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 0x490a2f5dfa97a50bffeb0d19ea0c3697a3b8aa94a64a19b29abef9a9b85bc1f7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58692e2f-31f9-4769-bd9f-f899c221f3ca.json and https://artists.proofprofile.net/proofs/artist/58692e2f-31f9-4769-bd9f-f899c221f3ca.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 0x0df571948213d5ecc3a53eafc8f2027ced9912cf240d77b85dea8ce9a6e300b7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDY42058685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6637a7f7259267a705b760e36b269bb6e66bcda81c6d639069fc7a077c5cf9. 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/USDY42058687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb856d0546864f14a4dbb50f3418cf7f0eb334fe6702501d969349c83cef8508. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY42058690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27383a2e12145289820c1f7bad2df7a1e1e9a9ef42069298763171a20656e3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USDY42058691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc707f2c38b8b3a5cfce219af12286173ff506a94f31c45530bc771a896478ea. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDY42058694.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d65914116f9b60d4ce047fdcc8bf6b591871f0cf42a4a3b27f4ef612677a77. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USDY42058684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae9144cea2e86ca43b19ce509d0d7b85d897db2a4af6702da9a6c93a7c670d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USDY42058686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a80d72f1217da999b7c4785778bf1ae79b75aa20378883464a3249e28ad8d7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USDY42058688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d6f761c5d7e945de1f62ad16694cc46aaf685446fbf00bd9aaedbf867914bd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USDY42058689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192c839f871ddc7535173cb2979013c56b6fb29392defb34b49cb0fe4f8b4cf5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY42058692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef75e00bebc45d2a2441fe4d1039ecb9784833f056f3589e46109989d4916bb4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USDY42058693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d2c1f8a1a6000e827a0425e117816d9f135b58180e2a7d47f1f7fe3874ad0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USDY42058695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc99e24d42aea161694fce23a80471675ee6ef628e9761d5d2eeec233455a28. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY42058696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ccab5be2643f367ecee2e7f7f7aaee76b63f9a23acf330c54fd56cd768f21. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USDY42058697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919c5acda0e355fe61f876722159eb7e5161ee825e8d096c459e0c56edeea35. 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/QZNJW2437418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53ebd103553029eb28100cb396a04bdcf2356410ba206048613e19cdc35b460. 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/QZNJW2437420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1a541a23bb0603e94e00f0b97411b2b271b15abb859336792355810cd434ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJW2437422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf09d4eaf9022ed27ab76e36fc900940cde82e9457c9b88aa6b14045cc2d2b12. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNJW2437423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd345e0c15d45e883a8f5bdf8c26790ea335dc66f558da18a875913bf53215ce1. 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/QZNJW2437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ea2ce49db7b57b46b1715196120c084a798bc5064dbdac0e3c4d818cc15bb. 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/QZNJW2437432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d4d51d495ee6b1bbf70a20eacc441cca0e507d79bee3ae23b541c53c6eb039. 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/QZNJW2437434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b52fb580299c5577a2f09c365e4c82f31d78a6f5b7e131e3cea7f9f520968e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJW2437430.