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 0x3c16283bd680768b24bfdc287ba8e9b9404099e42a01236bebb91ec741d5d586. 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/28f1ca64-7c20-4aa7-a0f5-fab96c1f94f2.json and https://artists.proofprofile.net/proofs/artist/28f1ca64-7c20-4aa7-a0f5-fab96c1f94f2.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 0x958faa173cd1df0f0a2e83ae2e89b749527300ee461c81c86120186efa052cdd. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/BRWMB9803173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef0b7cc07160393504db7d84d05dc40dda6de8207fbbab7a64674d12b05dbff. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/BRWMB9803175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e231d524d82778ec3129907dca2e5beea4df27667ae4478554acbd2a3c0a23. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRWMB9803178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03fadc800c66e564175249798a8d8002e7c3f034b57edb0a54749bc8ed3ead9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BRWMB9803179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb314d69e30aa1ba1715900e0abc8b223948335969d0f2f1c7dc3d443b70a7b4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BRWMB9803180.
O acordar do sernatejo (Os brindões de ouro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd283e4125a6129a42a1465a261b1e0fc385aee022b2d4a71247bd4f7d8846a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB9803164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5ca6d74ad93dea095c9a913f4798ebf2b15e60f5bd0157cc6354fde07fa696. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRWMB9803165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a65d8c0c446c229169392c5dd7cf6178c85d0eb7264ba608b3882c69d8d9004. 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/BRWMB9803166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8056968b53b51c07d9fdfd5d12399c847ec29721f679f228273f9065ae0597ee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRWMB9803167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8652afa1a8f72e2399b6b1b575417a6720f7fbabde551e55549af5e7943368. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRWMB9803168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514d36282837ead34921d61b33c4bfcee555948c77702dcb8b6936eb06b03c2f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRWMB9803169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473591a3a98e221e704a55e243384a69410f0273db2323e4f8ec9b04191b5d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRWMB9803170.
Isto É Festa De Vaqueiro (Aboios e Toadas) Os Bridões de Ouro
Os Bridões de Ouro (Os Reis das Emoções)
Vamos A Vaquejada, 1980 (Os Bridões de Ouro), Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03fadc800c66e564175249798a8d8002e7c3f034b57edb0a54749bc8ed3ead9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRWMB9803179.