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 0xc47b896664ffb8cc5e65b93fdb320d20a6866767cc41658c0940cfcbe1798a84. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f9e635c-a3d0-4ac1-9be9-42a411d99637.json and https://artists.proofprofile.net/proofs/artist/6f9e635c-a3d0-4ac1-9be9-42a411d99637.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 0xc5d1d563e063fde9d88692955a030af7ab1bc186a62c7a9b274c4f5f0e411790. 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/NO0T12026010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a059e0c915011ecf6926437e4b7e06981c4343cf43bc15dec16bba295527ec3. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NO0T12026060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea4f5a3e9b9a4073b05f1f5c091c095920b3df5ffb6e87d9188dbf03d52a257. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NO0T12026080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee648d44d160f288403926660d29ff9b172fdbe398596d3ec91f20dec3b9ab1d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NO0T12026120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f48f3e0b1c014e3871fee4723f40712f79d0f1d7ae75e3c9da0562282554cc8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NO0T12026020.
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 0x98e4ddc8c3cb4cccd02a571361bb04bdaa20bfcb00e67ff53aebdd32cf949283. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NO0T12026030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9661be8c48eae04c57a45329a87668c4dac57173e785082976eda2ace7ee1f05. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NO0T12026040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a270992dd6848011df06c5326a63313ab34e533d9204dd50f3d98f41f4b9f. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/NO0T12026050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca73b9696913c4313cab1f9c6e5cb5541883658a750628c1977f5b4f0bd7cf. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NO0T12026070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4a11c116841781081476fc56205f49ee63f91fcde91609db303b2b4846f46d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NO0T12026090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3117f3eb94ccc94c96714a27cb589f6a202582e5ef21c83b35387c32c482ee2b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NO0T12026100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcae812ab08b4ebc77cb0fd73b953671ac9c9aa49ffbb5b1c16685075696645f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NO0T12026110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff9c5052364b3cc1b2604a586bdcebe567d1d1bdd5ee4a8e5e150023a2fa88f. 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/NO0T12026130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e2f6b89d93286f7f603b7a66b43a0f7d24c262018048041a46a888b51c5ec. 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/NOO1T1401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabdbe231eb83e401598d918e52100753d598386f0a7add9a68a2e02aa62db29. 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/NOO1T1401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccc69394de4f0f09ad4397a3748bc3cde9867c18a01344f678864799f7766ba. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOO1T1401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab7316b007a6c73a7f25c7b8477ea0162f56c9113ba5fd98e88bed6a81de26. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NO25V1003010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc4af39ebdf86c5fdc9c75dc88334ed0bde13dd0ff097fae2218963bd89c5e7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NO25V1003050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ca4e7e254b04224f08de20c79de2d77cff23b54c7c31c45130f62b27f3997. 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/NOFLL0308030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd0572ca97288b9ad274b2d4e3067e68c2eef99603d1d033a7d46027a4ec57. 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/NOFLL0308120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6799bf481b8ddc48a58143083d555e8b95717e29a1858a1e6e5edb64253f8. 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/NOFLL0308020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3e3ec101cbafaa4ecba682ac84838f46b7f29149272d033c7f8f6e63be5ea. 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/NOFLL0308080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5272c1ee6c9267b992e28dcc026605a3551cc0db992fbad0a6b1e3bcc7adf. 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/NOFLL0012020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bed4fa70dab2643cfa7644750bcdbe09a362b3fd994f1249845f87d5beafe8a. 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/NOFLL0012030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68079679a9f31204fcfe5d46ece4952a95c180447dd80fcfdb9c9474ff1f35e. 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/NOFLL0012040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaeb888904bc39363d1084a6fda8499ab69e06d567ba71d42fa4bbfcb1b70f2. 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/NOFLL0012050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a553143b979e1a2d26f4659df09f0b99505d4e9f2fa72d393e30c1399cf425. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOFLL0012060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d860b3e4d3c8b177e0ce4da9bffe9281ed33d15d4a4d14d35c591dbce87af. 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/NOFLL0012070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c2d94086c45148c5a9b62d183e311d62fc5d4f466751b10becfc932cfaba3. 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/NOFLL0012090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7616dcc5ac4e7b700e4117a120a928c7fed1a7558058124f447444282d76a8. 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/NOFLL0012100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb1f27d426e0ebee6d78fb56db73222b36f837c6537b40e2997e7edfc759bf4. 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/NOFLL0012120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd309ac605d0b59ef59615b576193e820204364b1eee7b19b44bbc68ddd5e6ff2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NOFLL0012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d535648125ecc415e97e2d3f92cba865b64f5bad9aeeee3fb1253e7bffee8bb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOFLL0012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbdf495d0eacaa78654bba1f80f627598cb9fa27d07b38d567ebcf54ec21e9f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOFLL0012110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b22a1bb1ee4a44bdbb443c0c36437b2b942a282551873003ca5bec8e17a0a. 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/NOFLL0012130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab0c72223c1aa7d440eae8e1b105fde89c5fff6e552ae8b018586cf91c4a3e4. 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/NO0T12112010.