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 0x9d85b696976fb024be5d3d471b8ed76cb2a51eb2db518785bc723456988b746c. 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/65bbf43c-e55a-4187-b15d-127cc68355aa.json and https://artists.proofprofile.net/proofs/artist/65bbf43c-e55a-4187-b15d-127cc68355aa.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 0x20adc8cc86ced60dd335eb1f0a318a1de3c7ee492ea86e5072df99a2f7da5fbf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNJV2235221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cf75bad38cc2375939f3a61e78308fb4ba2b7fbd7112a2216642719684513b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM82252681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4e7520e844b0cdb39ca2ccc6f8748283780ea30f94384d0b39fcccb70ef2b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM82252685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feab0c1c586e1c01f1649c1cd7605169c9510a330163aec839340d1fdc2f42a. 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/USHM82252687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938b2237f9be5a112b1c007ec9646c2a04931ad40d09bea0ba89dae8513a721. 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/USHM82252688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329333b61269bd9bd1debf293ae431ffd9a0c768a7ffe870b42bf24b671601b. 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/USHM82252691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ecedaf8affb6dc220768e6518e8f24f3263e03936f7d4251321c05ad84db6a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:09Z), 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/USHM92237873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d29f66d1dac16451f9ea284007efe554a3a58c56027873a8c151409e8636610. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:09:09Z), 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/USL4Q2314967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e57d00daa64f6f29069be1f4229bc121e1b62096cd864279f623a772f79723. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USY282322580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4728168cca2832f7061669e87dbd4df992f7c3e7f9543b31434b931c1ed9aea. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USY282322582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac4191005267f65260ff2043d505a0a1f5c2a153873524335e08ce11ac0f75. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USCGJ2453354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7055d6f6431ced990fb4982b6214f9602d2ec338599005d1720b23b27357bc. 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/USHM92433079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9930b423681db8af63fd470a99aea505e33dae30fde56baccf8966b9b6330f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM92433080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2542969330b1b88483235dbe1d12886f1a97c7c3049dcb4571fa432902aec8c6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM92433081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3db3574ef644a9a41deb9c0112c97539a1df1cb38af63ae99dae1b490de6fa. 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/USHM92433085.