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 0x5996c4edf155048e6f0c05e7f48ba9509dc9d90214bc05fe945aec02ba2f3302. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9f1c073-4c82-490d-8db4-6ea67cf2ba1c.json and https://artists.proofprofile.net/proofs/artist/b9f1c073-4c82-490d-8db4-6ea67cf2ba1c.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 0x4077a05cce8dfe00db30c110d18dacbdb8d02574f37fa54618cfd78609c92767. 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/QZHN32256533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e020cad91b1a056f58cbb2c034f99afb89cf6a6e1d41c7f333a0a554a34216. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32256535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde03c812b6cbdfb878801fcd42d551afc829ef872f185aa421f1696043f9cfaf. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:01Z), 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/QZHN32256538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab019f6196d996c1a85408f59fa5ee210c56feaf1bdab10697ccad16e020f88. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN32258325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75242345d0585ad6f791d1a7366882c62a4523237ed880f62b27b95ed6aac14c. 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/QZHN32258326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be5267a2f1198a9a210feff84a8c00fde3915fb56e92bc4a70ad7f145cd018. 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/QZHN32258327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad04782f9bb331570ea20fb3ce4ab8847c62b304f106b352a5ea1549ab3f746d. 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/QZHN32258329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46288d048bbf97e358ebab637216fd82cdd16c1bf7a788fc96d663f7806d013d. 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/QZHN32258330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8657dea20c34b7e49beed994038655626dea1073a5e72fed145d3ce70513b18. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN32258331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3a47033c8e752679eb3ecbe1789ccdaceb3cfdddd332ae0873a5d3293fb7d8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHN32258333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76d621ae4dab12dcdd1e3b20a0f1f1b7c00854388f140b1e5074c8cb19fa282. 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/QZHN32258334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565ac4c79cf964f505de32c875d2f5404a695f63caa6187737d56ca1814034ec. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:56:44Z), 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/QZHN32258337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29b5ec492ea438423573386086c2013ba5ff2546027893e5b3e3fb4e5202e6b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEM2207407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf212bdb28cd1f02cb97679e97831816669fea094cad97ff6245145f1c5851d53. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:36:40Z), 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/QZMEM2214361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae18250bd58864894ed42ad5edd9c53101cf3a9d493f451493e24058fab7e94. 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/QZMEM2215147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4325a6626ff9c52c6b940073f1202a05ff7ea0c9f7e6a76e3c15fcc994747cb5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEM2215148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c990408cbd1666e395b022ba24d8dccecea07b02414eb8429ad59f9bceff309. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEM2215944.