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 0xa9009c59d5937e797de3685cf6d057593e96d79325bc5eb172a7011400299d4e. 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/f3332e8b-4f46-4c31-852a-5e6ddf20a564.json and https://artists.proofprofile.net/proofs/artist/f3332e8b-4f46-4c31-852a-5e6ddf20a564.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 0x9407c9fe2f4daee6c7ae923b364e3d3f5394f56c821a97e5a8ad2558d4b0e5eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983a04afbb74ad90ee4c0f6b3ee7e169b4b483b9dba47afcb788a9176887a299. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0b85dec1c01f3237524642d1c9bf9f4e4e6c7c58b39eeb9cc7fb532b25332. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b394bea3236b3104d018d167256cf2f342957d08d81a9892374817b714d187f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128437d2f6512f91b18b8727afb24a65a0935e825f69cea4276025d402b18bd3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50f9238c7bf65f640d2de50f4417a7051c62271b1659dd082d8b77287278ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81ac9d7a21a508728492ece459a9ed61d482d45d127b097fd275b7624045775. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a5be23c48e96fb2f0c06e379c0d47be648c65e05ea1bdb3048ea4acbaf9c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2301118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae79a652aef4bc697a4bd7883576f13e37d4245a2439d0ab70fa8b6408f7a81. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b2220da16c848c871388f6a6029f2e6fc90032f005fe7bf3379d79accf92ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96081504f3856ce4ef0130db7a0bfab76814fbccc96fa7c7508a19931797e52. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36abe2c714cd60522c2f75e0af1bc5a9b684159244475a99afbba4dd61f65c33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34df2daa73dd2369879ea0f32327ac7e7e4f2522acd6fc26fb07413aecf7b795. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a834d078e62322b2429529b880a1fe1e88a574efb068d71d4adde6b5e6af524. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LD2311735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3621fd0afcc811c8679440fd877e200f2112e82faaad9f6275b8c9c5c968eb8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2200726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3100d47d1275082fe452a71963bc168c9867603d936febbdb574acefaeb01bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336a848b91ae38885c44ea61c83cccb59988722576d0e82a306705f4872d288. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea63cd00919149955946e3687a95ec366b2487c8de6df6546a853b4476084e22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484228c21d5f5f8329092063c4bb639af538e32591011d5695293aa90e4e744. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2100804.