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 0xbf7623011045964d1c1e815a221e4f949280f2aefbcb2e9bcc00dd21aee87ec1. 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/f37f2159-5910-4238-9a3a-b346d69e9a4b.json and https://artists.proofprofile.net/proofs/artist/f37f2159-5910-4238-9a3a-b346d69e9a4b.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 0x51e6d956c74382b0fe9305ff0393657c0cf0360d666a1a5afcaa9208513c6fbc. 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/MXF140000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca638ff27dc1488e03c5b8a133d4f40e3cf7129092b5f24cbe4db306e6c86846. 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/MXF140000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf65849f02e70ba88de35820f8f9108e5d74032f57081c4f55fd099c2d88a528. 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/MXF140000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eda376fd739c377b0bc79c79fa633926b94d36fd6a7e1c161bf28947cb4401. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/MXF140000350.
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 0x0bbc9330e1dbcf3e32539b11f6aef05405df41c3facd5e4635eaf8ca58a728a5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MXF140000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdefe32ef82b356c87dd9c05bff7e21489d65d702d5e46594dd093d333239df. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/MXF140000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea6546055bea1d6418cebf031aa540484d35d9c32ad53bb1ce41744eb5cd5bc. 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/MXF140000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26adf8e87a88699aa4c6531be0ebc732ec0469a3c71751bf93213a498cc4ddfa. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MXF140000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13ed52fdc5bc8b88bb4158cce0f822ea85793f4633367f0eb465f8b23676dcd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/MXF140000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7f22e2e37ca79fb68f4049c85735dd36db739d1b396a07e4794ea6ff91cb3b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/MXF140000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3161ed986852d2ed86e8a881ac668d3bedab24fefe2f6b06b9bd02b956d76fc1. 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/MXF331201065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed36f45202b8e4d5c19abb9972abb5f69c62afc0d571d901cdbcdb70e759d0f0. 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/MXF331201066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755079f4df3492110baa2aecfdbd8f5c51f58c301553b6eb7160e7845b67c21f. 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/MXF331201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd489d179ebc3855cbf8addddc03578d57032e14c21b0cc07dcf42abbbe2677f2. 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/MXF331201068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d365d502304815d226f653abfcf166f97431cfa2e838641b0743e45a51233dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF331201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3bd8de881d713936d6a10e1ae16c2a73a2a959146082febc1942753b644c74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF331201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb4446315c4458d2dcc0bf2e30b01f0ec00335ce5e2684da29d47693943a2b. 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/MXF331201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d0a8ac8b1688943f40274e67066c0894b1cdf370614f5e1f99a346042d09db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF331201072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa03a7d0b5d56ba10cf6a2ab4f8b0ecdde771632ea363f544d8a4b73c2010604. 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/MXF331201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfcae53902b73202d24cad54c14715e55455227102833df80798e5013534519. 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/MXF331201074.
Homenaje A Julio Iglesias (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e76f45a83d09551852c7550408d7bf4540401eb3d9d5b8979e75bae6085ed7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF331201355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d6d8f7c709d0d07ff693d72f5b917dbd5d633e98ee88deb1fc81d2e16b931. 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/MXF331201356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5dca7bb0cbc543aac701ce89a9982e000fc51c8f43cfdd8a5200e7988e92d. 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/MXF331201357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cb50252206e9cc8c60f1d49feea23f91b1ecb08c33762c201add9195c86f97. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:16:50Z), 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/MXF331201358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d80d9bf0ff03e0d7ee33ffdabeaa1464b64e5b3d989a846000d40b201e9da7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/MXF331201359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6853a3d2fb424b1d4870ed4e5c5704b80fcc0e8edf0106aa37399033f1812. 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/MXF331201360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c0d4f982620aeeb475419ff703809d1fa9906a648b7793b1eaccff75b83396. 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/MXF331201362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf207eba2f7896f9d94c13a648886ee1e2d4487fb0f4b3cfb318ef4a5ef6794. 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/MXF331201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14ecc8fb22562ec9a7fde073ce8afe9175d2e4a487479644b0d6da9bd3a28c6. 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/MXF331201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dffbb0017f19180f3961fe4b43e834089f15b133ceef56b1ca0b3844b36769e. 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/MXF331201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea8e8535da6ce0af67c9924c44ddc0bf0b04d20ab561b1811b5b9ded7bc9d7. 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/MXF331201361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781145abcfa456986d68c69001919ff71b91253b77ebc48d40e109708dd7c4da. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/MXF331201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baacd3ae5753d126bc6693ad7cb10e9ef082a9d5fe9f20982439855a1b84923. 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/USMU40400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e796218df33c8c21517f08f1c7dc22de9b42816425f90223382db9cf39c5d. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USMU40400126.