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 0xddee5769697375108c10d14044d756cd01f5cd4c1f624fbabc4b2346dd1e81c9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47588846-658e-4335-b4e8-ff949d07b68d.json and https://artists.proofprofile.net/proofs/artist/47588846-658e-4335-b4e8-ff949d07b68d.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 0x6ca13b2d99a59e944920cc44e7c44b9af375f9c31c0cb4fa4c1e4e8a7f7d68bd. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/DEYW82207909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f81f7d5b38b73a943594e1dfc0aa916f8d215f490157f6e123fa2218f8f6ee. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEYW82206396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73249de3be28d32f132ac9592d56ffb029099a2b5d0851c7cb7bd56627bb288. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEYW82313604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056305919f545a182a44ce34eb95d7fdce455d17d1ab6720fa61120c220e61b6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:06:15Z), 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/DEYW82408547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb459a66feee11b73de327c1358a6ba7237b8a9ac31e24957dc29f00d26c1f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEYW82412565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c775097c1e057a29871c0bd5b86033ddcd38f75eb558aab5d5c1bb3990b56a3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH7812424141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb650828bef8670aa21ac7b59d59f35b014864902ab0d893cc71ce73a3469e868. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812531903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb60a5931f2ed93fba876c33765b7093455dfeeba023adc78c61a9d85249f53. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CH7812534058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b0e35813f14f1a776ad9b4466dc44442ef9b495077ec25ef8f31c998585670. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:25Z), 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/DEYW82512603.