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 0x1f1d1ec2bd42f25a70b84cca5e4d18119393e15a2f56805c680e4a2611628362. 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/4eb99095-2a31-4107-8224-c5bf2a604ba7.json and https://artists.proofprofile.net/proofs/artist/4eb99095-2a31-4107-8224-c5bf2a604ba7.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 0xe1306e35eab7448b7070f1687769a3de7736b222aea82a246753c7d3b6f8f97e. 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/AUBM02000487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce42338c53836bf8e0aa3441011deb2c038a4b864d8fc16fcd2c4d2ee340fe0e. 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/AUNV01900454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c4d704500c72bfd17c9694592f63642931033cfaf95f09019eb0002d255f8. 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/GBKQU2508916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57c13912d5391105f822be2ac83baae53396d5ebe794c2c5082a568be113b31. 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/AUVAE2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4236e630979ea244dd847b7605386cfca83040e49a365440125925057e88bd9d. 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/AUVAE2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc587599cbb1f782edea8fa702bb7c226dc57ab3239e69d4e5255a07f5c88295f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUVAE2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dabe580c23db374aa9ae3c777ea80e78806ba04b74187228cd91d81cfcbc06. 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/AUVAE2000377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c71a2d1f4cad33a6b1688fc55179e5aa0be64929b75bd1db6ff7919cf4d74. 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/AUVAE2000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708894756aaa404b139ccfe633f8e00c2389d138cf6ea7bb6fe2cf9f89fbc3f. 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/AUVAE2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4d3cfec7cc9446feb8d2d6eb17e11c3970529eb17f72cc0dddd35bda3f094a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2068310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37233d5aaff74993427d1f8e7817ad62fffc595e305ab36df739154a20e561ac. 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/USYBL2000727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9185ee4e33103d3cea048432ac1ebbe5077666eb24e80b74016634aa6e163a4. 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/AUVAE2000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48347f420ad6bb330a1c2822fde82e2df666183987d38029c688ea4de008cb7d. 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/CA5KR1939705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5027581c64b89dffd35730ddc8cfa6ac1006cb0b51ccda19ad2dcdd887f631d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUVAE1900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7f0cd626efb89fef01f18a1b4449c24dd517907bd0dcf1979d9a57d81fe195. 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/AUDCB1701119.