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 0x1d1adc42d14cbfad0151a330af4031c200dfd83851670aef1376d010c7c0e187. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa89d80b-fe0f-41f6-b6d0-b014fac7541f.json and https://artists.proofprofile.net/proofs/artist/aa89d80b-fe0f-41f6-b6d0-b014fac7541f.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 0x4d2bbcb8823353589499c719224b6973a4bcca71ec30ce2049e26c1a5568bdca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDE2485858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07abf3c582d3d3a834fe1d119d28a09e60a3beeccf5118961a6c51aed4b10130. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTV32462074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b58106ca9e90e66237a198bf3f9a450519c9464241a54bf4eda2ccf28db0ee7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN32375348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2bbcb8823353589499c719224b6973a4bcca71ec30ce2049e26c1a5568bdca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDE2485858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19b16add066510ad13f54f0bea6de4e2efc2c93aec8e5c4cecb4bc6d8dfe3f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWV32455118.
Ahmed, With FRIENDS! Vol.1: Friday at Kylté's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c77147af4ad7fb7a1d64e78ad1e1a61407013134c470865c41619d94786dcb. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZZEB2417211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd69e453ddef35dfd9300f54a830e94a592d82f08246319036951ec99bbdcf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZEB2417215.
Ahmed, With FRIENDS! Vol.2: Bedroom Bullies! (Scholarship Edition)
Carlos Danger presents: Irish Hash Mafia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c80da8f4340538ff0a7dd9c574524e91d4421326c91662a2ad4e3dfd30c5c69. 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/QZMEN2414619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca90e5db79fb8700ed9aacf0bb11e87b42df7736c441488b632c2eb529b89e82. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2414613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f25b75d6b678d1bffcc3e042697bc3e14d5523bac5fd24ff02c029a6dea3943. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZMEN2414618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b9aeaf2551045cd904f15b2d4525793153a7a4664e9c1065198c3cdfed9a0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMEN2414616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c41999b92279bd700fd5a6198b25d2a5dd89f2eaf9a1b71fbd4947b24f0911. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTB92312731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf843ab04804f5f1f84800a52922c9aa5dfb56d7ace941a360edb3db143fea7d6. 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/QZPLS2123000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998cd30436642b93aadba2aa386d471139bb580443c2361e530aacbc0153a12. 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/TCAGJ2292431.