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 0x868ad15683c1da3619db02bfcf58217f5d7a3ad8e9015417441331f5a459486e. 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/a3f698a6-2f70-4be5-b2f1-f312c206d7fa.json and https://artists.proofprofile.net/proofs/artist/a3f698a6-2f70-4be5-b2f1-f312c206d7fa.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 0x8d6d8f34bc5a4761d2eea9167532951ea1a45334c343655861572f8180fdbd28. 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/QMDA62312495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd4bac703337c942958ece588d286cb61e0e6ebb9adb5e221aeb36cd9a2d442. 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/QM7282459661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f9201d9edb7711fd82d00422e67958326efb38cd5bfa30142de9a7041df14. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSD12400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc13a8eb7d0aa27c7b901bb500f686eb1221326b339e5fe8d6b8842464c50bc. 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/QZNJW2497569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2758d18042ad31da589eae259c74fe20cd16b520c686e86f11c96a3989dde6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMWW2484259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c661bccaa0590e8be948e4090d7d769247c9471681a098dda96b0e3b89a8f. 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/CAC0C2300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91cc45c6cafb665061a3152dea5eabb8133363274330713c3bae82a99dced65. 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/QMFMG2320763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb00ba80cd135060ac1e3ad91b8bc9c9b447ec89d69abf42da5e46bae98c7a99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFME2370401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7166865f29ab64a0f98b04bc757861ce4a350e0ec5f8a1c61147e2e84cd5cd. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZNJZ2337027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7b8f8c09876e8859674f9f5ad4c5056fc1ee4893a977c854fc589e0125c21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2379791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ed0c39784f4db396a1d31bbccad3353409def5158ab80802196ff6dc7f9677. 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/QM6P42377266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2af6722c92bbdabc0d73167a318e54a7d49f05d5b1c69eabe6200e919e026. 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/QM6MZ2308395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c574d1a714045cbf703ee391a7baa02b244ca140e91e79173c2f0fac6692ad. 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/QMFME2262028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c32f7893fcb2d220e640d288fcf16b15bd84551f02d9dddfe3b25127337b3ca. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZNJV2234951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59b2c49551ee5e7ded875d4c6888a3b0ef017287bdf1615919829c5f243d436. 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/USCGJ2181969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e37d28b2d372a061582db8c29b1a8aeea329c54a59d04453689e7f86b020ca. 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/US7VG2592848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419e45f68cb99059aa4ef0548d4b96cc9d15ae4301cc538bf0ef061c3ccad9a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2509413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3728b8d06b2a2c3ee69e5008f0d5093d92206671ee23dc5db7634e01573fe7f9. 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/QZGLM2507684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af7203c5d8366774c09c63bfcc8e852f49c9efce214d57d8e707219143e70a3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLA3H2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0dabf7a7685b447d392f1ed604dd401e42d7845bce7acb054b563b087da4c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2590761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74d564fa8a01c429900569de755597fa7f7bb0e835c3c9265bfd8f0fc2b4e24. 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/QZNMX2438061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9761861d3224fd12bf4ed099a6a364daad8719b3b55084c6156f6a90ddc4669. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNMX2455819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3cb7f3bfad127b1e9fb5d94ce973fb60bdce1213614b2fe560ff8606ba155c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62479305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f747fd55f8310dc7ed923488f16b182eee78f0963c5f54892612156b446daf. 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/QZFZ42438056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceae65712ae662f60d9423931260c730d8036d43172bb2b759ab8a2437f4927. 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/QZFZ42436896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327085bab7bba652f75b3fe8aff38c4cb472c914994bf1c99ae29ae46daa7cc6. 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/QZHN72354237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26a45188757bc0b1e3272c4bf3b0840b1f4a439c8458e7efe2c72f02544369. 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/QZNWV2113880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dacd95cf20194f9f19c286dc3cec46f188e6fc8ecf27c9a129b8d27c87d2952. 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/QZNWV2113413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2982d2e3a86d42ddae14852313edb17282dcb465906ea47d26014a21c92db964. 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/QZMZ92595345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f6957d1f1334681383cebdb67f981635318ac5373d1f6efac75a7b55716b30. 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/AR5UH2502479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfabfd5224464c33a4cb4504aa88bbb1d00aa8a7daf9cdc1e518a70666c212d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR5UH2402084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c661bccaa0590e8be948e4090d7d769247c9471681a098dda96b0e3b89a8f. 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/CAC0C2300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74028e2aea95ce305a0869aecd7ab0ff0111934a9603a347b2907bedffb5a830. 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/QZW9K2292201.