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 0xc0e08d7c3af8ac3da4d3c5d506d2b8b894d13341827236d7c0cdb2d9cebca1d6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf15c4fb-4f9d-4582-bf53-3f4009e6ec73.json and https://artists.proofprofile.net/proofs/artist/cf15c4fb-4f9d-4582-bf53-3f4009e6ec73.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 0x7900ff18fef9d33add3c6d6d86663b23e7ff489d253f4ceaff450d23010e5206. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:02Z), 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/FXR752410720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b0db9f3a1b232ca260b7620981cb7e409f610874bca54c833eaef6e4a3509. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:47Z), 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/FXR752410661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137a518c0d2990709f3edf631cf88a7741c069afa4fca0982313130b7d444462. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:26Z), 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/FXR752410726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d799e9bd30c9b6d57048812f5e8259343f6130878805b58f7d7e7fc5bf5458. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FXR752410723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf96a4f1ca700ca41eae7496ca3a2932178ab482125f69891f69fa0eca674258. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:26Z), 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/FXR752410719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2ba7f22323f01438233c8653d19ea063ab214f5d844544ae539cdff6704005. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:05Z), 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/FXR752410722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a53377a3613c39cf5cad3fb5a1c866b5e5e0eae1603940242c1faba7cb598b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:53Z), 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/FXR752410725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3e2ed5dea57ff104a2938422dad62de363e9d5e87a0df01abadcabb7c4495c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:50Z), 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/FXR752410664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c94b0c98fd5d9f220f8a6014a70e7413e75f3410683290bc1041d58aa6ba0. 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/FXR752410670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782ec677cb62d34b09125fde82bbe946e4aaafe25608667f6f8863853c3ecc0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:34Z), 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/FXR752410721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca77e5aa78633b4c8e18ceeb8f3e257fb3afd885335730fb17f9606206969370. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:34Z), 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/FXR752410718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180bb92ccc6eec033ac5e80ae2bcb5268e61efce6b00a15747502a5cab361662. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:57:56Z), 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/FXR752410724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553b78fceec160d85e99b7b3637aeb3dddce2dcc11c4920380bb864c0e728ff3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:42Z), 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/FXR752410717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf32d0c93ee0ba20f74bce5252072616dce4da1041bbdd44ba6d9e8f59e659d9. 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/FXR752410716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd18056492161a1a6ae0ea743c7eef3d96e587cd416f1af483be0462b789e59. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:38Z), 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/FXR752410715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadd53ec4e4b76dba8792e431efca1bcb16ff106c40933512c3614929dd365d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:13:25Z), 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/FXR752504084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d6ac5dcec25626193faa07697d635c0859859e8e17e0377a3e38cd56f5602. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/FXR752504107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c4f2593d3560b30a91bc61dba3538e3af814f25a22cbb5be128851d46e830. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/FXR752504108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc63a3477ba80e84994e129e775bd6e3672f4a35ce50b5c39440069737dfb5b6. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:28:27Z), 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/FXR752504110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92dc27321365df181ee366b08cdab1f15e8fbcc05c6d63756f54866a41e41f4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FXR752504111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e18a52e963bccda9aa5442b22a1676066d063de983b7a19fbc098318bb792b8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:59:47Z), 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/FXR752504113.