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 0x797d79bdea94f78eb3310578c5663eeaf51dfb4170149cc6c54d702192db9de0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc70254-d0bc-4a42-be70-a0acec568420.json and https://artists.proofprofile.net/proofs/artist/9bc70254-d0bc-4a42-be70-a0acec568420.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 0x2a2a4f5645739f642c3cf66de532ae85a847f40040ce37119328bcaad585e533. 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/USHM81981193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0b4b7b56dc23e9a08e18a26298d5901bac1df0a4dae6334b44d8249e8ad035. 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/USHM81981195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e874a982daa2736eb101409cd74a58a2674c5b88b1ac578f82c9ca31f0dfb57. 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/USHM21831285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c0124130f0f3e4c3e44334069cfbf3965db8d5f8075bec8d6765d59ab54ae. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM81981192.
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 0xce58d952a71f8417b972874376dfc874e35d8bec45f34f5277af2a2b6836d456. 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/USHM81981196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257326ef77a8a0c38f8be5145b9e16e0400ac437e0832cafaeb0d5f6ccacfb1. 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/USHM81981197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4232d420c5eb150e980dae8cb199c5789c52b0dd0af5febde5658893e1d0d544. 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/QZTV32205311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461c37d4fa5ff967ec0c8a931bfea414375357e9129df7ca1242ce3dd0006ae. 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/QMGR32099186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7ac4e2841494cd61d7d44fc22a8111e4741570a835d7bcdee40331995bf749. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMGR32099184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc09d9184e3500db4ade6b814040420c9daa3f22f6e01240b359c2173e03bd4. 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/QZWV32441638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9747d6fd8efe6504e0f2129a5a2e8a96df459c537e7b6a112722b1820e475930. 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/QZNJZ2415731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218aaf045dde3fae1fa8954399ec0d0278add3fa27b00abf904ed353bc930566. 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/QZNJZ2376826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51261c0f436a6b85a447fdb06220ec2e186c688bc4f173f0c5353d805930f38. 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/QZWDD2253697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970b8a508ba112d2979b58b55826be06c29cf607d5dc99e078dca7d6cd17216d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2143134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b2519ffd9ec0520a77ccefd13abb854147ffdba74094db30511806ab92d2a4. 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/QZQAY2128880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c951d3c7b548d697a9cd5118a3bcce66f098e1f98cfc0fa3cc3e94a46568edf. 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/QMGR32205998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1f975353f5ff8d8294474a51a65c6883fa83e2d97f2f7c3be2709a5f20ac8e. 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/QMGR32072600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d29dc8a0c6e48fc007172f2c6c899ba60f7ee9ab52d80f00a0cd4f1b6765a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21816249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364ac33893d8ec1412b8410acdfbadd6fab68770a6be9c7384fd396e219eb61b. 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/GBWUL2316733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf137aa24a95163c026577727bc54c8cb44ec78986fbd2a7f8c514780c4693300. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBWUL2316748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa29ab6bb96e93073cdbdfcf4b3b5c6c6607aa82f9ee381cfd751801d5313a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBWUL2307738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04521199d6bb70d16d95d317491b9f60776e8c4195e37402e624f43b43b90c73. 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/QZ5FN2313631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba08907467ed6b5bd63ebf3cd0ea065aa19bb75aa3f399c59375667e578eac4e. 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/GBWUL2316861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f6393ab5a4b1493fd6cb07685bef6374e042d2a3c03d6f484a1429fa8e72ea. 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/QZ5FN2200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fff604821a7c3ab7bf17003b6e5ea5bf813e6351c5955328edd460331d826cf. 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/GBWUL2231661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe669968aa93095c4febb724cdac2357acff574f3ac0f9f1dc91a39a6d3623ce. 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/QZGLM2497580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87517c269254ddc319c632d44aee28c477bb9f06650ed0288cf3c62fbefc66f0. 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/QZK6M2051456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b63f1fa68305b23ddd8b2107b560eccce961079ed5ed327ac2c55caefade88a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBWUL2149249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be35dca05fa74faf1de5c1b031856e19cd2285622a295f04ae5ce3a17d08b47. 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/QZMZ92484093.