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 0x609c15166273881813aee9ac762d13eca917c5c5ca6194bf7f9bc64a1d1af77f. 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/547f0bf3-1d8e-425b-abb0-d711a7a1a717.json and https://artists.proofprofile.net/proofs/artist/547f0bf3-1d8e-425b-abb0-d711a7a1a717.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 0xe4882cdee3bd841512fea260c2328bd3262e58ae73c56c04a38845e7a0f2a76b. 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/SE6HN2472948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf9693c8123b2610dde9a7cbadd0e0a1c52e5cfed77f7261b32fc5c7257876. 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/SE5752473925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0ded73f33716e8eaae6a87aa7f472401f5962f5fb4c8fffe9f43d4458789d. 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/SE5752487558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778b1d37fd9513a70a2585b58a46a492364d276767fffc91b66203c3562ddd00. 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/SE5752442965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e248967e87f0c6f0c4a606684914199d7e8d6b4a5d0216d0963526b69978bd. 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/SE5752456756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd631983901e99283ba1730c3aee63634732dff77f92b46c3c51406dea36508cc. 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/SE5BU2489955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd947a060ee10f067945a7e945a8346fa0f2c78ea27f04cf52b13d60bb03857ae. 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/SE6A92375980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb6f3e1756ad4b585ed4ca45689a46a3c351e3eacb22891f7540d46bab6054. 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/SE6QE2402730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e5e6855845ac1cf20f869b4cf12fed4c063e26cdc24c6568c5d87fb0fdfc6. 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/SE6TI2340244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b30aff4c83d4e9be83bdfce8ce530f01d5a68fe3b3a2b503a9e06f72b82ac2. 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/SE6XY2337283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be753d06b504cc3c4201a5049413ad1983b09ff5dc7770cee2cb25ba5d32095. 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/SE6TI2319854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba024678b9ab1d58f01a65b44ccff64aebd823e6fc9168937478ea6bb604e98b. 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/SE6QE2349383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc862a4cacbcdc107e89815d8f29cc6387a3e74b59dd32a369245e77264cb7f51. 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/SE6HN2393805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe1884d858438a80c7fb29d2154b15de70aaeacc6ed571cdeeed0ef372d3f20. 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/SE5752307745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c8af63220cf1c67d4641124e293c224601eda75fad9b02e3f7a6120e4c651. 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/SE6SA2416423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be4cb7e9969a003f6e0240f0ee4045b8417b8a2e51a010b53fd80732c62503. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6QE2462477.