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 0x0df502a45e71a5df78f25d267a423eef3842b1a7c76c779215aa885a86cec1bc. 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/c30473dd-e22c-4ee2-b22c-c887ba106e31.json and https://artists.proofprofile.net/proofs/artist/c30473dd-e22c-4ee2-b22c-c887ba106e31.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 0x6a64f36498a128a6b0f58e48e45d3beaa525061c8cf76ae465c2c16a6e634b72. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GBMA22452748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb203fcddc42d3d626da5627033489765a1aaec29249acf6f462a7727460dcad. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBMA22452750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898ea34dd3d61829d37608ac4ef33fe3e9191594544f9cab9d1424850340dcc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2fcca34cad324d68e785def6d82459f966c4bf7958d12fd023c14f1c5416a0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a383846acd705c69d71c864cae13165077de03ec1bc4d27f57d58ea1ded52ad. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:09:09Z), 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/GBMA22452753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe833501215628436c97009d9c2978f7854772bb573eaf6a653b342b1328fbd8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:09:47Z), 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/GBMA22452754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9361616f5dbdd931100704c3ccfc9ae2d251d98119c22f7f761e7b1ffa26821. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBMA22452755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e729bbdeca2d94bf363835824e44032e3fd23b158c9f9d729bc0e73d41a9f08. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22452756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d9932a9f736a9f3363b83e64631b1bfa698b3f4739fe2333b7fe2bc1a9ef3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBMA22452758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052ad9bced5a544a0bec3649b5c3a6b2ec882fdcbcdf6ea20ee617075259d048. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBMA22452759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d57954e765fc647ee93fb22be4a58de690cceea9ed3e82d9220554b3ed5b36. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBMA22452764.