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 0xbbc7084eb8b5e6c0182d6c1d0e189b1b98b57665c11f50469cbe41ca54252048. 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/b138a7d8-c189-48fb-a7f0-cf26d597d73c.json and https://artists.proofprofile.net/proofs/artist/b138a7d8-c189-48fb-a7f0-cf26d597d73c.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 0x5b9647d590825871373b63673ae24852726535cf7773fc193aae7acc8a0edd05. 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/TCAIC2497160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654fe86954c30b24e81b83481373c6106710b04c6b301bca82c32e066ba0cde. 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/NL5HJ2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd52de223aa7a9ffb352c6bb3602f029ee6230a7f6ccd8278e9221669081299. 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/NL5HJ2300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b50aae8824b01b9de1aeddedc7f4a89940c56252908ea491d84f93ee12b42fb. 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/NL5HJ2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ca6ff496cf664d05d987cc5a074d0f14d68c6baa56ff75bc634cae7da722e. 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/NL5HJ2300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2463a5a13e1619c4f909a81f2cd2f7d2f830938222bf53918234ae11af064. 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/NL5HJ2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f396cd476b8d6d0254dd5f8fa48f170b739ff5518148b509a20e95404e287. 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/NL5HJ2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718f81d5bc0e0f1e226a9c52fb56ceb6c6dc1cc01f8cfe0838e2796e294bbed. 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/NL5HJ2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa8ca6b3b224137013d6ec638c77ddcd1f9116c76bd99651041a8ad73c34fd. 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/NL5HJ2200425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ec55367bf0bb39730eaff6494383d069e3587e18ad48e103cf616856c884cb. 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/TCAJD2457477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486574495181f4bcd697e24f2646a10b898bd4bb9b2cf71a7780a96729379e25. 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/NL5HJ2200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407fd9cb763011ed318d30997674843b91ce6a4dfe7b3ab95f351714653f80a6. 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/NL5HJ2300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4aae979ccfda743bb6d22bfb214e1896e479166d49ba6b777b83b5cd2ba89d. 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/NLD681902272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049a90884db39de44e9472b93c654bdb19d8986a9955c876ae7ee832a264a82f. 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/NLD681902273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1625e8ddc583cac845b5db654c34b7d14876f95ac7acfbd6fb9e69e62d3bff89. 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/TCAJH2588537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49d0d0751ebbb2a41b1f86a6cf38cb8b29e851fc6a28302067b72dc125dabdd. 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/TCAIX2430958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c1f58959733b57ffacd3e8d0f7b74300204f99f27ab43574775c4c12ecca24. 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/TCAIW2460064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b25b2df3b4b3c952580cac90f77d9240ed523a32a2514860331accc4ad9071. 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/TCAIP2462599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc34c4d9d7b7785e580a362c4064884bb93e82dac2170d2c266384c920ed6568. 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/TCAIK2491598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d2afeedf6b31540b236551a6d8b95d64b282f1681b53093ae780e8c8aa6b58. 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/TCAIK2443342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f38dc66b7c151c243d877f7447fa9ab0c242cdeec7381b6730d6dbe567bdb4f. 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/TCAIJ2474288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dc18ec7a2440135f6af1bc27e4c8fadf443c6409722242183eb1cad6d25dd3. 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/TCAIE2478459.
Houd 'm in Oe broek (Sleazy Stereo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e2daa55bc6e9b8eecb1f34dadbde08c15f75761d79fa58383411c5178c892. 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/NL5HJ2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780fc7ee7ac0d36e96157b2254877609e1b2da9f2759b70df987947be0002198. 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/NL5HJ2300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859b5198902ce3093f1bf255951a9e1fc06f0e30e5e16d7f7dea24fd70caedbb. 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/USA2P2342844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832176fa2f648e7848b4f1ff3fc184d492bf483ac2064d0d4cfa2d7150638089. 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/NL5HJ2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed7f4703e7917df4f2b042bf0e9ea420d4c597d0fea0b40d950010943f15c9e. 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/NL5HJ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c6166c3bd166fac5d06d539ff7ac70018d541814f421ce258f4ab1220cfe5. 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/NL5HJ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7a1c6b66a0da8423778b60be3f74f85c14d78f0350498a3e3bf621c09860d. 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/USA2P2233973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f01ec791d46d5ee77f68367b26349931661fe29fe999505005f5eb9cc79586. 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/NL5HJ2200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909bbae580ad7122870895ca9be25ee6e89c64a2ad309ffc8e7f5851f2ba147a. 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/NL5HJ2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399a1ebd0e33eb26fe199e18d49efc6a9d677390bafa5602778fde81dbbca155. 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/NL3GQ2100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ddfc1a73749dde31d7d01cc2d937ace8b20f077c20fee45f94b1c0757fd39. 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/NL5HJ2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e488c68526078da2827e93a05eab4a0cf27afb26f24dbc96f0b225b576908c5. 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/TCAGA2283642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5555a851c0c2e96625b0772ec53689f2f3e696794e673681f9533fd365b8367a. 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/TCAGA2253081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da7a95d3bcc13a97e83ec61d21994ceb7ff1619aa96b9794d14ab29a30c41f. 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/NLRD52024524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f465a6516db4365aa39b75cd0177268f50815440fb0fff809fe3d2d30d90ed8. 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/TCAFX2148198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723a6bf311552038dfdd0b915e74c6d8f9e9d2a60a74def712aaa1d3b1651832. 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/TCAFB2029220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e2ca4a9dde6d646cea5c03fc3bdb3a5889307a2879533e81e3a2e8e5838df. 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/TCAEX2037313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13ba2be3b115312037016b144bce53cebc9fe4e3fd32a50cea9bb9da79643d7. 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/TCAEM1941165.