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 0x8521722c2c5d98a8c1eb3edc37d87213fb68dc447195e3c9882b7cb313609bd5. 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/e9ac5596-9cb0-406c-a9c3-3d56f7ff6c7e.json and https://artists.proofprofile.net/proofs/artist/e9ac5596-9cb0-406c-a9c3-3d56f7ff6c7e.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 0x2697b66b2e9d22b236a6d220a7d8c5f0b8dac3bf2330b36d0b473006aec2189b. 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/COC016907978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95e2aec89fdda451c96a528dc56cc8ecea2a0466d1c0737bf352d796a1463c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/COC016907977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3d44b53d245c58f2b0d589e73d0711556dd2ace5867a5b65c49354bff1598. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COC016008061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade7332c981f1424ba8a95704745a0d0724cde27307a0f694dec75c19e8d3569. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:59Z), 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/COC016907979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf778b09c13673b284b6df3930b3700498ed865e710c80e75899298fe4437e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/COC016908238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a3ad9f51e2a48d5250ff0bd0cc7dd28e0b6a60231f89615299148a7fdf166c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/COC016908239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0423fb9ecbc7813d56b4b1c3b0c425788c1d1a1118e3c984841ed9cdbc37502. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/COC017008512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a148630add240048b8536e6b4713687f748438c684db98d134ad73e289bc7e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/COC017008511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0788d5e61e9e5be3690a2df334a635caeb684f9e8437eb4cccfa085e55b35. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:25Z), 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/COC017008631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ee5e3dfaeb74202051091e418db8be68e26ea05b6186f0e83f2fdfd5a41b4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COC017108892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e43f80c035dd6addbbe78746f5a5e132f5c6656f781a4def4575b659d32eb46. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/COC017108878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3bb41f292c6ca7f9f6ec9306fd6830feb356b8225e29541582eede810648f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/COC017209380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280249ebb34aa7637df04656cd272a092d38fe534b7dfccea0de511e7af629bc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:33Z), 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/COC017309685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c123fef192745ad4de7a2929866e963d755daebddde8107d54ca82cd6b572c8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/MXF367623143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac320cbbaf8ac8c53151bd491ab6854add5e8731b4596f0a20c25225b5ef3125. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF367623146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a785f11bddf03fa3ec7d21fc10c839a932d08cac3e4ab721ebe8d6c28b4621e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/MXF367623144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb77afd24e5841d0905d3a590e8a1f17fdb27b72cbc929a56d82a1c214b5dbc. 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/MXF367723694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba7343669b87553642e83319251faa8778b8c8ec3168d010e36962f21b7d0b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:40:01Z), 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/COF018900158.
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Sin Fronteras - Los Graduados Con Gustavo Quintero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4276e9f2497fa7f10b2f820c51ba1206b60c0057616687def4bd07b0498176. 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/GBLLT2349049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e59287e8c6ca74c0867c794a0f37e48fb96b5a6cbdf8abe4bd3200a9774c2ac. 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/QM6P41874572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570b3111c209e7b49e14eddbdd984aba5901f4b301154bf7bf584ea29e00905. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:22:54Z), 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/UYM121401429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e307a690f9808240e4b625cd100e9443df386d47c8294e17dc285fd3e17b61. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ESA011844866.
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