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 0x6657d39acc42cd432004dc71e68844582436ad6ba5a75e2aa8a92532ae1d3647. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebf2e76d-dbf9-4290-9986-70b0b3281ee3.json and https://artists.proofprofile.net/proofs/artist/ebf2e76d-dbf9-4290-9986-70b0b3281ee3.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 0x6f7e61e6ffea9bfdb83eb4be62ba2cccf9ca031bac8937ecb0f304a6cb756a4b. 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/UK9AV2101842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6015d55fed6019c95265b210fdb5a1b9a8c89e823868699341a9cbf2f7df7f4f. 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/UK9AV2101843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9df5e19e47eeda450a9667ee4d6bb11db11e8e699dde8b609f232640a07006. 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/UK9AV2101846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4847ee7bc3d61724ea0538176e177830bd241dd96bff1586bbb47b3c6b6f9b0. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/UK9AV2101844.
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 0x301347d78801f37991c7f8758f4f67563e27e24edf6a64b7bff2fd6f3fb5f16f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UK9AV2101845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c9ffaa632409b6dffc96b03a60df8bad7e146c03cd9a71682c8482e3fac967. 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/GB9TP1900721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834f406f74509a0c0611e872c8b4063beeb07c9795cdc408921f1ce5f4eabbb. 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/GB9TP1900722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec8048903fe83620a30847191c86aa10bda5c8619ff2444b621df311ae71b7. 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/GB9TP1900723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd005fe0a09b097b20d6a2c8d93daba153c4e656ecf276b97bacbcd30e6624cab. 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/GB9TP1900724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30400f48f3ecd3f0fce6e8eaade0ae5deeec4a23c2535c9b1a5354121bdb6be. 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/GB9TP1900725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8510298fd300760251bc973d6321f70e51040afac79e2d93d1d553aecd501583. 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/GB9TP1900726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe1b36126e1bc7a68923d3c48bf676da34cc075484c137b810be1062eeaafcb. 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/GB9TP1900727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47caad7f0a1943046b29fb6503cac1f75e9cc6b37d9b867bb477219bcf03937. 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/IT3GN1500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed2c930c41f02bad9bd95fcf7851fee5656ae6cdcbdfd025282cbd79866974. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/IT3GN1500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdec815071bf27d3bdf56e6cae14f88150ba04073260c263b942c19d6887092. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/IT3GN1500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945074e87d5c2654ca9a800424c59d73c162e321c60cdc7fb52db2e8fafaffbe. 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/IT3GN1500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0601c6d2eaeae799f92ad20ee9f1eb43ef2bd54d9ee000d5c03d36efdb2e88d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IT3GN1500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3c4b1f3d855cb1517d32510aee2235cf5e834d231f03c76d44244b62957c40. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/IT3GN1500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3fc403c6c7a59649d57830eb6c8f9aa15366cf64ed9b742602d0717928cb15. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/IT3GN1500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09c6266c3812e4bffee0b4caed0bd4ffc11aac66dedb12fa86c57d5c8693af. 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/IT3GN1500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88644b841f868ea0d5695a5ca024a9ea3a2af39c2f570a523b02a775bc18e0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/IT3GN1500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447334c2b4b9ec8988b62b0b46fa21a3183abd563763269a95a23efc8686062a. 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/IT3GN1400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f297186c006420946618e00cd989c35c24ca0281b55073c8bb04d2ad8f37634. 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/IT3GN1400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645d1ac49847f5e40bdcb4cb3c63b154bc82df93fce62167ffae81548f76cc1f. 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/IT3GN1400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5680855de45d3b99219a93085720439668826319ebf5251db6a28dcf77abeaa4. 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/IT3GN1400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5f0e695d0894bc7b747511837dbed65e2316badec5b4622bf69595a4d97ef1. 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/IT3GN1400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f72a4a211d6f7d440cf744c354964af4dd10d0ecede7a0ea6e0dd7bf515739. 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/IT3GN1400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b6ce7ff2afcbbc0671dcd9a65e07921629fc36f2e892a7cc8b207fe848f987. 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/IT3GN1400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f6f1a6dae25d5d6cad3cfd5f6f7efaa78882e06aa3c4608a2367e18b4b354e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/IT3GN1400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3f18d3f50cb3c942cfcd20250d1f63ea4e01665c05732050ea3271fcbba77a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/IT3GN1400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3d289519f369382fae5f3a1601d76205f44a4cad67344e3f62e444e9fb92d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/IT3GN1400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c30bdc5993177fa9bd4e7bf0b92a77abda037c5d8459d74c2fab3a2aa7a6e6. 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/IT3GN1400063.