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 0x07f7bc7d7cf6f06b5ef558e65a7a161cb21cc8bd8239df2fa0392de4dd82b6ff. 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/87c739da-5893-48c0-ab3e-736fbce0716e.json and https://artists.proofprofile.net/proofs/artist/87c739da-5893-48c0-ab3e-736fbce0716e.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 0x87fd0fadd9a0537d2c53535d3bce288de94c7a55b0c007d461b1f9eec8dc51c1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/AUBEC2300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bd2a561aef3278a824fe047fbf5e0168b9cfcf1f8c30397759cf12946cc70. 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/AUBEC2300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc2e7394efa12f8a0106f52710b9ca3aaefc8c2ce9319481039b44ffb5f729. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/AUBEC2300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d8c8d886bb573e3e3170d37ab753f6ee3dff00766766e5d8a78befafa61c12. 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/AUBEC2300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccec684e436e2750704c8de75bfcdc1b023a921569af8ff5b0a1ac09fc993f3. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/AUBEC2300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77601233f1383e8098335a17b72b5ed41cdf6869fd67078abb47174bdcd01d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/AUBEC2300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d750d7836784c1b5816f5678416cb3710deb94f974b373f11eb3e0b93ecadbb. 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/AUBEC2300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cebc24f86eb71718aa2b3a70d8347a780b1984d6fee442b58d3ea5ad4f4bba. 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/AUBEC2300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1082d535b43b55126bf395b87c1a2a462c925e7cd1fdd2561d473dfac5232. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/AUBEC2300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60a94b1967404407d0bb51901ce094052d982d863c338d7d61acb03999f0d3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AUBEC2307313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a1cc0e91822f291c98e245e27fee89dad3056d47ae8a5eb9dcd60c5acd36a3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AUBEC2307315.
Lá onde eu moro (Txai Daniel Cavalcante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5829eb805bab21dc24085ffa0e726299e21ced443b006db1ae75c187a2ac8e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUBEC2307316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530afbc6b35efa621dacf943fa9f01d800d24c4ecfe9aa4fd50cf740caf80861. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/AUBEC2307318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44c4bc2b9539c97d0fad8f244bb823ee5da3d072b132e01d70d498495215141. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUBEC2307320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a81c59a74576530cbde6a36b79e6d3108df3bbdb44c84ba8448a419b513cf95. 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/AUBEC2307321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cef5bcb9630e677a2d90d0d820e918b450ea8050843d118280a4fe32a37a02. 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/AUBEC2323861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b07d2f3a8f22664b3f0563ce494e6735ecc3c75eaaa732ed736ca77941319a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/AUBEC2340164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa710bbb99132cc6f2f216acc8b1e3085aa37e21ba84714a42bb8a23279378cdf. 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/AUBEC2340165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed2dd7fa1fbc3592efe9b09cb4b814c62e54b38f0dbb5ae6b87a28323ffe7d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUBEC2340168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd765ff017ea84fade2003d05170803d423bdebfd2642ac9e95a326ce928711ea. 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/AUBEC2323866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615bdcee6d6ee04532e0ef80080314d0541fb94f248f491e5499308e89d8e6de. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/AUBEC2349170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41d43b347b1b5adcb0f411039c0d0bab56eed3353a67f2de516f2bf91bb4b76. 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/AUBEC2349171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c49d860be13b72feae52fdab8b8f7a5838068545145d7353d4af75b7e5d688. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/AUBEC2349173.
Soma do Amor (Part. Casa Fontes do Amor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b3be56cd2bc136bcc95f7caa3331a3207abbb0d7abc302f04be7e001f59c36. 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/AUBEC2349176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266b9e951567f65b50203a70a339daac011cc9bbee62695877e879e829141f10. 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/UKXN22399106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b12b6a7a2f33ef326973ece78dfaf7ac783ceb7d375c8e548d150ff9dbbaef9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/AUBEC2358977.
Poder das Medicinas (Canto Tradicional Indígena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2684aeb1af83d8d3488d27f4185ee1d5d7b8e4dde8ff2b41895a8faa4d8910. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/AUBEC2358978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c30d33263c6f3a2f408d2ecfc3d6e0773f634743cbdfd9ab264939e47032f4. 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/AUBEC2442735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532046b26b0e4e6bb0a603a85524098dc15ee04a29d957605270e3a8664eacea. 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/AUBEC2442736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72714ea8a4e0360eb25c9caf69fa02d86fac519b0741be527e424ccf6ccf406. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUBEC2442737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e8794c9cfa6ab2dc271bd8b4b6e70a8f30938db1625c9b2f28912b025ac08. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/AUBEC2442739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509f220a3f3f5750e5d15b247d3a6d12289a0624029c32e7ac25b6e9f6e79e47. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/AUBEC2520860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e7b43bfe4b2c8389b03447d3d381885320dadad9dadf807ddb50964c0b7e6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUBEC2520861.