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 0xef5f282793b5571556fd62c667a64c1cf178b54a8d4d9e3892961dbb9c640258. 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/58abd63d-9669-4ead-bad2-1faf45dcd0da.json and https://artists.proofprofile.net/proofs/artist/58abd63d-9669-4ead-bad2-1faf45dcd0da.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 0x13f99aa9ee908a119e6ccface0f1fec22d6608ca295b18b57e1cc62b24aa1c9f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/BK4DA2501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0282f9d21a27b64e0bd824715997300dfd13980e58f25a012b0a35489371ef1c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:43Z), 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/BK4DA2501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19bdb610f0091af0effe4d09229bb8c814483b81ae4d3bdea7e2b97a9ddb949. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/BK4DA2501589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92d7b28ea07e982ae905d9e75003bd54926a749b3aa2d4f397d8c39e32ede93. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/BK4DA2501587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157288f17fae2f260786bff5dd8625997d559081eeb504bb7410c3a0bcd4015d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:15Z), 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/BK4DA2501585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3934a794233c942b73f30829a16b999b753831f6f57204f62dc9d8f5464cd6c9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BK4DA2513187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1b3f967e9f080161883cde0b60c0c26ab45e077e51972bfe96ae67eb498d05. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BK4DA2513189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df2f680e827603718da1e289880a0c8b0eb9cad15942ac814e0a170c38c2b4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2513190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f05b69b14cbfcc3e8346be328fae1c048b80a9667b7e3c4b4095c50b7c93fa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BK4DA2513191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5fddbf198dbf81d0c3ee413cc0a7f92231949a20648f536a1863c90bf0aa41. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BK4DA2513192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33766e3c6a46d3512cc75bf9f22ba00929456e307a6a2340477abf67327f25d2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BK4DA2513193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd97f0bb9780ba18fa07c02e046615f8e4a53ede7d3c1aabec2cae8684f5034. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BK4DA2513194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e12d58dbd3175380bde1da4a20e4e1f91a8e05b9df90037100ade5a20c881dd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:00Z), 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/BK4DA2513195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311581ddc0e0d1e62a247db8a9d408e1e53c345130edef91cd8468a2bcfd4522. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/BK4DA2513196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef52557dcb3419b2feacf00ffb2bcf97c843ed790c0cbed6d1df1cecfe7902. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BK4DA2513198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72af8bedbd4a37f3afed444a473373dd063fc9c0f77637f350ecfd107ece37. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BK4DA2513233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6db5524d1d3c8d8b4caf85c760ddc8e1efef0a06f5da87cdf61c960bd2b66d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BK4DA2538306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf30987a9defa255d14416986124329079506990171eb6cf77111f078e89afe6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BK4DA2538308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42b41f0fe32a7499a5fcf7d60667e918e7a877eaf8fc3f9b1b90204d55c39ee. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BK4DA2538309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474b3a5bcaf95c8311fbd4811ae21a93ad32343da061900308cb7039e40224ef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:07Z), 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/BK4DA2538315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fc322c762e606e5ed166d48f90ae209c55e21114d5a7e83e00b348f097f520. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BK4DA2538316.