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 0x5eb0b92970165c04d62bc5def490349eeb2682b503599808764c0d34e20f1ea5. 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/80b7f02d-6757-45de-9c74-62768d2c74a9.json and https://artists.proofprofile.net/proofs/artist/80b7f02d-6757-45de-9c74-62768d2c74a9.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 0x0accdc3e27a4f7b74a0b2c7298d2b318e9a9cd92df52d9aaa5ed0f20d94e665f. 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/GBLPF0600583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55d713996cebee84f115fdaf5b2c9d96a46a519e48362e3bc340e28aa8d1a1. 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/GBLPF0600584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf62e014ecb860b47f2378324f86eee44fcea37d718938153bc6a7a09b8a5e. 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/GBLPF0600585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e4640d8950d3c81fc92f0858b82b8d68912f2091265955c24dba462ed32ba9. 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/GBLPF0600586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75ea1644e23eb2b4aeff3c992ff95cbbdb81d6ecf7e276f3237f2ba66908dc6. 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/GBLPF0600587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521b08e134e859ac6922d22c93b4ab6b3424ddd4c0cc55215a4507280b79d808. 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/GBLPF0600588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0b238f77c057f225787972eaa56554033d01b07a0b37f94debc37c0f31322. 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/GBLPF0600589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d359f81f73df56527e7c92d5aa82008b2b2c1baadd13449f33dd2eb55e68a7. 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/GBLPF0600590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f779dedaf4b708f7e9209ba16b5fe541ff4d6375b5f3f1ff624dfb99dee2bf8. 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/GBLPF0600591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c71a7a333342c113d1bd1d5c5f99e62989b706b7483b4cd7315755a7f88d4. 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/GBLPF0600592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f7ce1ef34bc8cf9527fca57c50c029d0dc137c48dd6bb715f68e2d60eddd29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLPF0600593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0130f16aae873238919cd2f7af380a61ce2d3483a5b42c8be6f5587c2a0426dd. 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/GBLPF0600594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e0abb9bb31a418a26a87f12853c6781ef6f1250b061604c5d74ec0309baee4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLPF0600595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab2292959ae254f64fbeceaf3cb55d9db1c1f7b43e404efda610e4c06afcdd. 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/GBLPF0600596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28c5b095c1da134297b4db2a7eaea122caf8dacf15cc064616934b87a76a315. 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/GBLPF0600597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ebcb1b1a664dd53f2d8a172e1bf870a2b91946062af5ac70de9123ae8defb4. 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/GBLPF0600598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006bacd2996452defd6f6887949ff8df7e9ef75585995e498df743cccb349491. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBLPF0600599.