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 0x757332bc2f5fdd1d098aa5fffc328307b5d020a87f0785c6dd790ec93aa4b755. 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/6ccbc1a4-782e-4308-9c6c-f21bea153837.json and https://artists.proofprofile.net/proofs/artist/6ccbc1a4-782e-4308-9c6c-f21bea153837.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 0x8d4bfe88198ddb452b8f760f3313a1d00fa9f99e5216ffba3284ef5ead172739. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:49Z), 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/GBLFP2513432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aa88df3ea558d6ce9ffa69363c3ba04569bc7898642e715cca208751f2d023. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:44Z), 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/GBLFP2513433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a0bef341e645a80506bbb8fc96dad2463d39688768a948e7dddb8d9cd19da7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:55Z), 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/GBLFP2513434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410e161f029eac9d2918fdb93d595d2c66c2b7ebcb7325bdef5e70162d1261a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:32Z), 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/GBLFP2513435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c2e6882a5e1499fbc0c91aebc36fc598fdcfde2ba08932338d3d17d7005a9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:06Z), 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/GBLFP2513436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a2d2d2c46a7af933155affbe51f29d9cbaaa7b076d8578fe7f827ea10f8a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBLFP2513437.