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 0x8e07ffffc10f9ac971edbfe09da2221c1c16dc3bcfd1cd1324d4112effe6bd00. 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/b46e9075-56f1-4215-9b61-56fd889c97a8.json and https://artists.proofprofile.net/proofs/artist/b46e9075-56f1-4215-9b61-56fd889c97a8.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 0x8b1f433ff0e2444eec5b485c97fb8073b60b7524d88f4bdfb7a80f3acdbf0de9. 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/QMDA61820929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98682ea991b0e566e0d69faead6f83fdee262416d4cae8f138934b8e92eb5b86. 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/QZ9NZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3167d6fd32a00cab7eb064d5b06551aba9e31f95ef018428ebbfe2f3fe3befe3. 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/QZ9NZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70402d182c2daa58413ca2342ae319296410e4807191648a68b706b685232820. 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/QZ9NZ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1426c00bf48b358163ee8450e794ce547df740d7f809c376876c40741607c768. 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/QZ9NZ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743bad7611a3ca72a2ae1f2963e076ab1267f649e4984def6d4bbdf4f64e902a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ9NZ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1a5286038c7220b75aa0f516b59b29595ada70edd5c6ab9ba7f6851160350. 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/QZ9NZ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278e269c061f52e6de4ae65568ea88e13b686d3f0418975faee03ea617b5dfe. 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/QZ9NZ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31649551962e1a1bea846a5e98f898c1e0a46328d94a52768dd3fac955f8feab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ9NZ1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea54091943df3b6b77bf725d54966fb5fccfd6d38b34d12a6f63bdb1bcddefab. 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/QZ9NZ1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35aba01c005aa844590b5695085fe3652d6e345f00dbf1afc4cad43c02f5cc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ9NZ1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2239b1cc54412ef72b0932d9bd685728de102faf63650ce624133de3b0a9619c. 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/QZ9NZ1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f588c9af40db8b13fe1d5c0c32bb7b972a165853ddc22bd7ccb8783ba16b459. 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/QZ9NZ1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58853cb859cca2e4928505643ba3c3b23f5eb4e4188e803805fc3fd284c1ee73. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ9NZ1800013.