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 0x43378cda034175704b4f0f1f953383d5824d4c05acc5b93892918c33e05976f4. 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/1021b288-49ce-49ad-8980-56d7472af8c5.json and https://artists.proofprofile.net/proofs/artist/1021b288-49ce-49ad-8980-56d7472af8c5.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 0xace4d23906532a93e7805627f6be1ff761bfb88ca53f88cc77090e430f7884a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFK2375658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c5a39a9bb46d1d1acf3ae140e3a29059895a87f7409142580bf83352b0819. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZWFK2375659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8081c9898439b13a9bad736b86a76b732c3ebd780cfc775912e499e637d47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFK2375660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3d4abb35aaf4b84e786b6ad534dea12028f2bac83e43eab1c7d2efc2c53f03. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFK2375661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26949c98b7322bc00fc814aa824eb68305ffc4d7c04e10d879e72cbd8d1a553f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFK2375662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac83474eb1e3a6fe9f0229b1eac7a72c83a9fe731ef698c7fea8960fd35da32. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZK6J2492849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15414323656b08141230e7795a3e9aa5a8025db6b70b2e8b0527b0c2510565d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAZ2554009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43955c076c69fb9727a0d19f4620173a2b1617ea42cd84f67ced490c2761cf6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:33Z), 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/QZTAU2552065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754724f3c7bba6d07065b30a9d4aea7b48295aeb2379ecf43a7af7be216ed7f8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAZ2554012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280691640abaa973521320e383615df8094ab42b868851cda6882a32e73d0ce1. 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/QZTAZ2554013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a056e51e9974a42ab947d7318d4be665e09a07564c4ada3f64e6ef085ca29. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAZ2554014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060ad2c67f75aa31c28787dd5446fe72df0c2251acb74215e5537eaf9e76033. 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/QZTAZ2554015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24182f494550f2fbca8403d5a4500922a1faf5d192098caf57e3408ce32672eb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTAZ2554016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e0d7537b48af8657884cc75802ffed91d65f26c30bcf99fe938b2a490bdcc. 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/QZTAZ2554017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca65c971e68496008fa99d25a707f5cded3e7438fbfe1f572c2620ffa7fc799. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAZ2554018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf12cc8ef1873c4bb282bdf1b1ec4a9f7370f04749f7d6d8a92e38020dc058db. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAZ2554019.