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 0x416f8f1ca4b676f52e07d7ce9d70dc836dc3c5e4d184da96fa5cb618cbf5e31b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75c4f992-ca67-4a56-85ac-32e940e6495d.json and https://artists.proofprofile.net/proofs/artist/75c4f992-ca67-4a56-85ac-32e940e6495d.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 0xacb9a3966f2532c4f2db8d1fe4363bb2efcac1a7d2440033fbeb79f56ae963c6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZCFJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6385b0125c0afaf516d5d92baf10c5227c643105c6856542630fb9d54ec12c32. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZFYZ2016754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e502929af4fb4456ea2cdaf20648b8fc764dd134f592487e078bc59de055e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYY2063652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd39a0862cfbde551fdadc12fa08307e949fd8962a0585ce29679fd436b5ef. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QMEU31715700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125718f730aa8067fca81d1517ee2197fd23a4f27ac056f44511f7e1fb0291dc. 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/QMEU31715704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f4b995239749658cbeca7f0c638b561363640bacad9a2ea02d17fb3233a17. 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/QZMEN2107754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a08b99167fe110983920bf559778fe57eea96438fb4141b3cb297262f202e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:59Z), 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/QZDA82128700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bbd05c6c8bb2d93193c09442dfd43df85b12fa374cd6d93a35e595c4caddd6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMER2193083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f04a34e20fefeacfd2c3886df7ca4d45c7ee566632cf04729d6db54423f383. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES52422539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24da5676d668228f61f8825e7f66c1c0f5e2ef6f305b971911c989b5acfea27. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB62390847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf03640531c498818a018b2a76b070f1561548fc556b02c7be8a4b13d7b91158. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52422540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5394952041dc2e0bf3d57cb216daf5355416925651c7ba59f9f0f40d85857399. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZES52422543.