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 0xdfe3be280e26c01ff3232702124dca3f4526842bf75fda24508b78b6d5cd9eb5. 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/f513a7b1-cb51-4149-8a1d-d1199fa4bfca.json and https://artists.proofprofile.net/proofs/artist/f513a7b1-cb51-4149-8a1d-d1199fa4bfca.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 0x6f0a3e31261c5d9a81fefc57cf4a5858080788bb1d34f7c8d9db742de90ca6a4. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:30:23Z), 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/TCJPL2082812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741143dedabbe2b9d3380a8fd71ab2ab24ecba8cc0536ba25a16dd44dd7c8fe6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPB602171446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62db961e143bbc6e23e5afc9e602da2d787781c6947fa8ce15ef0514b30abc0. 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/JPB602180646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5eed1de7ec3fd62a6f028ede21ec5cb5b96f7f21bddf950aa69c78d699326e. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/JPPO02300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7935f3fdb0df290d35e0432984617906100421acdfe15cf7318f09503bc6e44f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPO02304421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8e42a7820ab0e9368578e1e2f9c99fbd6a3540c7fe3f1c98092113231a0c1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:35:43Z), 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/JPPO02404554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7935f3fdb0df290d35e0432984617906100421acdfe15cf7318f09503bc6e44f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPPO02304421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150b4f0053f8a6a58af1cf643c1c39ef674a206f33b9b34eed0b55d90cefef4. 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/JPPO02404551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5b366dc94a1a6ada94eb8e65b56b9726fbd548bb3760cd095bdb589364ffc. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/JPPO02203685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc714d8135040c0c5327bd214125b961560a282afd2291f06a0afb64c2f07b42. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPPO02404552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8e42a7820ab0e9368578e1e2f9c99fbd6a3540c7fe3f1c98092113231a0c1. 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/JPPO02404554.