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 0x8621768c85a86f163bd4c5f7149dcb9611dfc7bb16370c809908e2db9c3f8d3a. 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/c43fca95-4609-49df-8406-fe94725598c2.json and https://artists.proofprofile.net/proofs/artist/c43fca95-4609-49df-8406-fe94725598c2.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 0x22580f3aac8fb878c192d41ef9bf56acf98c044f000bd49d790423de29609827. 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/QZNJW2031527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfbac3de60971a74dbde4deab6502b758b0b88e5ce419dc5c2d486b9898239d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:16Z), 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/QZNJW2031528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902883081b9b396944b3a4bd535339f8be30e8aa672a64268a73a21f1333e7ce. 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/QZNJW2031535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a10568bd7c6ccdcf6e76493e630a2d532d02482c8cfac9d11ca8728a47a1de. 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/QZGLS2126856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d79dc467b3235d876b8cf4965beee27f0c5cf8159b6871b41a590ae005d2c. 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/QZGLS2126859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19844106a3f97940a7b402e03ea06b9c4358217aab49736959e5732b3491164. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:08:57Z), 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/QZGLS2126319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10e2e26a24960f92034c413183bf0e2e98dfa944e3cd19f33441457c5b3489f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:11Z), 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/QZGLS2126320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b5f9fe92c5a0bf987a994bec2bd0b2aa73cbb8f143fa549364c63c76dd4f3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZGLS2126322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b5562588d81592230064d24d38806f13674359bd220d07243f7383bad1535. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:25:11Z), 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/QZGLS2126326.