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 0xa533a9ac75e7b1a06eba5f5ea7c9005e630c4ba946f94e2935624a95c27b5cdd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d0da25-558f-4243-b92c-7ef72cee07d9.json and https://artists.proofprofile.net/proofs/artist/97d0da25-558f-4243-b92c-7ef72cee07d9.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 0xbd9993bb32bffa07966021a256cbe8163882f4516ca65dc95674d263110bac91. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZES72580893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffbef0a9ac4ac8bdbc7c6da5d8f0315e726ad41133c094296ef4ba6d509a847. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES72580894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21803a8728b6428e0d9ff8a605a72f0db7e5a544d1160e82facff87f38b97c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES72580895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc73fe408ea5ca0a4d163cc6757b558143244b32bf8154b625a2c0a982b6c00. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZES72580896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cc220eceea39ca3e0859c19fc5b93728d4b08c3885f510dc4f54eb4770e88b. 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/QZES72580897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8108ec094ba654061c97baea96e246c62892486b3d51c116ddd19a26ea0af740. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES72580898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4c258929eb8ee387432ba58d2c0035d0941be4b5f2d55e4ef61ac1a0d6a7b4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZES72580899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65df971f9112e9fafa7267b703e25198b9ebba531be44a026fbf9eadd10309. 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/QZES72580900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e5c550a7504ad75ffa2d6fa5e2fa61ec2514e33faf4478d9c58962b3cd9581. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES72580901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfa31dc23fe43762608bdf64b345b49131752efc6146dbf178808081af4687d. 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/QZES72580902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265347f789ed40e4d7b9345925f08a05426705a33437cf28488174bafbea565. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72580903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96d38a51542990b3f7155bfe76632ab1dc19be899e06fcfce0082f0a59e951. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES72580904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb14ab3feb3cf913b1371a86b9129768dc642c1abd258fa72e1470ffac1f59. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZES72580905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c841b86e91ef4e628000813a596bf3d745f51f2d7780bedbabbd71b664c9ff1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72580906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f4dc3e1ce8241deca2093d4fbd7e7e8e5c0a9e25048761552f174d660c596. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72580907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b97c1d19a52265f522f6b6349839feee5298dff30dbb701ae2e977d9198e7. 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/QZES72580908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aae532c41a4f11af78e4090741ac11be4566ec68110dbca399b37e28329b91. 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/QZES72580910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc066fb0babac2e16b9790bcd57ec5c96149ea9bf8d047192f8495a927a89dc2. 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/QZES72580911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7602d48d77b9808d9854c9f91cb51595edb313ecafc65a5f6722acfa8e78cd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES72580912.