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 0xbec622bd7ab032c3d784fe307f9fdba40b0fede9a50e014555f5a5c4a212b7a1. 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/0f099dee-ca52-47ae-8e42-8945bd9a3c6b.json and https://artists.proofprofile.net/proofs/artist/0f099dee-ca52-47ae-8e42-8945bd9a3c6b.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 0x04715c32e9562a77a2082156c92afa4175a935899e975791266ce05c1694a2ce. 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/QZNJY2235005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5806a6ca614cfffb705dd2dd8dbe337d127e1445cfb6319b1b57b806c8fae6. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZW9L2237134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38dabfe1730583def734d86380895a09557f459e8ff9909f573e8ae3c4553fe. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QT2JQ2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b04cc968dd8447e63d7bb9b86fe276ae148efa39c483650d6b7c54e2fbcb9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:41Z), 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/QZTPX2472082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75a727ca311dff2bbf97ad26355d166a4a55db1b480521dff193cf6092321e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZW9K2489650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ab0d812b554718ad08f0f4cda92dbdbe8325fbacace3e82c56002c8138e13f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:32:08Z), 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/QZW9M2425861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93cb3358deba83ecdb66d1816ab8c90b78eb7124df03aec7c6771253b495e7. 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/US7VG2597702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1772dd8e48a721928f959dc433ccecf48d4b58187dd46708d624decc5e1b0d6d. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZGLM2529980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a108a1e7bb7f2496c86da84916e2902a03e862d28fb504fcec4af2ed765bd7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:41Z), 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/QZGLM2529982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3409c8f16c033f8948bdeb91e2374cdd5dad5408def8bb8d457679bedc3b4b30. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT2JQ2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc808b507d46814fca1189128208ad54ac491cde39f6b2cacb5aaaf097d85f8d0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:00:37Z), 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/QZMZ92542941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e452b62485f6690ec1439cf26893e9a836f24800c3affc04e455bab6902fb4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:21Z), 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/QZNJV2542031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdcf5e31a56792fb75a8e0216ab563b30e594992986d5b08da2c5e3347412ed. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:40Z), 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/QZNJW2561737.