5e28ee15dd97214ea57803e8bf21b541. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USDY42066661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9eaf6f8cba80019146295432a91affeb70d5817d0e191ff4f2d586fb77e19a. 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/USL4Q1907429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928839d8fd051b112df6bacffdcb182ff455e7dfe090ed977337b8c8dd13b79e. 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/USDY42066663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141a9c0626d2a15b2d9af4622d377eae73645f61c9af9d23c24f2bc5b2c7e3d9. 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/USDY42066664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9261faace2925f588b6bb0dca6a569c1afa0aff29c30c9da1dec4b3e09f4de4a. 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/USDY41617693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de430a7fecd356b861741c358838994df91ff8490b20d20708db60a46448b24. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1723729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5207567eb0e5e666351a4482bf09b9594a49664da32cd847f8427a01f2a302b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USDY41617695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc79fc4fcad0ee1baba3eecd6177185b677a0f10061b1a979d5ab10b2041a52. 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/USDY41617696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45cfdb407b901563f1e449702740a0bcfb1f05fd3ec6115c9064e5f5795446a. 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/USDY41617697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d289e68cf3a98bc0c76711642101809604c89cd471853b9df053f59ced093e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USDY41617698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2e94c757a00880b800d4b89458c869d9571b7cb6d23025e3328feb4c5a54c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1797869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0322b202c0fe6db0c32be229e9f5388ff46076362bea51fe7b5cc82eb358526d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGH1797870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d76a19a14414b28249dd834b08040235f193bab39e182d424e74ce7bf0b1bc8. 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/USCGH1797871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b8a470f5d20b8b0966eb8e1b94b456ca69161dab0bb2eafcc451ea30097a55. 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/USCGH1797872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3cff1ae32de75e34bc2e8cec4c4dbbbcd60a6c98a4aba4c7ca4892beb930a. 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/QZNJX2459668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0df02b869f2bf35cc66013af03c9a8d52300eaf7aae60f39403d8a7c6ae517. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNJZ2377979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e618c4fde48086e5c3114d9fe9a6e1a62a67068639ae83fd2a3003cfcb818. 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/QZNJV2314256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e618c4fde48086e5c3114d9fe9a6e1a62a67068639ae83fd2a3003cfcb818. 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/QZNJV2314256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7f79345d9282f6efcddd85dda8550e033e73b86598c3f4fb26100c0c2524c6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2324027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a5aefb87f42195f95593fc1df04b8005faa69c030aadb6a0e880521970ad09. 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/QZHZ32286630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6491ba072717afb0f0a869f4c95ef86bfab4d8465174681797577e1c80f9c4f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM22179697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59923b00e4bdbb3fde407e5c51e08e7abbf4a28188fb99371b242c3ecf0924. 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/USDY42015364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13726315eeffc06a9996a396a133ef0f2c36f08fa9f530892191ec01c583816c. 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/USCGH2059102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9eaf6f8cba80019146295432a91affeb70d5817d0e191ff4f2d586fb77e19a. 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/USL4Q1907429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5eb6666334dbacf032dcb90506a46587471e296671f7f67c5480a16480bfe. 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/USDY41964775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14602c5c0059b2ac406b58eee5545128952d4a7378b25231717e5b16319af51. 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/USDY41963303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9742f827f1693f62ba3b186a7640509f8604ef2d9ddc452f60ad250a31d3a34a. 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/USHM91811515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b355b0fb2b475c0874b1c7a3715b4b2ce657db487138f1c72835f953fc857. 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/USCGH1771277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de430a7fecd356b861741c358838994df91ff8490b20d20708db60a46448b24. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGH1723729.