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 0xe5347430409d93b96e857b52976c8a465bcc9dfcb7431a9531d85b940cfaf87d. 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/81009162-9584-4dbd-b4b7-38260e24e4ed.json and https://artists.proofprofile.net/proofs/artist/81009162-9584-4dbd-b4b7-38260e24e4ed.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 0xf65320c56ae6d0da643a96d368d1bf7a77c466f626798899df6bad2a7dbf95e1. 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/QZWFM2409435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658ff9117bd130be224fbe6af98a9b6751d4cf32c23f9749cb0a8a9b9589bcd2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZWFM2409436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fe1157f7411f184a77c76f208411f767f37822121e5ccb3392049315c98b42. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZWFM2409437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb675cbebe8fc7578f27f1ec23f571944520df63992021d05cf5b1784e8960c7d. 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/QZDFP2149088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0649f08f38c302658eabbd08733ece8b63017580b1585ddf69ae39dd93524c21. 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/QZTB92463250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3970ce60f9efe35a70c995df6626f826df73b5db723a725c5423b8f0c11994c1. 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/QZTB52440022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589ed95ed9f77496f755ed0b6987bbeecf95781fa1fdbd5ebad3c34b87d2042d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAS2421498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aaf0abe75c734dc797ba5327e030bdb718a90844884734412b17264b9bdacc. 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/QZTAS2421499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06f63e835cf9d1cf6602eacbda675f7491fe2cb03570b23b2312a8d397f6f9. 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/QZNWT2466505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f899ea833d5111d0cdece2e1290914e9409e0f43f85a0c332da036bb374951. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZMEP2436928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c252de9d04d6c530a80bb0e6f1bff4d49ab9bf8b14fa1eeb665c23934f419a. 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/QZDFP2125432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b64827d1d0bd21dc230053529aa82bcdbe3c00e6ad25343cf0fcc5e12bb9e3. 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/QZDFP2118931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1522c209124f6b9824b9338d55cc7c6bc158788f974042bc6afac5b90d4b46e7. 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/QZDFP2110282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e3b51ef28e84569241e50391f4ce61e313114b707f68e768116de4db2c943. 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/QZDFP2101258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1d2ec8a4ae07dabafa4c14297e5ae53da725baa355315f1b4be2130e748a77. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZDFP2096720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec715dd574f51e64a9c769e6db24ea90da3b9f912c360d5327e385a3d6bc0e4. 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/QZDFP2098021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ea1115ca59f3789e72d5ce60748aa2c41980c75a9304c75869eee8967f0008. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDFP2091122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4a0a222cf56c5d9075b6cc2b36a78a972a80c5fb45129f5349200aedf5baa. 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/QZDFP2092933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab188224da29a708b9eecfe724147eb3f72db3457876cf47257f188c5d2f59c7. 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/QZDFP2084786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728e017f59e7b31d24303641b32afe52b19ff7ddfb4fbdf222dd02d1e9f9bc4. 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/QZDFP2083528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cd2268460895a896792c89fb6980fb046df30dee06a3a71068a38a8b39f8e4. 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/QZDFP2060588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc201a83f9bf1e6c2365674aa5f368015a406f20755e4e4bc645d7f8d15d4f1c4. 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/QZDFP2056290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82764d416b0921ed2cfaca743260cd2969c96960f880c4bdc02463cab67d4c7. 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/TCAID2492109.