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 0xe5480804c51ecb208a714bb617412119b7f43c0c44028bda3b23dcb20403242b. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9886d7c-8f53-4616-903c-1c1129590f06.json and https://artists.proofprofile.net/proofs/artist/e9886d7c-8f53-4616-903c-1c1129590f06.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 0x8914ec4831eba97a933d38edce98b2179905f20cde6c71ea2be3558df6148029. 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/NOHLX1757240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff4ce85edd688d1c05f77db7fd88bce0a2f4b6d9aa2e63cc7e97365255942c8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NOHLX1757250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a00dafae0ef9be634a157b05ac5a3c87bfc7af9f1ddc243eef82a97ddce5ecf. 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/NOHLX1757260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6d220062426299f9cfa1dfbb59301c022083164e12edc13dc158d1eddd950c. 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/NOHLX1757270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b58da25689178467b2e39885ac04e9166e51a095ac10b7c3972907ed95301. 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/NOHLX1757280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ea8d7cd796785b274929cda924491e95385b09a85b82ec7463055d74b35706. 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/NOHLX1757290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058943a37c697323c11c65c35257b216d90cedeec64d95efc95739139546957c. 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/NOHLX1757300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccab1d46bfab4c289a27baf829e5c58a88a5e18e24cdd2ee36b43b830dbf39b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NOHLX1757310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a100e3315f5dd1ffe14994a63c96df3de589424214743fb840675996578a0. 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/NOHLX1757320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1068e66b6b8c4bfca7fbe4c8b960258e1e7085b4fe51c4faa04d9090a473e8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOHLX1757330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f851d0cf878291d1d6b63721d59e35bd01febc81a38f6205a1176188807f5. 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/NOHLX1757340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce07c91deb39b68e7da6921a23e0105d835162d42aeb72ee3100b99aeb82831. 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/NOHLX1757350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08364588c18c5303bfbff3ae32e54a88b06804fcb611deee29cf8c418913975c. 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/NOHLX1757360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90bd060c4d4b8915967845dd3fe739c1c8201d1f6058089a10e79a4ceadfc41. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM6N22452067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468c88d7ce2392cf6409690b650bb68b237990181c8d759a002c491b591768c4. 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/QM6MZ2399826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fc47f980021e0843f1b7a93a7316533737aba7a0475035a1dce047e67fe23. 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/QM4TW2163039.
Bare Glem Det feat. Sowdiak, Pasha & JNS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461340a7788061e78efced6cb8e5878014d9560aff630d5b6cf794989f7c5436. 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/NOCKK2025010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd9d5c51922a6cfe432af44c2397838229461d253c46edabec05ad139976a9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NOCKK2025020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137efa016f9a56cacd8a451f05da7730a135fd884b5df6c1f04716275187241. 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/NOCKK2025040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a9dd04abd1ed014bba430abe66b016fa5dad1a1c58a12966366523e2de473e. 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/NOCKK2025050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677849ed6c517c4e1c228f6289db10a321ff0dbf0475f03f760717c08bc4859a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOCKK2025080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2807472920656d0076c342d446b0a48e7982b448dfc57170eacc113fe8a5734b. 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/NOCKK2025110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a62a5ca9c7511fd41019f4401de100f7ec5b4a91f41c94c1a82ae14f6ee5fc5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NO2YX1506010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30d19f0ce1f4fbc44612fd42208c2a4e69979ef07aac1b74b29c56bbee401f9. 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/NO2YX1510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b732348a8c8f5565ee0c04211edcad1df4e1589fec1a083ae0837c6403c77. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NO2YX1515010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d232a73c13f3df11511a3058f0d046e2dc7e16bdd67b8aa34be7ab2ae80df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP1590797.