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 0xa20233f867ff0ed30cb1af4727c8bfdc8c290b57301d28a619b1454125f156b0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2f0ca22-d70d-44e9-9101-3423f99578ba.json and https://artists.proofprofile.net/proofs/artist/e2f0ca22-d70d-44e9-9101-3423f99578ba.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 0xa88cb937a6cbc6347cf148efa7e0aeaccf2fcb430cf6aee250155f5ec9707ab4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GXD7G2538569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544712b36612cc264cb8330f46ec38660b8de37327ddf0ff6b7b98fc76107fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2514232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c611ab23d913e6c49768964c61d3a119a2c6f3f304b58a22190b37d79e3a55. 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/GXD7G2596367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680b89835307214fafea2d6a8ffc0251fc031bc17317fe5813c89c725ed6a0a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXD7G2543521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf45c95cbf2682ea126287d39156581e919b2c97490bec12f4aa926e940103. 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/GXD7G2533543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784395236f2b35c872a2c9be03d89ed866317d3080389f6e4a9bc7f5a1b1fbaa. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GXD7G2564671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684f54e3cffebcd227aea38a72a69adbd40fe3e0c980abc81a82679dbfd584b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GXD7G2565052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e3f0c16e89f8dbe96af990543a54806b953dfbf2c18424ad46c6a327fa791. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:16Z), 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/GXD7G2569855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa5dd6c64170df48d1d38a12c3dfa810a4562f680c81a824b6c96107beee0b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXD7G2599001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db693fa5cc199f7bd4545f97cbe5b92255d48725424b45b088783752f4fd3b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXD7G2562809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553f5ea971ea9ee5e4e3c083be844f868a569b576c1d8cefca58f12d992b3cb. 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/GXD7G2547878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aee0b84d0b358927431f690f8ce4627b9e8ae2b19d6f6ae4a378f76f6706fb. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GXD7G2556617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62928ac76ebbb9251f2208591f5b27206462dc8ac4602befa0df3116f79f3dd. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXD7G2579536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38fac190d3f291aa9c33b877eb74d71751dda90e227635fa23c13a2fdc9124d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:23Z), 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/GXD7G2546384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf56a3498e6175cb40373ff69d48dd23eb8e1c72cd442b05855801fe9b9afce2. 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/GXD7G2587425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f2c4c3b14ab25369c199324b76b342f2809e6db5b6eeda34733bf32c0a910. 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/GXD7G2594946.