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 0x382d1e107fe1f9a553106d5cbc80628ed281e7ede5c3d7a548beba5f321fd9ab. 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/af016c8f-2ed3-46db-bd6d-d52e23c75a24.json and https://artists.proofprofile.net/proofs/artist/af016c8f-2ed3-46db-bd6d-d52e23c75a24.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 0x575d8f278c60d8f1e5138986e84abefb844c2111c05672ad8b13db89c7af1125. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEAR41056937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6dea3323509cf80e6e8ee40d9e7fa7df56a67bdadbfe7373ba41689e6e6519. 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/DEAR41056939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612620e7ca890ec9242f0e720a99c83e8bda5c77d80a40a2d8eee56cd69e337c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEN581700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc562ecb0a3b22b43a550d2b1d7710450143d416808e9e5cc467ae2a40bfb069. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/BE6IP2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee1a3d806bb2f147c4f3c16a2008dfc36d3724ead02f803ecbb40131640786. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BE6IP2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46222b34cf0315d30c5c1ef07646cfb8a925a483de03f7129748ccf3f0b9cd3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BE6IP2000069.
Paradise Carnival (Herbert's Friday Dub)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ca04ca48a3079414f57fdb9f41f3d85377d3b9869d3a733ce3e13745e3ba3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BE6IP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe11be391e9e0a641bc670c08151adfff2d68d09565f32f7a80deffa804543. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BE6IP2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed935ec39ec997a5cef8f0d3e03175445bf4de6c6bc5dc7eeaafb121484a56. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BE6IP2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc82cf93b501c04414e833bda16cb29dd5f548e888cfa28a4146d118f120379. 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/GBKQU1292493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612620e7ca890ec9242f0e720a99c83e8bda5c77d80a40a2d8eee56cd69e337c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEN581700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ec5c8166d9fb1fdceed2688954532759c4a36903e6a12cfee8b12111930fc. 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/DEW871506561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ae484dc857bc0313f9a502b6c316ef6e9b268d8328eeb30261ef4bb8a43851. 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/GBJX32005050.