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 0x6404b8bac41a88870466a79dcd4758cb856713d4c8d4afc4711438c2c330c212. 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/e8750746-001d-4375-aa5d-241876626c65.json and https://artists.proofprofile.net/proofs/artist/e8750746-001d-4375-aa5d-241876626c65.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 0x4a675854b6b4aae1707e5dc985858cbec653d13ce1157bbc2ff4501ec311da72. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2213125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04234d6319c86fbc269bb95758d19a06224426a7283e146940f19ebd0a03f887. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES75E2407440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37974698232ae48e923a62e7240aa3f59a9d4a9dbbf719368a2696d664ec2d34. 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/ES75E2403669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d431f1ad00acf00e9649540980fc6992f459e39722862608b8bfc2f423b6ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES75E2304165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb66f578abd47c46bed038bb9be91038a4c12c6618dc1ff26a5724849ade93c. 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/ES75E2301921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f18a5e5b2cb9b92bd29c7171230d30d6f92140d4c3e778e434f9b324aa01c. 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/ES75E2301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0d9f2218f48df45aebfe46c60d58f125f973dd8f88999d7f18fd9f592f596b. 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/QM4TX2213121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6306da48dff7b3526a3d1c3feb8f0559c97792d94290bba32d40706fc108a. 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/QM4TX2213116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644a368b3a0db199f82cb821b3192fb411f572e7e8eb911d264af3fb6e675e3c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMDA62155601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bcf4d733282329f8a295745689c73ef8c78d58a0eed2290651609dc52a73fe. 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/ES5702100926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf82a2244e31428314583e84098a9fa05b009455a65ce2e2c99c52489f7b3a16. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES26E2002601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d1b54bfd5fe855426d5945e39f494f63e1fb5b1ac8dadce3e4f17c7d21243. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM81977291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed8011f0775aa4ea931f2903f1095a6919ccc1aa72ad6c57f05fe697f3db62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES26E2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b267104881f143778655ec77747e7cc0f6172d01aeed85e25badac651a0dc6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES26E2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727d31714e36d8089255d67e11d7b4ad7d8c200bb389214d32cd30e18f97870. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES26E2001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b267104881f143778655ec77747e7cc0f6172d01aeed85e25badac651a0dc6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES26E2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed8011f0775aa4ea931f2903f1095a6919ccc1aa72ad6c57f05fe697f3db62. 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/ES26E2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d1b54bfd5fe855426d5945e39f494f63e1fb5b1ac8dadce3e4f17c7d21243. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM81977291.