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 0xa77ce582a884aa90aaa8e79c2dbd6dcdbea4f5e9bbb7190e3b5c53fed87cc161. 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/296a294d-89ba-4115-a012-c456b517a4e5.json and https://artists.proofprofile.net/proofs/artist/296a294d-89ba-4115-a012-c456b517a4e5.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 0xa0df25f506779ab5e654a45af0f7d64a7d00ad56fa8c2cb3c67b9a127c41fce6. 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/AULKH1800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7fcb65629c7a8be47a517a83a8a7f07503fbfca04e864c14c25cc8e903ec50. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AULKH1800163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6268b3faa3c57b89af84add0bca6f530429889ae3cba58d42ae88e17a5d0caf6. 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/NZRI11101939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6048e16a9525de3f6e439a6bfe8ab1c16e1dfa0933f09a21c2ab2851d0e59. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AULKH1800165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2771bca99b7bb11de09574ba0e92a523679c6a9f22990ead9469643a460c933b. 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/AULKH1800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1ec3472c370b7255d5313fbe30ab13916fb39096e048b1260c3c7695abeb1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AULKH1800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ac9caf83fab4aaa6f16dcca1241442f61afa24a7f712d598affe82769c475. 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/AU5X21100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289c80e28058ff307866ee61cd8f9162d649ed3f36961098f9a5e576bc15ab99. 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/AULKH1800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5b60501973da22481dfe72ed8f1a69332d7492902d80134386ffa93b3df172. 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/AUVR11002484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a01e65b8cd22bd48b30b8c77bbd50ead8528b4bcce1f701d5eaed44edc93281. 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/AUVR11002485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f3d97ccb806f5d5055bbc9ca2d008c82fdec4be628686136368738a11e51fe. 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/AUVR11002486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78e66457519d43ea2c9da3e7919012d4953d0bd712dbbe9d8ac8d03188ce5a6. 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/AUVR11002487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b4a22520aed44e4abbb5755c41eb7cf1c47ce3c4b76e058c5b76b6f0b9ff1e. 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/AUVR11002488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ea8f57fc980b9981cac5e5e4cce6a29d1d7e2af42d5d0ca0e26953a0512d07. 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/AUVR11002489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868753b92e372368d81116ccf6a04fded99550d884a4c8a465d4dc17e09395d2. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/AUVR11002490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8648297a3610241994dbbc4e556a032a7791d606af3737c678800463e0a28bc5. 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/AUVR11002491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db7ad4f356eafc543463b92a8b5886bdc7a7eb1415db0bde197d22949816e82. 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/AUVR11002492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6caa2b8cf735060d04f931af86fbe54f021830d1db10f2c17d6ad597e4868e. 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/AUVR11002493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd394ff87f677976067b5b15898dfce3dc7c87bf073e01781aabe46889917b535. 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/AUVR11002494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4356f4d283e20b180bba65aacd0dff43f3bedaf579ae0aec11f6276c3351d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUFU00500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc50b6737275398a02530c30ef5df476a3a172073397a941d26d5789551540c0. 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/AUFU00500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e6a30ecaf439db1f38d8d412e110d915a8da25c0ec957583173df3288a18f5. 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/AUFU00500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ecf76d363bb918e2cb1fc913c09b6d4f86213efdd3bdb2e03b0d06f764a2c. 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/AUFU00500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7a4c33eec52c3e7c24e34dbcbbd109f1643cf53f2d862d8547bd4f3d5171c. 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/AUFU00500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf909fea3cccca37f00429eced1b5547567232eae9dce185d9c02b47c01ae1. 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/AUFU00500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc96991405b62ff71adabd573104ac6c998efdbecc9f17945c5bac003ba6c58. 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/AUFU00500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ba8ad92a736f5fec15e3d5aa4b073fde41876c38ac62d68d99fef473232a4. 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/AUFU00500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1312e216d74d39b77da36939f764101e342a5cf4bdebfcf3c0e5c364ee71d5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUFU00500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b488c22a97f012b143836550bcbd0f71830e9d6fcc650b29a348de54747cc0f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/AUFU00500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3dc0a78a89c9918df41be4a775028b44fd5910f84d44853b656d98496579e0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUFU00500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07fe494c4cea29b21ea86256ee3f3d3d2adf354a5897b4a32a4f2469c7c56f. 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/AUVR12103183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ffab20d57e265961599002a5f6a8c99387db2a09ec9c0cf17d15dd43d5b643. 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/AUVR12103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3110faf50e1a349f4707e60f0c121d7bba1c4463b016f785b475faf5c73da. 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/AUVR12103185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b091c0ce6198e45c16db20ed787307c0ea8cfac8000c485bbea2def2e3d1ff5. 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/AUVR12103186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90918d0583157083d5f34d681b34679cad11db0e1217f02961aec2993175236b. 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/AUVR12103187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af53e8389fe7565799854ab5821f85aadcf9c9fc4f172b9015d5e4fd2d5d4e7. 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/AULKH1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca50041bebbd5520b5f3f3f0823b72ca40cee0cc9da2de814e42c2e66feabc4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AULKH1800095.