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 0x39b7baf974767b79513f60881852927419fcab2e983998d934e0d46d713e1a4d. 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/477e1130-5a46-4376-881f-6b1fdc9ce7f0.json and https://artists.proofprofile.net/proofs/artist/477e1130-5a46-4376-881f-6b1fdc9ce7f0.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 0xa209230de1acd5238e9c26249328d2bf15aebc12a5d0f5ea3d7ce7a1765763c0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB32E1404167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad82104180423405a1a3f8f0acf0bd6a98b573bf15ef800411ed8a1295727918. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:10Z), 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/GB32E1504069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828eff7a52bf1dbf77e4b3edcd119d81a8509364b805953bfacbb8042d11f4a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:41Z), 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/GB32E1504070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8d204236164bedcbcb4d44185b062b7d0560c9224ca72502fea8e69c313bb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:10Z), 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/FRU701801042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e703ccc71aa27fcb73c4e213b322f7fe0fb5ec00b5a3cf906159227db5f0d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRMIM1907987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de7ed84beb0fb703b23d8d12a9e4f531b03d9430068bdd66ced166cf5ddaed7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/KRMIM1907989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778475834924b7afb230e42143eca58714e3fc5b3bb14d79120211b9c1805b8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRMIM2009674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b804b9826ee28134ea37b448db1c677a6efc138be3d5007e731548a8ef789f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KRMIM2029903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd376171351af69649cc5fc9c8846833b9e1c94116abc8bbcc3c77fde01673027. 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/KRMIM2034854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e788938016813cd690bef32b97820405e1533d2a744a517734b135fae5c7b1b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/KRMIM2034856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4509fa84d8688e4f83f4b0df7bd006373bdde54cbcb67bd9122e28a7a5839881. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRMIM2034857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade908c99302489de67dbe5cfa4bfb05905bfd30c760ace3036882ee7092c20. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRMIM2334689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9629b701577588094d1fd2bb2e4b4b8ef00c48c15898ca5b741b3c2209d79b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/KRMIM2351565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137fb845865c7495a4d3ac269f2aa500adbeaa7d6650f4b7cb70cb84aafdb0f6. 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/KRMIM2027623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc0cc6cd13ae76cb14fe1094c9c8e3a6f1d3beb16780b5061ebbd566471a28. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRMIM2457154.