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 0xbb679694ef8603aef39f510427c8c5f6f9d896945d065c232adc3082a3f347c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a595df99-a883-4336-afc9-ecfa8409b83d.json and https://artists.proofprofile.net/proofs/artist/a595df99-a883-4336-afc9-ecfa8409b83d.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 0x2c9dd6ee9d710a19082b9cec1c46226ff7e327fdfe43d959e93a156d3b70847b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731678380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54632900298a4262d3b5fcde8801880da769d61cde8c0498244ed9c41ed84b10. 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/TWDL72109969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c054cb2bd27379795bc75f3f6e2a56cd9973d95f3ed981675b0cc3b361fac4c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731754867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b157f24771e77fcc8080974b4084270beaf3896d1fdb2ed36f93446c3c1bde4. 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/HKG732135028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa781b68012162a336a05da340c7275bf1daba8cb60f4dcd9fa8b8ec38a66c9e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732153826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79b7e9089571d94567880e3c08d624bae5f57129e1a320815e1b60fb3bf3e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731625025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc03b3b51ed382a1cea0c55e645be3e47643f32b983a7c127f48ea02a9021fd4. 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/HKG731625026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bfd1f594222be02d1cc5548aaf99a575a74619d3b9613026e4e9765ce963e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732315163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8c2b05060764b96143c1970ea2d50edef23855b61d1c457db69ad009b95120. 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/HKG732356646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07797b2895a45cb6145b2ac3e26a134d0169e5fc83b99c5eef169d99335456c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732264959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6de839344ff40581391bcead8f41e388ac971c11b2d78ec531a099ead397aaf. 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/HKG732229211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9dfc7eb979600ba916d557e6c95549a778dd410037719a66cc9b43b53596fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732106203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd9420b15059399e6c037471a0bbca61132d95a2540074cf2039ac7612f4be9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732149175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2c7ec68ff2d7dec1d88a9f701957452655eb4f93a338138746d1f5f59c2bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732155889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff5a8b1c86920dfacf1db4e3f343b4de541bfbd7b014b02cae9be097eb352e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42103250.