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 0xb3794b6cbd35a4e4b625696a41a22f8b9d36ae87e90ab48db4a3c7fa20068ea6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/284c95b1-790b-4c1e-8ed5-9e79d3829509.json and https://artists.proofprofile.net/proofs/artist/284c95b1-790b-4c1e-8ed5-9e79d3829509.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 0x3de3827babfa7fd3e2ccf2dcce1e048b32e3f7cb504d8876e8fa74d71e0fd0bd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN42261069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf820a0cd330050eab576e3b95223e6ca116e45fe4108e325e2684e1c122ed25. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGM2280749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8605669a453e4bf6bc78030f517f4cd695bcb59c24ed95a5f7c4901ba8d6e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGZ2344121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c172531c7c967a6a41ae7b84b6099d0198ef81e8972470fa8a26d8d341c7ecb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAHH2396954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df5bd7839055e3cfdbc2cddbf172c2f018ecf4b4eed94d57822bff44f1df0b. 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/TCAHR2335431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a1ec0611ec9574630c9a6c45905bc5960ab57932efb6415c157e0f1629759. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAIL2468219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb0f00b024724c187f5f8409f7ba575ffc3e243fd59fb3797387af05316c93. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAIK2468264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7f7622c9143b0a8bcf9fb22425cacbb56c946cec36b007576b63cad7e0b624. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:10Z), 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/TCAIY2482595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc0c78a64aabb3f0f280e1ed74ff13c0753287cbe85e339b707510746359cb. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/TCAJR2548308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61732c9f8da4754d208d28702a71af29475662e0efe1da381d090d251c3c92d4. 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/TCAJR2550870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea572e0e7a579ba7128716dc52d2259730c19d9b19af8d147ac7ddd81ef0a39. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT65X2522733.