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 0xeb919d8ef11469db9f4421a325f55f2008714e247094c77894eb16b72768c771. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65bdd087-90f9-41a6-9879-2db201307688.json and https://artists.proofprofile.net/proofs/artist/65bdd087-90f9-41a6-9879-2db201307688.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 0x514e72fb19047e9be8c957ecac65b9a41eae62e5d2e116c854a3e63f9202d09a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DECM11014101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed80600b5415ca236c7de165fc125ecd245ef5cdcf4b9e591ccc69754109d20c. 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/DECM11014102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f988c263d03f528e69c76a0443bbe0eb5783cc101e8e4be19472b1e3478044. 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/DECM11014103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c8f33d4b6f53515773d4ed0d509f7df0716e246092725d966d4ca866ceecd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DECM11014104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cfdd091fcd78a9eb9f1f3b5ec9d63dc69a5db9e55ba53520d9af002405403b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DECM11014105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d914915092549c1acc21f4fb656f994d90cb62f14b006d2da24ead48112e3ee. 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/DECM11014106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a2f009878c960ca96e4bdecff020b15d8af6cfaa8a23ce98e0dc439b7a51b0. 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/DECM11014107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea13320843b439741abbf279aba960ef22b32bfe7d9acfa63289117cfe23c2b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DECM11014108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1a18d02135aad73acaf1cc80fd9d0d39cc51f29a73f30addd436f4d7b5aec. 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/DECM11014109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a517fbf6b9c78ca191e8d8d298e2cf6c79018daf2906287df9d98e60662c5. 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/DECM11014110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69e24f2e89f11e9bebf3d322fdfbb72b331d7a011636f14846fadb5aab05e03. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DECM11014111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dda9f10d70b2b1550214fc4172fbf4db4be926fc9da8f5eae9d3bd174f6d393. 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/DECM11014112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8a86dc906c4e865cf91280497a09da2fb6b0c58b1eda990ed8fc2e20e01a5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DECM11014113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc880b35b949a66092aca14893934c8e3f5caeae3268900484748ce1a2894a66. 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/DECM11014114.