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 0x83bae2785944d101827956ff2ef08031cfc42f12371313c90c0c02b7a8ffaf1b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf7edee-6abb-484c-9263-2d0db04e5bd3.json and https://artists.proofprofile.net/proofs/artist/3cf7edee-6abb-484c-9263-2d0db04e5bd3.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 0x925a0c17bc5c7be542bf14dbb757a5df5b0c6a3b24fa2bd44da3548468dca2dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762055228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9660a95143b9e5efc8ed821405092b690eaf733dcffdfcccd4143d72ce6a9fa1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR59R1997374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd2c6759a072945e8aa8184d223cbb3725de7e6462941233c4545362fa8ebd. 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/FRX201987534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea585312e049894b6215e9f7cc99d72be72fb6ff183f86b5cc8b14ab74ceda. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX762055229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e0846f7a9187bfda184d7cfbafb2218355728280aa809c53e4dde776cdaeb1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX762055230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3dd6793876198c5e9d81454b934a3fa77932fdd4583d2395f58abad47591dc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762055231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca023ee778105d4c753c9b5f3ef3f232f3098abf187176fd74102db757ef14c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX762055232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a233094f70056f84ddd6b5503482af6fbf11faef31c2941021dfea90edc1b8f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R1936082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671a4fe0d78b28fadabc5fac83d848cce893406e4f1cea6b19aaa68d00303245. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R2016060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d71ae5e9c61874a049d71a5f4281457accf573b6c6a9c6d3f51983d9e3fe60b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762055233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500cefdb80b772dd702a34f24082786e0bb5deb12dbb58c1d5577961c71c74c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR96X1941362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259fffc132d3260864aecef9175fc8cc53cd1f1d97a2daf74941af520ba65ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762055234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab2b3d457dcf160327133e4cd6627cf5b70f190cf2e506691a5b820a5f765ee. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FR10S2241410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f77a664443fc47d49bb14faac6daaaf856669d91b1685085629e493fc4922. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR10S2241411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1498d3a930d914057f9d6acd660c84b7a49eef5bdc524326944335b3183b8c3. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR10S2241412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5451a4cf4fd38947427250d00bf7de1e57e97eb2a35927f92fe5aa3c579728. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872137558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d7a07287c290e5b963ad7c5b9eb3f04457454df6c884ccc3786fcdfb7409c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282198159.