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 0x84fdcbaac3424f2c88a627051ac203647ab6719f2f7478d6f85835480ff5cda9. 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/a1e05a83-0ed3-4ee3-a499-f4091e934d7e.json and https://artists.proofprofile.net/proofs/artist/a1e05a83-0ed3-4ee3-a499-f4091e934d7e.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 0xe73f8cdd71a93cef18cb7d640866c06610ae7d1bb1bd4441ff45a221a8625a39. 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/TCAHM2354413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a49d775a2c8b2d8d7302d45c2603d5a561fdc5c1de244988cacf1af852e6e29. 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/TCAHP2356769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a49d775a2c8b2d8d7302d45c2603d5a561fdc5c1de244988cacf1af852e6e29. 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/TCAHP2356769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67112ac81254cba80a915f86532633bc9c6bf62f0efbaa71352b2a1b92adc9b0. 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/USA2P2417305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd0ca98223b6ce6a7fab93c06b5978d34138b5205423285fb9bf7a8f721d686. 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/TCAIK2423399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8690fdf787bda4d9c07419da741d8a18f3eab2f09e72af6d8d74f01a459638f. 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/TCAHY2495998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b400db9cf795112d51fe866b63ab949c1ab0f3b856b407b0d7912f634899f7. 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/TCAHY2459587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09cdae0a42c1bd48e8ca2428be20eb4ee42a38dd77917a893035ac1f506e69a. 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/TCAHU2499969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e0e32a459eeab7e2ccfe0b329b8acf029be1ea590177a2f16edc38c3a2c9e9. 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/TCAHR2397156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd5e5687598edb2180caf65349592e5795b4f09657d9b350252962012431787. 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/TCAHL2354359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae471c2b1ac7301f6f5fcb62803d559a95750b573b81441fa5585b94ae387e0. 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/TCAHE2365753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319b3eae96ad8f2d3d99b7885cf4be5573c748f14ccfce9edabcd14e2e637ea. 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/TCAGW2349186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4cf770fa2a21cbdd306312a76df60e659353096db3cbf04cf75f1fe014da0. 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/TCAIP2471844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41506e9836b8489d4278574f3afc474ee48e75f80fdee4c34991c12e6368760. 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/QZDQH2388257.