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 0x4727766382e0727776eb7139678f2d9306805ca092eeea0008376c6986155e4f. 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/7868fbbf-64a9-47e5-8508-fb2b0c0313fa.json and https://artists.proofprofile.net/proofs/artist/7868fbbf-64a9-47e5-8508-fb2b0c0313fa.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 0x4fa787103f6cac43dd10701c50df838649b26532bb003e6433d37a8100a4eda2. 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/UYM121705736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f76c00b9242c9aeb09383970654305553d5167eefa022c1ca4ddbb16bd7bbe. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/UYM121705740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413a223d143c1f49cfea585fc1c8262b1ebded0371e3029689d757b6dde86c08. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UYM121705737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb717b015f52cb9cbdedbd34fb50f69a4a62ae8cfd2b8a16c26fb97215c0fd54f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UYM121705738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7d4b777fb723b60c2cf6ea7302d519f234986f5123626d4715274c5e39c94. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/UYM121705782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8601345b5e86d420d8397cb7f5977eb0ecadde3b6898e2bdec39e5cf7b8f1dd1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UYM121705783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416554dd8d5b62e270d6ba13d67de6cd401bfafb424ea17d99406d3189c0ab8d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UYM121903014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e4df15abf080b53f7f27331004ee1833c8863b6b5ebf4cd0dda2387a7b834e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UYM122002343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e28646c7009ad8916cde692db102ba925eddb5e52abb655903f361445a69f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UYM122003641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6684915b376feaed9098b25aa7d28d197f23fc7add91fa7706c3419621942bb6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/UYM122104424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099547baa90a90df58d9a498e21fe8c6a834ca6b8a4760cd5e2f6673dafd9923. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UYM122104425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d2739d22b682758f41a8172ddb60260c0eba231bd0267d18d69a90894e187e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UYM122104437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819b15b32cdb164409f21e235cc154b92a1955329299c4d04e467bfcec18f2ef. 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/UYM122103896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f27093792109f82c7c527034519a6b54879e50b0d88d29dc95d2d55e78438. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UYM123000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b854f542dad4a7655b72024b8b1f69792a40fc70cd5c250565c194040990aaa. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/UYM123000855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae34603e47d67850231fb01adb256f7067b426044d667563c43f116c3c7cc37. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UYM123002491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9193cac5f48cf2cde2cdfd58828b9b828cd448bbea78cb3ca087fcfef780e01. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/UYM122400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242c427865ef26ca5bca0149472ed38c23a604eecf1c557d4fb64bc4bfdae52b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UYM122400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed552eda6ce2ce6871788af8002e9ec7caf530c1e798553737b8562493c4c48e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UYM122400999.
Yo Tengo Un Ángel (Montevideo Music Sessions)
Yo Tengo Un Ángel - Montevideo Music Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78601eb0356b6457bbb8199f338b2d89b5b6b14c17adf0e3060578218977853f. 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/UYM122401807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a41da9f47406fa575150c30046be128fb274dbf139653d79f1a6c46b6f240a. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/UYM122401161.
El Peor De Todos (Montevideo Music Sessions)
El Peor De Todos - Montevideo Music Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb3c70eca1473d80efa5629eb66b81ca03bad955040a9a3547e1b25520f59e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UYM122401167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ed3f81d1a1dde3be3b226a7280972e774c1d4c4af778a839f49b57b36e84c. 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/UYM122500499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74eee65dd73e153e7f1fdadb97483bf7b920e97839e0ba477095fc93f438d20. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UYM122501770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72949541ad2ab1c9b09946f90a61ab8d77e54900fdd9dc76b173e76e52a395f. 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/UYM121902853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dcc7cbecc32a2cf49a8c1e2aaff6a28b1cb4fa11b75061483dd410604effdb. 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/UYM122002390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28c21ea046bd510c1eba7cf26bd4b33d90b265075738ce2dc3774d0ce51b842. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UYM121201763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa02ffd50ead9f50bcf251f97f358439dd841ea5d140af983788cb931d519a7. 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/UYM122401677.