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 0x5a75b6ebaa01e08a84b43ca4a81a41b40849e0e39b1cc98c6aed15f0f7d450d0. 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/e68dafd3-f00b-4c66-9b29-fc2971d32fd1.json and https://artists.proofprofile.net/proofs/artist/e68dafd3-f00b-4c66-9b29-fc2971d32fd1.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 0x1bb15b95b057423b575d90da95ad9d3eb03ca161e3d2ab0604322762210f5c5f. 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/CAN132200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bdfd068ba744c61d813a7d08862d2fe9f157acc9629df786d51a4fe524dcdf. 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/QZRP52464617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0f68ed9089026c2a3d1275bb8cd02a247927e489a8706f48bd7d043cc2b6bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US38Y2412647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b9db895e874d6e1f802ec6dce2269f88fab9fe8dcf88fcd1d171da820f1f4e. 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/US38Y2410139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85bc2f4e4713ce398394d4621a9acc0e24ec8533b96e9e2c78b1f8d2e88f4ba. 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/US38Y2412648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d1703e09c341ee2aefca9c5fa4cdb9b3a8fe77153369e38df12f5141acfff3. 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/US38Y2412649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521de7cce9fb1d164a6e7acd0267c0d2cccead1da2aeecb71773b933d7612eff. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US38Y2409324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a72e4639b012b33053ee05c89d545639a799ecbc9a676472dadbd1a1e4197f. 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/US38Y2412650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9add1a0672a07ca87b788c7d82941c3dcc410c52e0752827d0e00ed83ab31b. 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/US38Y2412646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9734bbc9eb50f4d10c7735e2213e15a5d45de8a2052d60e820af4e640d6062f3. 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/US38Y2412652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba4bfb47b61d41328704b0bf4119030ddf2184c3094de19e88bf47cfd837db4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA52272903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09b1da56939bce1fbcdb8c1b47f2041815cd932789713b44877023a0e78d88. 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/QZDA52272905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3760ddd0fa86fc54e9ac2efd62a798be94f73ac8bdd16e5d1abd4007bc036b7e. 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/QZDA52272907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0397c2ee7dffb5a9c55b4e73090097fafdc33290f6abb5a88d3d90400ff065ba. 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/QZDA52272908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6919cbb1d8279be146b161609dc78d9eb59d05972e63595fd8ec0fed420b1411. 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/QZDA52272909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ff0545d60d7072391d51dbc0ac92c4586dd0f647bf603f65d14b8db9f1c2b. 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/US38Y2405332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf316016fde757598aad9de62583e99ef226e59bc550513d245f6c938387a9cf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CH6542215063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99054f6510f929fd345d3c3c570f5cfb85f2c14d21269f843e4b509789fb7cc0. 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/CH6542215060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a39d2c4750c98b37d74ed3707b12034fe7125af5a0613289ae2cc00632c2b9f. 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/CH6542215061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f05b48f72d2a685a1038b435a7227f953833f1189e2b7bd11df8c37aa1b3a27. 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/CH6542215062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80425b6e229a2524d4c9483513a93d501adfce4ca7d175126bd0ecb7a0fa57fe. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH6542215065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524381e1c149d224a9c586f0f7722b274394bc8931991c08c8136f20e5dd37e. 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/CH6542215056.
Alles Wat Ik Wil (feat. Josivnne & Delaysa Nachia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69764317a351213f05566787b12004fc993c816f6ddfcaf0d5c2e8c81672ce73. 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/US39N2301713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80c06f6047b20b59728ecb72ab77fb1c8df1692f83798d9936d19be809636e0. 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/US39N2301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ae3399a37021c6c748309ae7a3f158b3d8b599ceae947032ae4e89e37e26b. 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/US39N2301722.