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 0x73b8405a26b4e96cb3c6511b96c130f0d737a520c144f81827048be2e7de156a. 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/f8a22122-d14b-42bf-a843-f645d96a1c07.json and https://artists.proofprofile.net/proofs/artist/f8a22122-d14b-42bf-a843-f645d96a1c07.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 0xb55483bdb5233ab3a8b6befa771345fcdee0c9875d30f478a4733a8c3c36c901. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BGA471915899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2817d1f7cc8468f10477bf626291a5e7b68d951e9cadadcffadc06c4de07520. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:16Z), 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/BGA471915900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e101c91621596a79ce712dba435b3b9bdde220648301ddd7f7290ab396a4c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BGA471915901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd52500565fab7dde47308a5b4fe7b8c3e7931c4d93593ab31fd73f2919b937. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BGA471915903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d39c5db04848a1a5b37c95d3ac5a8e0b71c84ca94d5db5165dae0fb1c1274bf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGA471915904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af332c4c229c232978363506842b3da7b05c09afb4acd6ba5269c215326245. 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/BGA471915906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52e24c9f1f278dda84402dd0701f86428ddcbfd57147bcbeb978e2ca13d0ed4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BGA471915908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc1a12a72fdc2c8e3b3acf2bd24beb57997631261f7b9977d63764ca9005f7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BGA471915909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2840a6007adf740f87e24378d784a79a1ed1107f8678e2fb2fe1d1ea9e75f0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BGA471915913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d7677a052c32ec8b97420c89253e14d2afb9bfd01ace7c0928c59755149c4. 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/BGA471915917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbbe038550c5f70105a5df4914a276328736824f18fb262a382a481bd0e630c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNJV2283463.