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 0xb3b3afa46e99e725baa3c9a68f5430a5de49a5cc3d3136991d44d912d7c5aa24. 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/8f37edf5-214d-4976-a667-a8b4faf9b5ae.json and https://artists.proofprofile.net/proofs/artist/8f37edf5-214d-4976-a667-a8b4faf9b5ae.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 0xf1d8a1cc728527f78eee64ed3772479dce759481802c9f5f4ec68f044c0ab497. 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/BCA7I2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b57e2cbffba4bb5795f9910a991dbce4cf54193cfb6a72cd003a567aaf64ce. 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/ES18F2300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bda788bb1e269c93b4a15242ece8f34ab5b02e591217cb748e1b98483e16df. 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/QZNJV2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b4992b5039c99cf571480b4f6f747323081bbb5f92ae01696078629002333. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES18F2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79510fc35935126e309a4ff003b60b86cf36a4f2c7ef266af4ba86371dfb6d4a. 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/BCI1D2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53981fe906ff6a6abcb76be235afdf894593d5818799fa1991d2884d6d8c7e12. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZW9M2420521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b451a7297ed743bbcc06aa27501c45e0bb8eb1a0e1730c91f536da31f5f18. 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/BCI1D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158f69f5efab93622ce84b6cd81324d90f5482eed654ca1c72f40421c40d859. 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/US7VG2576217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092779e61ebb9123b6d4bdd95a46befa7b5fd002662f67c67c31e5c9a6f895b5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BCI1D2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cda03d129a2c183d3e1f5805005a9cd35147e655716e1134e737a2e8909fa32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US7VG2556907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015108c3de8ec5362a4cf08e36424fe4483cf12967642e17376ee703cfb17dde. 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/QZGLM2511317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412abf272c091ccce4bafee9fc7f969c4464f9d5089828eb715155bccdf8c59. 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/ES18F2500784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44f5d7db65b172b76132b62a88957a8cb1061ff716201439ae6a028404b1eb8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMZ92575463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfde251c52761b6508a5d8566a4b7ce12094a40e629bed8bc5074703cca606f. 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/BCI1D2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa5b399e9c2d8e9bff0b7d45fa6a60fe7f343af9d6584cb397b0368453c1099. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:06:57Z), 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/BCI1D2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb91bcdc2c243c6528ad748661bacd521603e85f430cfe0cc8275439440ccc. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BCI1D2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401abc59b120f3c6b2dea2b8e3a12b92aa20017139b04f36787bddebd1cba6f5. 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/BCI1D2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d91f3e5df5434229094dc28831cb1e52188fba740ac1aad133addd226ca67f2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNJW2440399.
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 0x5e79b2c7ee0e45f9ecd0225cd0fd84001c64f16dc6d5b074dd65b7ed49b580bd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BCI1D2300001.