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 0x8a63c36dbb7d51ac1446391bfb994cc4146fedfe64336d98743500f536c39956. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b789dda0-5da1-4bfd-9315-9631a617734f.json and https://artists.proofprofile.net/proofs/artist/b789dda0-5da1-4bfd-9315-9631a617734f.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 0xae8e8c7ed80ee303670b0acc385e49212b01f94f04037e3016a9589e6b62481f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:49Z), 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/TCAGY2394727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ebc46c93ed2a5fe9896d472056c787d5355573f711de623deb1823f30f0610. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:00Z), 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/TCAGY2394734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96324d748d4f26f8c410ab9e9756a53a41571f3458b55fef6dccc6b870599ffb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAGY2394737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee41080d4c2b2d3902a9c462d30a9beb2cf6215309af93766ceac02ce062226f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGY2394749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39960cd437c47c046388542fb88f3eef702de01c7947dbc4ad7038e3c3d679f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGY2394761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6723694ebdcd012948835027d7f16571a2b9de67079dad63cb05a3d08bdecb50. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAGY2394767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81c4d78c42c5bec697077a0d453926cd70cfb1021b44f3b6f4ed99cbef8083. 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/TCAGY2394778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e2c57152f2e6a852244a252606ac74814326894a884a60771bacde15ef838d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGY2394784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001571cb1d071a6094a5fc061740546c83583b6423fb0531153076a54219b69. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGY2394791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eb7c251c72988828f2547df491d282e8ec498738944626691b88b3ce210caa. 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/TCAGY2394800.