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 0x3393f1958986227d46160f4817cbb8abb2cf1db58d1523736234eb400fa17a6d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cfec77f-d281-42a4-b525-aeab76732c7b.json and https://artists.proofprofile.net/proofs/artist/4cfec77f-d281-42a4-b525-aeab76732c7b.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 0x366ee3a96b0da5c8b3e2ed0d70ed8e33c6def166b69ad3f7767691d5721244ce. 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/QZGLS2212856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ca32d8ce6ad3c92744f3d7f314dd372937e9d9068ff06a1bc9df16c805793. 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/QZHZ52261544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea77f36dd3e6835131aa255caf0e8e0aae3297fc38316f712b5c81dbb78dcd17. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZW9L2220867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4295c9411b7d93b771e07a6cb274f980a63086e9dcff383e126706ed73b07884. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:08Z), 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/QZ5AB2333663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b19c04c751be5684245437c7acaf94c9410bc5aef6ae806cd531bec68e096. 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/QZNJV2351459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa230e9e37db5769a5dc74d5fcf4f5fe2326899020d694693133aa209c16613ce. 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/QZNJX2399952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd04f895a113407f4f982fae7804ae3c36d98fb8d3222ae1aea96f8faf4b9a9. 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/QZNJZ2365705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cf7c59c8a7daa6ceb7b731ca0b86adcd43d9c370a7ba559e555c2f4b6526ec. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QM6N22428105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab20468423cad40898baa28f6720c435ecf884b6ff001c4f9916b63188dbd7ec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:26:47Z), 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/QM6N22481001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c31657f4a972fb17bad1c853fbae739c8c38d32567c9a46a5b8e5c54017d8cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42450642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661b02a8fa7d8be87bfd2a63d601561aadd4a763f0af958af83d724d163da2e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92423726.