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 0xcc83885894da7f7223dacc806bac209ad17f544dbd9819f3b2a31edd86022542. 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/4f3b2c8c-f213-43da-a4d9-e4f39c63b259.json and https://artists.proofprofile.net/proofs/artist/4f3b2c8c-f213-43da-a4d9-e4f39c63b259.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tentación / Amor de Mi Vida / Fichas Negras
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 0xad6f171d622d461b3c22588362fbaef41f109631387e3c31853366b9bf20bd41. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHZ62120512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189723761857e10aede8dbb7f7f5a65a73c0e5d6b97e32a5036a2911ba089ad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHZ62120513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832f231eafffc29c056488d6c118375340feb207e60fc86b684171a6117b65ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ62120514.
Siete Puñales / Hotel de Verano / Que Me Importa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc8e2de7e11d3df7415cdbc23110a4b9f79c6feac07718eeef1a34f3d908be. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZHZ62120515.
Noche Playera / Que Sera de Mi / Corazón de Dios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6c63992350dfa0aab2ecb8321510b3242f6ffa158e476b9de7ab615b851fe6. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZHZ62120516.
Pensamiento / Yo Vivo Mi Vid A/ En la Palma de Mano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8e7f48063b8c823b458e91f3845b0450ef02fd4016e36ab55456660e1d8976. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHZ62120517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bc669c35c0b4da81ac0ac749b2decb56a7c07fd71bfcb117c646b56ccc02c6. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHZ62120519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18cc46742d29c1ad1442688d534affcb7be4eca06903e5831c5498e01892dd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHZ62177867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6983869241c2a275bad12ba0930b72c088be81b431ca131b11f5ebecc5442c9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHZ62177868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320c80ec6c4c7b38102140dada0e2bd067c2a36082c77dccac9c500db5165d1. 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/QZHZ62177869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cfb9c248822bff6c6ecb4d96581251e671ee1733806b33790e8cf4ea358013. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHZ62177871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc80c44b8c7c492896a393e6da1bb221104fad0a8250c4ee6b4d6bcdfdc87cd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHZ62177872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf539c35ff5b518f127fcd794617c0de60914a167df78e4926f7c1b1138532532. 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/QZHZ62177875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e11674d6ff5113e56ed735250a3e0ae943776c5446227ff9f5d7aace452e7. 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/QZHZ62177876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017cba5cfc4251c910de1067d8fa8b4187589bfe37ef27bd87d79e4ad011f27. 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/QZHZ62177877.