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 0x9d809e3b2b403fc77a016ff6a886d2201eebd6575938a975ddfd7a8edfe7e0e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ebbecd3-ee76-4051-a05d-2b2f931635cb.json and https://artists.proofprofile.net/proofs/artist/0ebbecd3-ee76-4051-a05d-2b2f931635cb.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 0x109288842b47a58905d021d66b131e15c2fd5cbf1aa60aef912e3af97c0b77de. 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/AUBEC2311538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc356e9f282254cd113e4b4517af2c5413d6ece47844351e7e3878c517be423. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUBEC2317742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22c3ab445fd13f299d30572ec8b1b81e87d61762568d1c8b750dd2497070509. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUBEC2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87169d41761bbeaf4b833efe9c9b36dc40c932f12018e0ba707332e73635bbed. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/AUBEC2311537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716671b052ee9f5621a2e5b652357b04b1f32708a1027219d68d8b1d82f15a0a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:42Z), 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/DGA0H2406986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f75b996e2674fd94fd43c17cf3521b788f48f76c2733dd6ffba43dd941b9dd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DGA0H2406987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425bff7528a4cbff51f93dad22fc8cd05c2b18cf560337c5b598af0ba5d29e1c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR59R2555281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc816c8d8d19bbfe9146b07310c17d73189d6e44c639a0040d2336ff5e5469. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM72403615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b18a2a757f1efd375c6f3527128971c9445cdbab6565fbdac3192ac318cc8da. 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/DECY52400816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaad3d204867cbdfc9e1ab394667f92c06af110aeb98ccd38fe6e91783d1d479. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM72403851.