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 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 0xdac54518488329808c65629fb4474eb70c1bf3567c823ddd2e285246216ae257. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37f100fc-956d-4eaa-93ca-26bc6e17d49d.json and https://artists.proofprofile.net/proofs/artist/37f100fc-956d-4eaa-93ca-26bc6e17d49d.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 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 0xd520177c5ec4cc4f23813794ea7883685549c99c14c51555c0b0265ff35c1dd9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2761993362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ca8be65c246e5830fbcb8246710704bf6163d37e2b81e299ba2b62bc901557. 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/US2761992750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aebade269da311c5667f62b3cbbb130bb66082711148be3f66c89be32a28528. 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/US2761993363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe8943c0d27f44de4b6900aa7bf8ba4b8a1ed380cdf9adc5ae3fe33f8536ca. 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/USHM81885070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe68bf37738a7f8dc01a25f47d22b991b76b897183acd52ef7b9d193bba1ab. 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/US2761992749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1d77888ae0e7b4e589df0f3339fa45aa3e52645aea29b4a4f4960b4e354a6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US2761993364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8450f2c40ed3a14f56b9a33d5da5c30c544a72eccd7714764367836ffb72ea1. 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/US2761993365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cd6a9c75fb191ca3db227859dabcd996a4799c4e0dd84cfaf0b496bda5225. 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/US2761993366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ec4aafb8ddc98ca1eea2dfb9d7e235871d49cf48f5440a2b53d79b019056bf. 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/USHM21490860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bff695ab795fa34fabef482335d069c29e12d332d1dbc120241dba47efe3fd. 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/US2761993367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819fc468043e03347f453bed9af523d70b82b582f9da1def3a2ebd528154cb10. 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/US2762304356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097edb34f12033bf1cc55873317bf3614d96e52583be490f1ea340852d84f96e. 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/US2762202596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b94f4cf613c55af44657c0a922aa4e06a93b68bb8243b970e91ff7701250b0. 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/US2762202403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3a912d6c4de9793c66a2330571d5c078ecacbb6b39d8dd0aad9afa4d04db35. 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/US2762101880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cd6a9c75fb191ca3db227859dabcd996a4799c4e0dd84cfaf0b496bda5225. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2761993366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aebade269da311c5667f62b3cbbb130bb66082711148be3f66c89be32a28528. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2761993363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1d77888ae0e7b4e589df0f3339fa45aa3e52645aea29b4a4f4960b4e354a6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US2761993364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe68bf37738a7f8dc01a25f47d22b991b76b897183acd52ef7b9d193bba1ab. 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/US2761992749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe8943c0d27f44de4b6900aa7bf8ba4b8a1ed380cdf9adc5ae3fe33f8536ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81885070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23878dc6343e9e16f84906d13f9acbb780db09f99ed39becac80895ea41a17dd. 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/QM9AA1636999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f49202b9090a1b48e196ff6afd31fac9577d9851d370393b6780106360cc7f. 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/QM9AA1637000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48211bc1dbf572ae84eaf36c70f3553b2cb838e25cda05346024af2baedf592e. 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/QM9AA1637001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91891176dff77776f4157f871ca4a940f7d75ec048728f2fba7e515536d396b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM9AA1637002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814bd1bb82109c77467b84f6bd8fd651316a5995f691feebf69a931c50862b8c. 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/QM9AA1637003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7503741477fbc672f6d92decace3d8e43a4f333571fb7c383d907a19fd77c34. 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/QM9AA1637004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307a76a82f87615bd593f5c1723c54ab9b903d8194c5d7362ae9abdf0ddf3abd. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM21490859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ec4aafb8ddc98ca1eea2dfb9d7e235871d49cf48f5440a2b53d79b019056bf. 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/USHM21490860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cab43be237a22b128c2e5e59ca9c58279e610d3c7b4bc60cb11052ae632105d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM21490861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd14d6d2a223312c862f4d48f9a08920d7de863fc03f6b00b8e8e5cdf044a4eb. 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/USHM21490862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6ad13d5e48ebb4343d87c1ff35f75431db4e4f039170737551fc5836cf08aa. 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/USHM21490863.