thumb|350px|Part of the Zliten mosaic from Libya (Leptis Magna), about 2nd century AD. It shows (left to right) a thraex fighting a murmillo, a hoplomachus standing with another murmillo (who is signa
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 0xb9995eac2002497a76871520ae06c696feeb874d2ac83b23f3246b9479226597. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/439ae02a-82e0-4f64-ba33-bfa05817910b.json and https://artists.proofprofile.net/proofs/artist/439ae02a-82e0-4f64-ba33-bfa05817910b.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 0xf615d89004b50684bfdeb69d137e41ea465cefe26fae64ecb87069206d25edbd. 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/GX3Q92494909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36f547b56c9c3febacdbe051a8c5f639ae9e7deecbe5804ba74bf06345a9e5. 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/GX3Q92494910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0faf868f494ee3ab13a663f7676a684df9af2dd2bc09db8ea3dddbb3612bf. 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/GX3Q92494911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0181ee808362f3203c942655b2cb6362629b81a646af9ae5fb14ba3242f1c7d3. 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/GX3Q92494912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72474098f86dc988a86e1c96f63cd7af292421ab2683731be032685cb9095ce. 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/GX3Q92494913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b23f07d3d79423fae330a659eda0e1ff199d797e7dd49113b381f3133072073. 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/GX3Q92494914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190219a5d5ef19fe3378b0097afa4150a7f0e1f9356276b64329c696e26e3efd. 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/GX3Q92494915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3452ffb238aef753b0030da42a99fa48e7bc65aa2db333dbff2056bef91a55. 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/GX3Q92494916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63fab33516da4a8234ac1aa83acfd29773eaae1cde1a7dc14ccc95f72ce9405. 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/GX3Q92494917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9618e247ab0f644b13c4e32c005ef76c63086127c5ba8c4624cc82fba5fcaa1. 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/GX3Q92494918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc694fde008c8be6f0a106a9afec3fe012fb4fec223a020f6740ab520840c21f. 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/GX3Q92494919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db6b87b70f1fc37c9b5879f49ffc4c31c95625f2d593daf99d33a2b014928eb. 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/GX3Q92494920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fae18202f83ecd8df415e76ae0af52786b9fbc28cdb51dac9c41f55b6a5342. 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/GX3Q92494921.