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 0xdd99e92854dae2b49a16eec683fb608025434e93a1bf4dda62a58b01b0ce8584. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd2651aa-1963-4c5b-8d31-34a9347ab54b.json and https://artists.proofprofile.net/proofs/artist/bd2651aa-1963-4c5b-8d31-34a9347ab54b.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 0xeaa108736800357f1f0990709cec26cba38d4ca9744699e4168b2db9ae5e7c9b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2082581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c19a40f8413fb67ad38e14de7744aeb151adc05001fc701f5dcc2e277b423. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6L2053039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe56879683e4c4b415b4f1042fb68e6e08021a0a4fb77feffd221606f21d7eb5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6G2043962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54f63440b6278a925dbaa1ae251a3a4d3c16e3ba36bbddad50ead9e87962be9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZMEN2033841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0cd810095237d6ec0ed71a65737a0c9fbbbb6477a33719b8f033fb197eb29b. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:08:43Z), 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/QZMEN2033842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef6b8fd41f45f2e1158cdf90e49e1822d3edde5eb4e4c549affaeb6ea62950c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:02:13Z), 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/QZMEN2033843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d832fc29e84dbaee56935df96e223c853fb86b6c2e44520105b45731458dd5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:18Z), 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/QZNWX2089858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402ed883131787e5cad8ffb17dd33e49e7c117549fd6d483c697b82bab011219. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZES82130314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f0291437bf843a451807bb567a6dd3ae249a68eba1bb3fea07ea0d285894f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US3DF2156804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079bf6d44a4ea7c146efabab533e30a9e1619515a3cd156331a0fe00dbc4026. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:28Z), 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/QZK6G2173116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0038446d9f871a783816307ac019f53758094e9c3d954f20ce3075fd13b0ca11. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZNWQ2132333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dc4bca486d2d56d1dbb7888dcdaae64fc0c9e2a72dffcad16fcb610fd0ec7e. 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/QZNWS2106581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a2162157e46a587311b17da626f13b044ad18e6814d83e9236744c8429f8a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2187160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b127f3d95c3dc1fc7fdfcbce4b99a6b8cf5e64501b962df46cc4cad52dac6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZN882135535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083a53c9a1091922facdcd01927d3856c83c7611e786a9cb5db31b3291dc07fc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL3JA2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a427f141d68eab23e14092b3e316e28f604897d162939cba60cfb4233a53785. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/NL3JA2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f0003e8dc95b827ec9e4456ffe5c18985eebacfee4297c5d0b0591224bc3c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZN882215335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba9fe23554c8a26bda06f0ee3193797a934a15d37cf3f6b3a95e716cfa2cf2. 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/QZN882224629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba272ef9cc5834c1647b72a293bec4eae99be5566ba4e675c22930479e8bbfc. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:56:29Z), 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/GX5MX2252894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d9941b8f450913133468f75ae3254cd9d7108ddfe95bab524c6ac48f3b8f39. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX5MX2270317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd602ad7d807acaa8daaa1809dd34298bd738cbba3a1b788bb1c3959f08d3fac0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6H2292877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff709c25bd8b011647698bffd9c8376e4c3e4bd55904304e0eb193c5135ef0a6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2271314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd448b8941bf9aaeb09a6b01980966527eb61a1cd6e3e06a28fc7a871c6e835b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2222119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce09606643709a1f62825e3ef183b07bf4292e7e2ada9864163a4940053ee531. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USANG2227878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44a2454b714be487a4158bed373c67d834a04457d05645e158899472ea815c0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UKZGC2204198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99d1ef50d2375c0db97b0da7acd84170f9e8393ec47b43e8a598e8142ef682c. 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/UKZGC2203944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4365e8f9610aa223086d39afcd6839712028243d9ccbf95a166e00860ebd67. 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/UKZGC2203836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d86bdc9b65d76ec04d50e1d8fd82a4fbfbf52a6b023b1dcf0a80d32e5b2698. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:03:30Z), 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/UKZGC2204195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf209f3c4a9b6c6a9fe2296f6d5c1eadfc934b92b092a25a255d8fce131add6ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKZGC2204196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5c34b239dd3b645a568ba0f3ba2e4c24da04c782cfc85bd79e9e572d40461. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:11:01Z), 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/UKZGC2204209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89678715d2abadd3583f199e03697c1a854cdd56452e3f4e4941062c819cba2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM3DF2203450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41783b0a6e53b97553940e3fc96630f8ca485a52c045e7bea20215b30287bc4. 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/QM3DF2220393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb298ae7fd8e8f543137d4d324afe2afcd136e4d8559237957878c55eed4801. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2224816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1abb07a7418d52d35ad5f40fe8f14484c057620fed6e345a47495ae201a67d0. 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/QZN882247553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8b51cdf1be650041d6a7b9d4dbb3eaf99272c4553fbcc04c4ac79b751722da. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZN882184851.
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 0x0ba54fc52dacf9b36f63052f1d14a34f57c0687fd0cbec64f7c7deca2cf5f0e3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAHT2100789.