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 0xba668cd3f6f7ed6147298fcce82815479e27f9c57c82cea858e00f8ca59c09db. 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/b2d4b64c-9e25-4b10-ad4b-1d5f706b739b.json and https://artists.proofprofile.net/proofs/artist/b2d4b64c-9e25-4b10-ad4b-1d5f706b739b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa96966b8b258fdb4a24940b4ff67d6088021e186f832e6aeb89353ad8993436b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/BRMAX1401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0527b464e310b80dd42c94255a33f3fa993fc13c374e21d69afa7db8a9cbd. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRMAX1401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceef3f1152717fc85a95a36f768ebd4f9889ef1becac00d43e40c979a92eaf4a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRMAX1401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6563771452d2c60c117ff5f83b1939be0e7d6bc8a75d5352f82d1108b74d27. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRMAX1401467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a028a5b9f37c2045bb2c9d525de45762bc88e83a970e6a55ed9f9e279bbd7b5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BRMAX1401469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa883d1c38fbd856c9836e1dafbbc0709d82ee94a242b8f99ae2cc416e70c7949. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRMAX1401472.
20 Super Sucessos: Almir Bezerra, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9db667aac2a855bc7a78ea7d06924f2864b94cb9ea5c1410e1e95ac53fbd65e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BRGRV0501122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92315d623520da6bbb7f8422d05785acfc7d2f2a48b484ebfb857577d6fb0494. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRGRV0501123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab554119c4a5ea848f2b0155e9057239bbc56804af824b3e9c78f0e1569963f7. 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/BRGRV0501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88c33f1b3a343599d28c98654574cb6bd2a55e0e17782b35c62179b0c359fc8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRGRV0501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e2edfcf30648bf9406d87ce395eb0e3867235d02150c96c20fc33e82c6908. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRGRV0501129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36db98e8ce9c7bbe2fefe5aa3af91f6ea84b856ce833163a87e396647774a87. 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/BRGRV0501131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc84cc1c33566967e6a7b098e12b3fb692d856b48aa80c197a2c8965f84ec25. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRGRV0501135.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fd8351d804e5d29c6c9e5063fc0fea80dffbf400bb99587fa371900177daa. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USANG2172588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc60739e4db10b11de9bb3258899b660a7fe2d511a2e79794c61846b6bcdd255. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZYFZ2507774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d3f12347a39ac010714b4cf76a9c3da247606e02a604d5e89cdc202f28bafa. 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/QZYFZ2507775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40559ad844da732a9b68a59e9f9ddc5381adcc1793f2c987d6b7cbeeedf460b7. 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/QZYFZ2507776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d627ad80f842596c6f443c121a68117bd4c48e6c0a8392b6983d850af4f2e7a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZYFZ2507777.