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 0x4a4284bbb63b66c1046491d66435f220f8cc30e6e3c60b51281afb889d0c5ada. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35ef4d59-6e2a-41ad-95c7-3b9ff44790de.json and https://artists.proofprofile.net/proofs/artist/35ef4d59-6e2a-41ad-95c7-3b9ff44790de.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 0x688b9d2fc6d525e925330762bff37cc5b1d2d85281b0c2b3e55a40150a08b38e. 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/USL4R2368609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5255c5b888433d74e027d99b6fe4f1bbc7c5fc54f1c0db631f8a7f10e3cb4fc. 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/USL4R2368610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8f46ecc5eb5fa13e16692b2478c218b5019580307452feb874c6d0cbf8d43b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4R2368611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfbbb1eeddce02416f6c923520ee7456a3a58318a66d181cda65e86954308b4. 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/USL4R2368612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3394c8ffc115d8a49c1ba65002c33ddac32c4f1ac6444be9a132f01a690307. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL4R2368615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a551eaf936fa6cbc082955082239713afe6e2d047f826362d7a57037643497e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL4R2368616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eedcd8d829c01d8b8d6cbf3bbfd796f0a1d1be7ca5ffe23da1814ab2b9d2a49. 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/USL4R2368618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d780897c526760bd166bbc42866bf5349545e6cf97741bf5232e13b6d76991. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USL4R2368613.
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 0x3740437e6832c883f46b0dab19d905eebb96f8728cd4ae2b3683b20a49f8a0fa. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USL4R2368614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb893ac3524cdf24604556ef7eef69f01d807aeb07a2394c4141187185c69fd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USL4R2368617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7797203465044f5ef76d5c08b0e9e4ede879784a9198a6b6a8f9f4d3bba21d8. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USL4R2368619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f03bdbcc8f446594e12d62b7d0c2d65a364f16284302fd1cf1d06db79b881f4. 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/USHM22032215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b0418c613d5906b4f93929949d617cf08b4e48feb03f10f84bca500954660. 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/USHM22032217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af47b52adece261de6dd36040e22c571e6ddc7c2e128ef4e7b5f49ed6ff18e. 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/USHM22032219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70fd85b342a5530d366b23e854b6adfe43ff4e9507ccb7353fd96a7927c192. 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/USHM22032223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa421188215d76bf2764103d65a3d16d32d88078126d28f37b504bd8ffa57c9. 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/USHM22032224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9d377bf003648f48f757692d677331e3d0c4bfda302a2a75917b8ab87bb1f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM22032214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b22b01855ba985951a518309b0d94e5ad1f9face0481462a96836093789ba. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USHM22032216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90066e704989c353d2787ee2bdb7edd748b73928caba18c64a0c0ad6320f3e7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM22032218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b05c288fd709257730614f07a5c5b639c97fbeaffad86ba0c4939623afa24. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM22032220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32420f2affa3e971cd1620776e4a04e035e0abea887aeb8dcd8edaa8859ef7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM22032221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd91b4e8861c7e2bf2d6bead9f114cf92f0f6c629f108fc223980f8bdf9e626e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USHM22032222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01eaee60cf4bc62664667d4b0c29547ec49b796c31d958f59f1ccb88cc836de. 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/USCGJ1700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94777ecbe015294c6ad09572828476ea3d290449103af8ca32a83cf18775f36e. 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/USCGJ1700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703c9acc8092e5094baccbb45b72ca5b50b3ae0d59de056972e81eeab03f4568. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ1700288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997def581680c7522b43a0761a49a33b2296ff5d62c098a3acab2f7e7565ee93. 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/USCGJ1700289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1835efed5d920f492b4244308efc4a5986b6b6388948d5f0eddb8bcb72dc6d. 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/USCGJ1700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e74e7c9c26de744c344e6c1a8ac092586814154c7a4459a7b442fd1e6b44de. 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/USCGJ1700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f9340719c15cb8600ff0ee5c363ae6a486877eb89263ce1039cb2376200db. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USCGJ1700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306ecd291867705e2714d9908dc4fc76f1f955a59b385b0c4a53cdbe0068c64. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USCGJ1700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac63643aa3914899f172341164594a8c24a2280708c867adf50d9d2137eb5c4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGJ1700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc158a042b35e3b5329dc9e8e52c0d465ab9b158fcef7ec6ce848e1432462f1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGJ1700291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362e2d68efab28a5b1b9214ae55fa2402222a94dcaf81e5fef895ed72bdd26a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGJ1700293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6275e996686143353d21cd9fa4c44823d64e02d63de375dbd6ebd96e9a27225a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGJ1700294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02176c913df38fa00092e72b5aacfbc7bea398d6653379e87da64dc40dc2fc7a. 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/USCGH1549445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4ac1ab7f0e08ab3198c5280b4d79188db0d625d05cfded49fc386e15dde32b. 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/USCGH1549451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e8d57d0236313519f010b72e933448b40fbc88d8651c363c1f6564064f595d. 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/USCGH1549444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdca2a1e340ffdd968570ad1489a19f5ad1d43cbf34052778f27ac4fcb5d2f1. 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/USCGH1549446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff1769ddedc15196cecc0275b7d412b6efae4e74a709e1443dc2f1b219efa4a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGH1549447.