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 0xe5316bcf82abcef20a455fa5f63c2ab22e7235cb6085b95e39d9a169ba742d29. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f5e9e62-d26e-40ae-b994-01a6aea9d950.json and https://artists.proofprofile.net/proofs/artist/7f5e9e62-d26e-40ae-b994-01a6aea9d950.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 0x677329e00df27a54945054df97cf74095fcf265a230fcfb15c9ef2a680ef5632. 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/QZMEN2151079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb2efb052bc98c86207bc9cfe0ec99bff5030cfde1d6e5cf0d5cbd6e6678bea. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZNWV2142543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d16e8033eef4b08e4c0d9ebe2f3e0676c865ea11553a38b2ad6757b5a1debf. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTVM2153709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d57e51e5464f1649a8b8fdf5cc4d27fe7a62f84b0f0ed1f4bdf314af13f9b11. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA72200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8358da4a026ce6092d50d65a89b0a7b71d5023e88431d96f9560823862d14. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES62291117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4a62f5322b1ee5e77711f0d160c379f6bd34f101ce3c72a1422c3b6b716600. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES52563708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de9c5d551025b9f0d0a5d0f7f6d9479204bd9b96c29c66b88d7d7b8dbeac98. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZES62542002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413a4acb850f1becd45c4cb55b03f9671740e0414c7e0a41d57ce3236a11d801. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ762576544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823108a41041496a34b2a61ef46c1c3c9d65523b2873432f25efecbc273d15a7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:26Z), 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/QZZ7Q2554827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe857fc19161921b1f118de1ccbbf962176ef67301b04d1d03b086b301dcd4ce. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ7X2591979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54130febd63ba89f0ece0ec22bfc9f7426a3ca72aa3eb2e6231b0691506d29c1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F92566008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc862960f93a469ee3e6e60a914f207b5deb2d3fc3020c951993e4b90853e2ae6. 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/QZW9K2384915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9182008da9b2f7bcce33ff8389f90f562899031b3201ff58a9d80a64bce4638. 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/UYA522200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5f2f090e113634258a96a1eebb3fb55490c50e6245022fa0ef21668272dd5. 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/QZGLM2327507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c973be11742afaab5d31ee24666275aa30a7b3570656050dabdd96658f1644. 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/QZES62294980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e94b81194042210c10f1a1459db97235fe0938890f1f3c6b58fc5146287dfe1. 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/ARQIH2290495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464362eb194e06de67ab068b5341885b3bc4b3d0e820366ae0fa8d1a9d8f1e93. 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/QZW9L2272193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c045481d239b274d219742a1cdbf9e3de0fa1c4cce26577c3073a1dd0ea40. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZGLM2425823.
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