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 0x221d3fd2ed1acdd7d529759b852f5c9cf758738a5ebb4141cd789e73ed9e3fed. 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/cc3abef1-9b14-4dea-8782-3177e1ad21e6.json and https://artists.proofprofile.net/proofs/artist/cc3abef1-9b14-4dea-8782-3177e1ad21e6.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 0x1374ba2d3bb96568a1e18efd7fa366b9df03c7ddce84ea7ba98ccd8cbc37c528. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFR52100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ee3b9d6bbb96aad093b056eacd5e39228f99fce51e313b74e06417fe913b1e. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZFR52100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd324720b4ade553ba63800495f1f7dd5fbd19cf1793e4d12da2d6bcf34735. 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/QZFR52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd324720b4ade553ba63800495f1f7dd5fbd19cf1793e4d12da2d6bcf34735. 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/QZFR52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddaa714a3257065c013f2f233eba44fabf0fef8675fdff8d378573f7b9f53fa. 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/QZFR52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7819bd7297c027c238efcfc6d1dab641289eceb3170b5b879afe6db6e1b64fe9. 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/QZFR52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596d02e127a9befb2b374006f6ae6ff7ff183e248c231192c804334c5402f47f. 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/QZFR52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb37277880e373fc92fad9a28dac29a57249dfb308f09196c5bc055587364c. 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/QZFR52300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d1042310889d8cbd2c13ac7ade2dbb59eed018abb27895492fdd16a12565b. 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/QZFR52300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b851ca4c9d5c2c3048bfcdb7356a276f87538e6f53d627e5b9e35eab234aa99. 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/QZFR52300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe7c0b05b54308e1d7089d3c0efeda6db4c84980b3975c5e8249fa7bacd2be0. 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/QZFR52300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba30619c0e16b35c7b800f42b843111f524a27cd6f5ddb4f5aced10addc7491. 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/QZFR52300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ca2d7cf4d024b0ffaf0c178834f54092bd44533782aff6787636d53b0060b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFR52300019.