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 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 0xa0953c77810aeebaffcef6f8d539eaf9a35233afe390358dc45d15260c8ef43d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98aac802-afd6-43d2-98d7-c8a0799ca771.json and https://artists.proofprofile.net/proofs/artist/98aac802-afd6-43d2-98d7-c8a0799ca771.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 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 0x73c3e26cb043d9fb1623272d41ff8b146958d497967b506a2586044a3541383a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USL4Q1832643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd56897d3ebc55bf3ec78f7d933f5af89612cd24bb8b5c3c6beca6b5edc3482. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4Q1832644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7fb297f9fd1c8bccc05e2cb42c519f6b0345997e7ccda3537d24724d601ca4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USL4Q1832612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea69c0131984cc9af457c1102062d94dd3f5adb1ef13e854cfc7980a7dcb0b4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4Q1832613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5db673dd4bed5c075d184254951fb744fa244e081c58c0c5438507274979f4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4Q1832614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3e07cde30f63af553447870b870238c763dcf50be8ec557126f3e77e63f77a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q1832615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9357ba9009ba6c68c56b4b1916177b29e27070b1c1977c46fdffcee824f07bde. 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/USL4Q1832616.
O Come Let Us Adore Him / Thou Art Worthy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2046c64b237f22b85ca2bb25ee47d862530233ac432ac01367e56dabbee6f4f5. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USL4Q1832619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b98f80a5d3506b393b50aca73471227e06fde2ede23780ad69983a1158eb002. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USCGJ1717911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fefb5263ba22b1918dd1bdb994cb891350db675ebf6d983b1b54477bee321d9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1717912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cee841cd3604e9fd71224e98bb02f8a2cd0221e4bc1af8eff5d7217bb55ad. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGJ1717913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340747f60ea6d7bc4f304e5a6f07d784b51af5732c5eb716cfd8c51267b85e6f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USCGJ1717914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578b31b40ea49d36329c12b6a0fc8da831526dbead78fb46a0ec0de0324e3a9. 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/USCGJ1717915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bfcc0da73d6290058d90792d28bf4f16019fc9a94e3c809df6deba64d48e1f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USCGJ1717916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ba78ed7c17810d8fad7f110e5057bc8047516793f25f6a1efea151651c483. 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/USCGJ1717918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db3926c571698e99e408898367aa22c23914a6846c8df52549dd1209df31fb5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USCGJ1717919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c6e7a4cb6fcee352e44c26ac0ff58c04596e86658f0fb03a457185ab1f7bf. 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/USCGJ1717920.