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 0x48f94237c3b63844597daef8786f4f0c873613c012aae5a0b54d94f89892ab81. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1da9c64-fc50-498e-9271-c919b74d43ab.json and https://artists.proofprofile.net/proofs/artist/c1da9c64-fc50-498e-9271-c919b74d43ab.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 0x218c8acab3cd09fd270654fa6a8fc125a44fa8e392e47f58bbd04c67161c1b3c. 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/BRYCR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80894a00acf9ddbbfa89eb270f7afeea6e120dbd789dc90d6243b75f340f51f7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRYCR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1677301ff40dfa5743ff76008e9f9ef7018214017a2db0e57073ab26439c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRYCR2300003.
Sinto Muito Que Não Sinta Nada no Fim (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88f165fc781fcf3bc888d64806d35e231cc58a40ac2a91cefc87f868987202. 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/BRYCR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c485cd3b3827254c412ca9e4007c63ec49cd5a88f06b6bc647f9f9edb8b2a09. 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/BRYCR2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4721324affe6ad01889a82cbd59167f56beb1ea4ef5b83653fe30151ac9f75d1. 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/BRYCR2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75cabb3e985e5b1004cb71dbea373c179bccf809055dcb959aece4ea7b48bb3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRYCR2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dca46cb597786311d9273ddb48ac505f1a085562626bb802fdc10979e79129. 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/BRYCR2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dca46cb597786311d9273ddb48ac505f1a085562626bb802fdc10979e79129. 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/BRYCR2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6e946b8b954c8485de2d0557b83904f3c07cfcac1239bf35756f783cd47a2. 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/BRYCR1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea0796ff32553f42e0411d03be687f01e23d9dc58c347987935cd0c2fc57e5. 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/BRYCR1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f21f1600fa8e6648cb1e90e6f0d388ac7e6f97147f7e284406d86516099fba0. 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/BRYCR1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac98beb53ca7ffda507e720f90e30ab90d036857b504901d23f9c43c4762df7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRYCR1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea0796ff32553f42e0411d03be687f01e23d9dc58c347987935cd0c2fc57e5. 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/BRYCR1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6e946b8b954c8485de2d0557b83904f3c07cfcac1239bf35756f783cd47a2. 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/BRYCR1900001.