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 0x7faa293ebb0c6239eab3bb2d743992bf0ecfd56926c7745b17dfb974e13e28ef. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35893e41-af02-4b43-adef-4687206d59fb.json and https://artists.proofprofile.net/proofs/artist/35893e41-af02-4b43-adef-4687206d59fb.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 0x31fcfc9b372f299fe6a36fcea182a992a40bfaf90af93df245a8536597091905. 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/TCACA1484428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2634f7d98f35f4ad0eb67acd05f7365b2d1aec3af6d24fd94acc883d6ca66659. 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/TCACA1484429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75602bc6505baf58d0329d0569aaf068e0ed5a424633feda3b9d5fb028e0657. 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/TCACA1484431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e33b14675b2c2c943cbcf6d6cab3a3a235df00972b1d8d0c2ccb91416b3cb3. 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/TCACA1484433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a516bf375b188a3515fc88c41c985aa12f0da6b951634d6f3e4097337218af. 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/TCACA1484434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b3f972e4b00153749cb0269293289f8cd60bc34d83068df0c2b1ac7a890150. 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/TCACA1484435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe203ddae191418b73cfb8e4191f4ab4d5ee0cad8ad208e558cf16841d536edf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACA1484436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8327329fde5e1f2062453687a4b2ff507862e2bf59e1ee48dee4f8db1bc14ae. 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/TCACA1484437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ae8b5584580b8305568be74dc82951ec88bd77f852effe703ea1b085480d0. 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/TCACA1484438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017ce5b97fe03616c38d46aaffcfc199cedcb1bb76a2fec003f196835d018b6. 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/TCACA1484439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5566681a4f062f00930d46be6d89007a0cd8c0e84870455b99f092ad615c289f. 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/TCACA1484440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd423f7b968fa517a1668b5c44f04f9b540366a356e0a44c2d1f06d5409b64eb9. 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/TCACA1484441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf337b6a3d6ff0a59e2ce380ca5f9d796ea19215a99a2d39a1473505d9cfd9. 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/TCACA1484442.