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 0xb4f74d217ab819a53ba40078e68edf798df6d807d9eda8ac65c84a626f3025f3. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2657ab73-58e3-4a5c-a4b6-aa65e4ff6a7a.json and https://artists.proofprofile.net/proofs/artist/2657ab73-58e3-4a5c-a4b6-aa65e4ff6a7a.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 0xaa9e30ed18ab2c32707c88992dcb65ed0a78bc224b17bf13ef7419dc3748b01b. 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/BR0066851955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d25dd2d8572004bcadc5057b4e31e85c39f94be81269a5e4041a57ac5690bde. 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/BR0066851971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ef7c5e2a140e596641c5f0cd9565e2f30952052f81c3f4d2eb1e52c1c0a368. 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/BR0066851980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba2b3d5888ce011e7efcec2542450b827275abcb252774bcc7f4152679a76c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRCMP1600700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87afd0ca83104a584fa49d375743a5283c6adf3f93a87a95a1abd2a34f1fefea. 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/BRIGW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee99633043b01e79848e44db8b5de1f89d9ba7c8d056734815da439f292920b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRVLS9700638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eadf7e3a7225a9295ab77b3e6e000d31c7602344c7c0d754efdaebea4ef429. 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/BRVLS9700639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ac4259c7ce2545fa28a29660e52d50fd567b916e5fc94d5dabf43f2026f13c. 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/BRVLS9700640.
Céu Com Pé No Chão (feat. Celso Pixinga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20204da0a1ce37b87ac690d633df741a886868d3a310b82f4f6dc14b89c3f676. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BRVLS9700641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b2143b7079d942ab3389d56b67a519403f422f062cc6e4ff3124cc2546916. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BRVLS9700642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e0c791fcb5d25c222bcf999ea36b557d736f2eb17a4789acbdc4c37b26b27. 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/BRVLS9700643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6312db407a7321fd4d9985a8450be7268c09584341db10c386f62c7de048f63a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BRVLS9700644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1818d54850244cc48cf29bc85aca9bc432105b1fa36975cf2c0202a829d658. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRVLS9700645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a859de506973bc9b10dcf6136f593896eb6d369a68e97792b8f6d16126b6bbf. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BRVLS9700646.
Eu Só Quero um Xodó (feat. Paulinho Moska)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5651ed52e9151999be183f7e57c6e20a0d018f3437517a3b3b16b270d7cbc411. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRVLS9700647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920427df07cc6fdcbc462f08a6024feccbee185704ae3c96b2feb3155cf37783. 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/BRVLS9700648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90292bcc352b9598c81306d7d81c6b6c8c45fe69be839185a8fe5090afd29802. 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/BRVLS9700649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94bde93357bec046ba608e1471d1df8bf55fcd81c5c303e9d74a2e39c01ce05. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRVLS9700650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb49e12176bad1cce2d28da69a15951ca718bbbdea06a3350321bbca49d3a47a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZGLM2507789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d295b3a30fae37329879afd7d039436825491f4aa4f65d56a101406d185083. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLM2507791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf85a8384cd4ccf688bed5a105fbfaabe1a9f0e9412f458cc1bcc103d20a55. 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/QZGLM2507783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c18d0fed1ca0b52c03f550ddb7ed093403a3a89c855a2eda198d2e2f108f9b4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZGLM2507784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc2004c041a23aa51d3d1013a071de72af4fa3f8564f8ce2fd6a9eceea5a676. 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/QZGLM2507785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47cab5737ed8b41fcb676e43b4ea1654f6aff7fa4ea48802df2a11e803ca5e. 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/QZGLM2507790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a8dc3879017db3eb0e740470c2b66319ba674ccfc10738d41ac6bc811c3051. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZGLM2507786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c7f55340804d3aa3cdafff792f1975bf035133d3960e661128b7b4e8cae26. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZGLM2507787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6d772d3b2c1d561a4762d764bfb70b61070a1cfddc0da033f50cde7c0e614. 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/QZGLM2507788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274efad2e13e9ad0fe5a2970347482178d1f29a63d614a0cf6bcfd8de8d15388. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRIGW2400009.