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 0xb50c2321e0dc8715971f0f3c89da8c3fae93ba4f5e98f133fee8c6364dca1c6a. 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/81608af3-3c0b-4613-b82e-9d3bbd5c8502.json and https://artists.proofprofile.net/proofs/artist/81608af3-3c0b-4613-b82e-9d3bbd5c8502.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 0x2b9189cc6f566709c1e49c4b13dd381d41d87416bdfea786f45e5dc34057e0f4. 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/BRUSA0500888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1dce7f700a60e2143523fafbd304e382fa18b9f9a244798da61020339b3c7. 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/BRTMV0900293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57591af62612efef3112f0735bd62d32d88d601293d60d709dddb2a566078ca6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BRTMV0900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060f4f7bd2a9b5eeeb619e7e1f63f7a62d2b43ce9e0b2ece5fcffeab28cc1f14. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRTMV0900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae029be1d3253a11c5dbb47f30d84cbdd72eea1e2c49ab9208a54e4ba3354ef3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BRTMV0800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c78b841ce0c7d382f19b6f126f109809be8d4141bd475b30f26fac250fe9738. 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/BRTMV0800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ba750404c2883ef5d2db63bad9ef6ac3c102d731a0a9e8e5525b1f1637144. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/BRTMV0800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a32ab7d8859685fdc0de7fe1604c8abdea35d241d02ddf254950c00fb5fbb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRTMV0800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d601b162c081192bac7b91d3aa1ddaad8be08bb3b7029c40ce4231ce5891c67. 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/BRTMV0800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f46b0df258899f6977c6cf87d86e56d413e74377d99226c195406cf7cdbe2c. 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/BRTMV1600330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9325da42a0b13aeb890cbe67da588239d340757031647036ff9a5cd45d72e12. 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/BRUSA0700947.
32ª Califórnia da Canção Nativa do RS (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe064eafbd90aa69b49e9eb3a5a467b33ea2425b44c520033313932cd4d6a8ff3. 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/BRUSA0300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b8e812f766d2df8012edadee27f4a97e4828b8229a7dcd7eb8cf0a364d7136. 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/BRUSA0300724.
Um Canto em Milonga para o Meu Chão - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc646c106bd28fb92651533f7b1345396b269d1586621bdccd2a337435cbc5a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCMRX2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62390378bf2b43b8ff7beea3f8500b7b25b7b5152ed57c5543669c0b0c23dc99. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRTMV0800221.