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 0x7f211cfcf5058b85ad90f157e503dea170a31306e3abfb153a9c46a96b4c5a7e. 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/6ad6fed7-6107-4416-b03c-4d98eb869edd.json and https://artists.proofprofile.net/proofs/artist/6ad6fed7-6107-4416-b03c-4d98eb869edd.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 0x42bd65edbb50fcda8592f13ce1c053f6ae25a65c3ca80f87fe386e299069bf28. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/ES5700300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa294d4ac449b2f3b7034ca2f93367aed0c65bfba0d82f421bc760d902188c5b5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/ES5700300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bc521faac1b69df081315133368383b5f12720ad456f879a3a2cb272361489. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5700300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ad229409d3e2f2176a192a25209cc4ca8a6ae78595819245c7c2d875cccc9. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ES5700300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23949e44dca68d9f748f05c5235f505725bff8b492b8e6a956b6a59c55a6c3f0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5700300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e99c2e0dd736195d76139a0531779642171970f961740bee6d5976d3df5b4b. 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/ES5700300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa294d4ac449b2f3b7034ca2f93367aed0c65bfba0d82f421bc760d902188c5b5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES5700300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bc521faac1b69df081315133368383b5f12720ad456f879a3a2cb272361489. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES5700300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e4152d4e5added320c4224cdfeafa376aa86dbb04a32de27c2c2f8f2d3744. 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/ES5700500945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bb69134179d4b71b42b77c605bc59e2bff9ac11e8877edb88ae4752fa331e. 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/ES5700804307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c73c04bf074f24aad6e7ab91a3cb701ffbfef5e1aa73207c2fe793b8dac48a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES30E2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78148b894c1fe505d12f9bd6e93298eb8f3bfcab0997be9923d2877f9f144000. 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/ES23D1702107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c0218dc8e8b7dd25b6a3a5e6f44e583c609349c8a6e75a294d92477a6cfd0. 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/ES5301252055.
Suite Festiva de Éxitos (II): Dirty Press / La Prensa / Harina De Maíz / A Nuestro Aire / Vámonos Pa' Jerez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29accd0ab6d6e07ca57a82dd7cda0ef61e0280cc2781618158ce3b8d194b03a4. 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/ES5701001273.