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 0xc021ccf1d69007eb637a34486647f633ab0636abc640365e9d246d48c95f616c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/528a8b68-1ce6-456a-9b38-7005bbedc6fb.json and https://artists.proofprofile.net/proofs/artist/528a8b68-1ce6-456a-9b38-7005bbedc6fb.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 0xdde803f50dc3c4ddde2f06878bf802a662513a1ae27cbf5675d3d5035541edeb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRN5D0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea5368ab34dbcba14e1df917f794df59d2108309997620c55880dc4b572226. 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/BRN5D0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa92dc2f38dc5dde840dc303b861269cb81fb25169b02f59dca510202d529d8. 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/BRLRE0700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a39f1f2ebbfd1c870bd995928298628b6e9ebfbffc99583c914fdbaa56fa52. 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/BRLRE0700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d70643355b441d33e01fd4a7741ba1fd4bba9dc55f25e539759974166b7dc0f. 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/BRLRE0700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec09093cd7fffcb3fca3d0a5a78e7988d3aa992ae09697fd6c3feadd64f4acec. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRLRE0700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63915317f168dfbb09cdc2b7d2d46fe85a101a9759a0cb727d1134fee292fef. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BRLRE2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ebec24fd3b83c59f99ffd913f9776774baf4854a5aebd3b32f055410f7fce6. 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/AUMEV2476133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b423e0d9f7b797c63375f72fa6b79ea044124cc54181b8b6f8a086e7d7898. 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/BRLRE0100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c65f40f546523c7c0dbb72a3bb236cde11839feb6c4c6081c4a8d817065b9a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRBJC2400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5011a461a60356c2d67e804a37759bdb909179045167975c351d29fd9dbfca. 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/BRLRE2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae24bdd20bc1488327c952a8d9b42a4defe143b05dda078662fac3c38e3f6e. 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/BRLRE2400016.
Minha City (feat. Duda do Borel e Gilklan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee512add6ca2039f7e51e23b5b43fec263c2ab2d10c36fd1273500579284680f. 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/BRWMB2100935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5fed85603fb5f7c75f53a1af83be177db1b325d6ac5a348dee3fb3079b32d0. 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/BX2Y72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368e34bb5ae6cee8501cd90a04948aa101267ba7eff72d972ae80edbf5d528e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRQ4H2000012.