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 0xfd54ba6ffc06c09afcb0a9b0594a82fb4c512e33bb11d644cff95c7d5e2d6c4d. 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/c60cbdd0-208f-473f-9c91-a2851a70cecc.json and https://artists.proofprofile.net/proofs/artist/c60cbdd0-208f-473f-9c91-a2851a70cecc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2por1 - Puro Mexican Regio / Sonidero Freestyle
2 por 1: Puro Mexican Regio / Sonidero Freestyle
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 0x43b65b2102ecda6b1fc341bef5565b97ef8b6b40e38a38a3ffa7ee337e382a5a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USZZR0910185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f7a6a0074a39179b7d0eadaeccdb7ecf6896380a446f2586d6241366dccc0e. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USZZR0910193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53df10b35ee0358cf833c3fd35e472f49ddc3a496d69b3700ff781560bcdc6b7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMA5H0911436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30a215b08d169e274d182df72534fed8b407748a4637b74e9826587e0d294a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMA5H0911437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2686c6a6079f60d0f83967a8bb5df26e54a4dc086cd50ea382c0eb4aec873f51. 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/QMA5H0911441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241167300077823e7efe0e2b2289d49c2ce10ab0d079c868904bb07e115fcd86. 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/QMA5H0911442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325860913450cb7db36996225eea9ca3a05fb854c8a811684d41ac6edc8fa38. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMA5H0911447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce499ca5beb6654214442594de63cd0e0f79ff4f2c1a937674e002800629becf. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QMA5H0911448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177be2ade4fbc794a5dbc17d1480dcbb1d895d02f73b535cb4f27c6d2f96d1e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMA5H0911305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1277cf466e03976585a284d5308c75e349dc550116a1cd7f7dba32fa571fed9c. 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/QMA5H0911306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fae90bdc00366ca92232856717dfd54d3d8ba8664dd3e3110764675cc080ec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMA5H0911308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ecf8c4c77b074734107a7a61ed88c9d9cacabee284932e64ded27454d3e292. 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/QMA5H0911309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7402873ed9a28c60136d7797e93bcec41a8e45c0ac5b1aee2e906c3bd4530fc6. 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/QMA5H0911310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f64fe9639f8e260d6c42a04070d180b20bf3a50f4c771e68d4a16982d3adbed. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMA5H0911315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7fec5978e579afdb6679adf628fd5a0738f2786f57d9f0034e986703b8f6e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMA5H0911317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793c0a27b81e6c79adaba198e022998194d8ec6a2386df8004b6887edf4bf9be. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QMA5H0911318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669e8d2e9a969993201f0e1f0393f265f16afc0ba326acff3c4e40f25bc8d55e. 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/USJ3V1323270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4e7d0c496d1cfee49dafe1b5a3ca0233abe179dd00e1d5f45446bff30a9d1. 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/USJ3V1323275.