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 0x0b6ac9d4e17f479ff0aeba2e474ab7d2ea8b43b7183eed19eb1247cc3dfb239e. 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/8cd6823e-0860-4698-8bbd-1952d34ad96b.json and https://artists.proofprofile.net/proofs/artist/8cd6823e-0860-4698-8bbd-1952d34ad96b.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 0xde439ccaab98ae370458174441da30621f9db7f0357529234b58a47194216a08. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:14Z), 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/QMBZ91633630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1d8f33a74033b656408012eabb26fc11647746897f92ab502a3b170e82aeea. 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/QMBZ91633631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e885716037a6d9c9eb4af025e5a8a0d45265a5ebd77d25f7dfc07966a31b36. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:06:04Z), 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/QMBZ91633632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0b15dcd3688e56ae931b6c590d012c4d676cecd0bc4a0833fa70c3ab18afad. 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/QMBZ91633636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59df54b5a362c4bd08c36c1348eb410dfc167ced7e9c815b303e51d63764a70. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMBZ91633637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3412eb5e6874826ab372e982496ba22e9bd52f60258d5fb95fc8679d3b350437. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:13:21Z), 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/QMBZ91633640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f88ddd19321d65b74a6836a198b1750c9382438b8f9eddb887f25a6c5ff8ba. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ARF079701855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c111b369a4fc8be034f4d3da1cff98ef5d77f8d047f1c1d9f3a53a734fba79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF098100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d84a7637e67000ff3150949675fa9112f76a8155b2c8af3ae7f09c9ff3090f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF097500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0ad7a90e9c030a1a4573c47fb40fb6ebfecd31274f35d0281e622a00fa7f0d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USZZR1200971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30808a25926d4592dde0919211773da79458400ab9548ee66d601d4343baf330. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/COF019501380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a5d33e79cf0f123462642fa994bb88f8b6cf7f5013c3155978c991438c029. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:30:59Z), 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/ART721310505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf481ead855844f08a486a3d18240cf780b368a196f22cc77b583287043ed0. 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/ART721310514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1b5b502e8ad2d46fd64faa6f7e3a0f77fab843e599971d81fa42a28d377604. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ART721310515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529607884b72cab585c3d775ffb3e8ba9d3ea140360ad527d7537acf41f43c06. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:35Z), 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/COF019601860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41556e734ec6eae5d6573b3b147a334ffd47edfae925a2aeb71ea04087edf99. 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/COF019501386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78f1a3d55e429bce887e4321a536238e19e15a89f777d1fb35db5a650a3b5fa. 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/COF019501382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa375cfbd6cbaaaf9c5b743c16be58cc70fd942c8fd23da57b02d21b904e878ee. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/COF019501388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2969cc4772b03f002f6d5489dcc33aa402b29fddb663cfdce7e70fd13d30c2. 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/COF019501379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857fb437c648cd82fc7f8705cc0c730812506924e3b0a3145aacce0cc85098c4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/COF019501384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadafac3200bb00361300f2ee6de9dbe8dfeb234e2d9db11f82af6dc0c541ab29. 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/QMBZ91530362.
Abel Visconti: Dúos Que Llevo en el Alma Y el Corazón (Volumen I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e576b1a33d33e31b31621f9e3c915556bdb30d86a82085a722529797029fac. 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/COSO12000071.
Abel Visconti: Dúos Que Llevo En El Alma Y El Corazón (Volumen II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff1d680cf459c6ffbf5a6b6d94c4767e6754f1d00d718bec36a0d7c184c9be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USJE61300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879b0df24a53d50325b986266b292a8ef3c784deccab0f8ce4e18e96828be99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG990901768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140541443ad9eb2cb82f5ecc2a70f81a08708f71ead6c25e3e42647021f7337b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG991024250.