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 0x049db64c2a5643cd42cbc0e2767af9a648fb609c4bb94cb0820bb1af78bc2a04. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c647bd1d-bbef-40ea-8dfa-3d9ee08eb771.json and https://artists.proofprofile.net/proofs/artist/c647bd1d-bbef-40ea-8dfa-3d9ee08eb771.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 0xa62ba1905993ea00713b52c1a7c9e325398cf964cb42a4500317eccf847d9c40. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:16Z), 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/TR3430900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e291ed2279b8f4d10367908841ddf24d4b5c686804fd218a80697e4e6cba1c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0332112648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06860053b983c649a82636ceddb50afb7d06d7a582315247a3d137407d850cf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TR0332112658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a0574b7f6b34f9d30d3794de49e76baca2e30109ada2e035d7aeebdc3eb09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0332112657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0600a0b6b1ed87e6b32d662d5e826a9293daa12f4a1ec7a5844a698793521b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0332112649.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055d5983ff0ab27e2ef09ec556b9300494b00439f24a4a6626191ddfd2b58eb. 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/TR0331501686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf724d4d5d56a6cd5992891bfb0ccf164d992de28361b41d2a3df726c2916d9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:31:13Z), 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/TR0331911740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c150a0b333aec08fdee157172c4c87b9b6f4cb616c8a26c8f436d94d27a4d. 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/QM7281904531.