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 0x5c0f1b60f99204a0cd945b8a5efe6675ee28c2caebf4f3aac9356550105860f7. 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/2eab0542-82a6-44ce-9540-875daffe90e9.json and https://artists.proofprofile.net/proofs/artist/2eab0542-82a6-44ce-9540-875daffe90e9.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 0xdb68fb0cb20b6cd8d8acc256b8195a19eb9dc4840a19e12d95e5ff88a6889fd5. 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/BRSKY0501053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe092ce06058faff7c43240906561371f97e1c751a4aaa1f8d5b525add9e5fc22. 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/BRSKY0501059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253bcaa07c6518ef4c7b159fc5b41f603f3ee5a32a17095b82f8ba0cfc44eb0a. 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/BRSKY0501063.
Raízes Do Sertão, Vol. 3: Cancioneiro Eterno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a64e94fa1e5fd65e35716d55c7e2f48fc34950a4e0f0a2bf47d8edfb8c874. 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/BRMVP0300205.
Mais de Meio Século da Música Sertaneja, Vol2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7cac35de4d61dca65a4776830d20dfcde75ffe3d303cbcdea6489d494890f. 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/BRLSR0300222.
Sertanejos e Sertanejas: Série Campeões Sertanejos Dose Dupla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8ff1a9bf770e923f6cf73737b7e9da5b4dc7f26aa9d8516e598374884790b. 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/BRRBM2001087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eb7acde1848b83c601087f19cb38afd395072a96b6f8f6501e5b71ed9c9506. 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/BRMVP0302436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbab39cda8b65e3879cebabf9224390d82d09249dc60f19387de755757c2734. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRMVP0302438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e403f97a014676fabb610eef0c04e1b048e8e5351758fbf02531c2997c85c8. 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/BRMVP0302439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e180868314203503d6e1c2d2def62176ed303a5aa79048e77beb6127edb034. 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/BRMVP0302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe0141de2f6614fb5c199f5e25de886e1695e3b542ec164230c26f8d0e3963. 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/BRMVP0302442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fb82f06f8fdb82f4fe8809836f99b2bbb5cb885b83e650ab895cfcf8bc1825. 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/BRMVP0302443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12904fb425f105a009e3c77861acff416822db9db51b477ce5f71b4dd2bffb59. 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/BRMVP0302444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea06861419a0ca03a032236348668de69cbb59f19bdb6eb126cdc7e9ae9c786. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRMVP0302447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8593456d42108d020ffab349017cdcc4268acc0d77c4bfeebc47293456bedcf4. 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/BRMVP0302448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d42e27b4ff4eb57d2e0dacfe386f7218bc2ac20b8f1b3b33baa4673b566c78. 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/BRMVP0302449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6dd34794973bbacc3d293d9f2bf583d302154cc11d708f54ddf24048291878. 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/BRMVP0302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50190b3b3bef304815d2a8226cdbbebd5ccf40df8c62a8bea3b90bdd3d0ffd7d. 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/BRMVP0302451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8889f869aa53a7e79c5ebaa26e8944b69baf42e87f76b1be8cc2fecc96c8f. 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/BRMVP0302452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561c2f77f88c9fb147ee325f5325692eda2c6b09d9af1bea4dc661e91b7f6b3a. 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/BR19C1303835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe0184353b23c1e25d28d5d54d74b84b90ba41e20e3c2639b5b8715d39e30d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BR19C1303842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b3ffef35fdcddf209b3eec5a496682607fa3c0dbf7bccdddcbd3049c0e4e8. 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/BR19C1303846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc6bfe252c759bf5b031ce616f5f1b6435384a91d3ba08a9ae3d8bf0c641eb8. 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/BR19C1303850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2786a6e750f54e9893e5f1b6a44d1c7f33d9e0cd6b7563a0392c0fc01c68a324. 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/BR19C1303851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7777a7dee7008b44bd0f7062900575b5dd491586e404dec3c022b1a834ac82. 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/BR19C1308254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad95a093335c4c952f8075ef3bf471c4be22f7dc9188c827f4fbed9b7e0b01e. 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/BR19C1308255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d89502520b9f46b702caa125eb0ff0c700b1b3768620389909e6f675da164. 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/BR19C1308257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb934fdb6c03b5efd26026a2575d2374955d41a1f5ac368597c11ea511d8da29f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BR19C1308261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcbaca6014abd9c2811ec32fd0295377a1ec3468da0c58e548b2c1f3cab0296. 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/BR19C1308267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d536edc3b385b4a0df8fe8e8e32f555c2b404281b8ac25866529287c3933cd. 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/BRSKY0501036.