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 0x5d712c6f4d907cedb0b27926a1a755a20d9f0b2f35632e575d5c1a6949a065ef. 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/120c3e2a-0b68-4974-8e6e-29082d9cadc1.json and https://artists.proofprofile.net/proofs/artist/120c3e2a-0b68-4974-8e6e-29082d9cadc1.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 0x0097b6e6e0cfb20eb11a7e4626a1ee30c612b306a378ab51cc465c72dc0e6a6b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM2PV1749123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1d2204ae63789716df28d3a79fc8be61cc2981e2a176a85c546704e46cda10. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2254303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f20ca3a77291956eff1cef144e46dd89d5f7877d82f996456196760ed478c23. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWZ2201131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef24a76c216dd31667ac327a4542adc9b36f26347205e1368eb1a0b07ec861. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBC2393532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8469240ca58f32ee1e4fc95151dce9b82652582a190cf1dd4276311aec0cc4ef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFN2308890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eba7d07a26855433dbd787915d576db95a87b01b5a48eb055f707e0c4a594b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2467944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c666208e1f333809dc5b99ed1daa6e7ad21398ffac03560ca596ae4bbbf2838. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWS2467953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03239096a6ce438b3ddb3512b189fd3fd1f230502cda358ca9a395967de1a6e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZES82508833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16dee3a6c2677510dd08242309800228de70ea5fbffbedaa23278197a9230df. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC2520084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec0a6af9887fd6759d90c73d34d25e3b368db62076713cdb6a334ca3c007951. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAU2532066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d8c3cc42712c68feb30ff956eb164fea149077c950ed614df4401a686f206. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFK2524385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8be687b3f9a078f49ee6d4b0aa2bb68e0a0744a9e7bd64b36778a5d41a227. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7R2575375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7763fe7f04e20e14c578f909f4a6eb255661ad5c8e1e90a56f7a32630bdcca65. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZZ7X2594896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98800df256591f54cae164e3929aa931497bf4b6ccd61484a6af7d2c9b5a1bc. 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/QT3F22562323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ebcb4dadb6060c2961c54df53db3bb2ad4bba91c9a429e33282fb5b3d2e91. 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/QZHN32390859.
Stacks on Stacks (feat. Tru G, Adje, Hef, Zoinx, Deyon & Kabalachi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb680ce80f1f2b4f3c627883704742b8d3e625b448cc946edbbfe2bbd3d1aa010. 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/TCACY1707823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31e1bdc8321f9e4f3ccefb8628597264490fbb5b0f48ea5d1df957c20a399f. 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/TCACY1707848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9cfca535c7514c75db46feedce6e2ae1fda3e0cc3ba4df3a56a1fc4748ee7b. 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/TCACY1707853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1640a918256b18c36679fcc53ba83e7e28d8be70b9844b13e4a904ce6a7b2ea. 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/TCACY1707861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396da8066ba0c64207d97463add8dd298ed7f19671f9f2425491f47f5e6afe5d. 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/TCACY1707879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048bb4cbe0c378aaab09e368d4c8856df52fa000b3a0f687aa12c2e83aafff54. 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/TCACY1707905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ef746afdca519d6cc7fa407faf25a35b369149a3826d7fb8108c4353918c0. 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/QZFYZ2040577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afedb66ac7df6d809f15e07426515deaede70373f2837a8c0bb116a3a82b172. 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/QZCE61816240.