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 0xfe01ddd11eeaf89695eff8f91bb3bb7569d5500973bc017c7908926f81ce1309. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38152f81-355b-4b41-8f18-916a73476832.json and https://artists.proofprofile.net/proofs/artist/38152f81-355b-4b41-8f18-916a73476832.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 0xc3eede78f0dbcaf950f5c93c93a273c3fc2ce80473d3843d798ad4209a88c58c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ES71G1871561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf6fc6785612fddb81822f4e4a733cc0cb73f55532b36ed13e0b9beae94bab. 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/ES71G1871564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0a8762b5c54e17e7629dd2a97338423cc5dcee8212693a9158476668c885f6. 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/ES71G2056009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f478b70dfcc9c3be1aeee6706238c1152e6702ec0c980ef460e7ad64e8b0fa. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/PT2DY2200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8cbd3ea6d78e2fe109a6eb4a9ff7885986497753f9320cfd26b7b5c5d0152c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/PT2DY2200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4acfcfdc52a4302d83d0a4a6cc22180cfdbe5b973565067c151ad007d96c02. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/PT2DY2100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f381cb0da5e09b44d9353797cfd01bc2efda0d4737190153aa8156e033416e5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/PT2DY2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ad4897fa9dd891ae28243162aa1455a25f2d038faea63a0f8a2bed5cc6c75. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PT2DY2300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694b8766f3838af0312d1eeccd0e43aa09f5b2b57194239a45c4998e4843eaa6. 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/PT2DY2400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6237403c50747ca189231a0be158ba3235c7145e3d088c338a871091f16f5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/PT2DY2400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9ccca144c358498d1def35a41c0ecbecd340fe9d705ecbeb1e1017a5bf07c0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PT2DY2400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4cd31b83901daf75e44334c276cf3219d2e980a497134d7a071de9805d5446. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/PT2DY2400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb76d20278ef33d29bb07e13ba8ec8b295f30ab2b43768911f0259e4b9cad6b1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PT2DY2400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a1eecb47d9af2a255763e8f4226bbb7d0d5c5e1d630c99f5f8efa5fccc145. 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/PT2DY2400619.
Antes Que O Ano Acabe - Birthday Pack (Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39af9937274e0a6e151a4df9d620eedc42efdd472e3c8cd96ffabd62ec904688. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT2DY2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc011296b10956f7cc633727228fd9cf554d84d03e11da211ec49da8660636040. 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/PT2DY2500005.