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 0xc5f5161d5bf33219411d70be17395199811df5178a823d3046c9e716d3407b5a. 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/1864022c-596e-451e-8b1c-daf69ac0979a.json and https://artists.proofprofile.net/proofs/artist/1864022c-596e-451e-8b1c-daf69ac0979a.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 0x4f0675aa1fe55ddacf80633cbd50c1f9d8cc2a8ada0f720c884796ae3ef85ea0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BC3PG2401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a8ee23dd6864f2fe4d0806eea39d515f151a941290d6f1e9e21c036eee49d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2396019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4b61823371bf89487ae7913e802290ad6cfca64f260c241c14a450307e59a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJX2464743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bd8dbcad72297cd377bac99141452f66f7cb1fc031da8df37c9983620a0ddc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJX2437306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac374e92c68d285c88bdb95b8f334c7780da12d93f767fc3f4672a912762f56a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZGLM2431444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845925219f3b41907f5a56a4f2ea20be2d05394378d1e13b3ec5faf1b1b05eb. 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/ESA112433665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8733958f4902ad60a3ac3d1c0db9a3d9a3a0f503fcfa6323698c0eeb09f0b95a. 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/BKF442400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1f726e8733b21b7466e6c96ad35c529abd9397af28af7a04f5c93c3d2ace3b. 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/BC3PG2402529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe620ace7d4a9fbe343943e3b524ac065738e7e46cb83bda9fa1c94ecb02fb116. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/BCM9B2401372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3969debeae18e6b514f008d733ac3b6802dbe2837c9aead0d7781c749e21e. 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/BC3PG2402313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983ad107bd886d6d05ab62b461c0d183c5eabad00559d2f43dc330a45b6f7dc. 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/BC3PG2400841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bffccc7f29ddf6c00ecca578e0dad1bd0dd165acf5b1d3e45d4d7d846af7b56. 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/BK4442400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccca3bf432b2887f06f8e77c5ad458b0ab8b5c928b32d67a27eeb39082232a7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BK4442300121.
Eu botando ela gemendo - Camisa da Marconex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03590a35835719e3711d4ab88f1fcc8cd3620e37b1a96311e8e623eb0b01938a. 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/BXKG22300625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd610079eca3b4d1b227264077681ef13bad0c9e2744156f042a0b8bff31ad3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXZKH2200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bcc21d9aa81b2865076b71f2cd6697f4f31c80c14c7ab2d3cedd588aa6ed2a. 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/QZGLM2503445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ffb447e0a67b13b19a0ecd1440f4339bb702b5036d774b145f72fa1c3bfded. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GXBAV2590135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de28eefe94c6e0e0d7c4476b941ffa16aaf26a6d1d936dd985b89644920bc7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GXBAV2541567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0bb3d2e7b68e03a6f752f92e0ea1a14c2a69a71f04dd39d9711033d1de8197. 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/BKF442400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1ed65cd7ac641e7dcc1e28de733c3caaa3ab6fa4dd631d7db28c0cc9a0bd7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKF442400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbdab310fae5897794b318d06a807548b8965e2f5f0f7a83c0d6054d8b562f3. 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/QZW9L2411296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685b281551cbddb30d176006ac2581acfcc86e58a39c4a8062aa34b5e000e5ae. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/BKF442400281.
Brota no Barraco & Ja Veio Tirando a Calcinha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21ae64cb0f601708de4eca1d018370641b0fe601a603254d7efd51f820a3d8. 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/GXD7G2276824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8959e4251c74e1193be8cbf57ff39f5b425079639722f084a2b3eef85c3b5bd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZTVM2440444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db61b3517fd8c5dd69757f7d258489cd8e8e0caa3cba60470168359c9c8152. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/US7VG2597474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a235a3d790509b88a0594555ac5feacee123fca6d246484e4f9759e3f365ba. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTVM2442058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0985d36168604a9e3948fd7fba4739c042e8194c00dc3ac31aba0e8a5abfb4. 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/QZNJX2458984.