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 0x643c90cb4c07bdd80fb55d91343e78067781a6c30aeecdaa1b5d348625a1999a. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83b7d68b-9b32-42e4-a8a7-90d0d48c1e6e.json and https://artists.proofprofile.net/proofs/artist/83b7d68b-9b32-42e4-a8a7-90d0d48c1e6e.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 0x78f2bff677536ef5a8e3dbfd185cb1c107d51c91a3ab1180ee909963bf537bb5. 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/QZK6L2208641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5589403bc49dcd6d56d8f11382c1e8b524e710ab23252ef5f79ae3e5e95ed3cf. 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/QZK6L2208647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cb09c986bcf65080d20e692e2a76b85161d86dadf0b5b87502fb776e27af18. 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/QZK6L2208642.
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 0x65bb83210426bb76c6d54b6a699cecb7f6f36f81a2680c2ce48eb2d5c0cbf422. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6L2208643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c48acbc4d835f3c8f51c1d47f5d7bbee807ab844c79be2d4df136999c7e8e. 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/QZK6L2208644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4289f0f252726d9f1b9a70e581a0c1d48feff99213d3669e33ea93af94d39a8. 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/QZNWZ2467787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb047ba2b4839dbf1d4341955640b8a96cb25335c0d01890228fd6e585bcf7efb. 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/QZNWZ2467785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d294fdcdc6957db5af905270c6bd95fbb4a9b9de71782d3e305b1c62d6c6cc1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWZ2467786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe442c86a90358acdfbbb1a8963e68bb38c5f07fa24e6671ea0c4485590e0d432. 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/QZNWZ2169535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c83b2a70ae7a9355d1de51e748d65102f8849c64796b55ce9ec5e525b9a67fc. 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/QZNWZ2169536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2effdd4c2072cd91b697fa46f25ae6eaa7ae4216c7d998313342fc4a86ef4e3b. 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/QZNWZ2169537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d0b64a7bc1feb4f68f477b2399f7383df04de3246c27ac3fc7e101c0828d95. 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/QZNWZ2169538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6eca633da2287e257d79836667c4014b1e5070f474633fb293f08d671a6a2. 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/QZNWZ2169539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4129502329bbedba41d2820a999003cc5a1e3862899d5ec4366de6c35c05e2ac. 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/QZNWZ2169534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca4d37c6bf12841db3ef90b6132053368e9ad4b9c46e09b6f8883e1f399824. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWQ2034553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d32fe8e95859372327640db60924fb946868adcf43b27a1233726ce93bd1f3. 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/CAHQJ2165839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aedb976485d5b23ef627e5e5d2babe67e6447ee698b2f4d9e7492f6ab2aa49f. 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/CAHQJ2165837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd9e98b973bc2733a55ce1546663436a50b0cfadc8ae3b1ac5048fa96d18ca3. 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/FR6P12202390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffeb60931b3cef8f1395d04afa16d1ce5129b44e665c4c19813c2202350dc13. 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/FR6P12302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6300c4bcef75a1146b82bcbf62eac3dd0ee3c998bea03b83abbc325702d086. 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/FR6P12202350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffba8315f0ad790541a16fa698a3a78f76b0007c4a14b99d64ad85c13ce0c0f. 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/FR6P12302200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b7d3451a0b2f113fe819d2dcfb386a9b8660a81fa02c27cbc774608955f77. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR6P12302220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d89a9edf4b8624f5eddd59f39c745a3b756eb3117a7355ab4317215a81dbe48. 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/GBLFP2313104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a583d45c080808839b2127096c348a2782e6bdcc761754806cc78de568ab1c8. 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/GBLFP2313105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50bedab8d8beca19d41fc36a159d3488378903f892f07d2f69621df9f36052. 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/GBLFP2313107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ce04e0d3ab09525720a6354eee84a09a2241505ad6d66fe16da83ab383422. 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/GBLFP2313112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d34afdd2f36c0aff88d0ef92f635d7eff413cd994ff2c27a8b76d7fb8d8dd2. 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/QZZ762444579.