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 0x99b3be418c669afd92a0f8fb93b9b2f9e5ff7ac05dd2c7de300fdfb28443ade3. 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/820478df-ede6-49d9-a022-3de8cc3078ec.json and https://artists.proofprofile.net/proofs/artist/820478df-ede6-49d9-a022-3de8cc3078ec.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 0xcf1e4c690070aa5da3146d7ca9e3f103ce3e8d5093bbf5690dfa00daa6800989. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ2J21505278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5224449c765cbf74e5f177097f9eba736fcebc8e936a016749873c0bff5f991b. 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/QZ2J21505279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd642827c2c1dc5692a502fc18c003ef8f7496e59a21a0af78065e53f3b5a16. 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/QZ2J21505269.
Kings And Queens feat. Lexico HT, Ch Gedeones, Eva Nova, Fanny Plaza, Tomi Perfetti, Mr Yeison, INDYFOR, DesXa, Ada Betsabé, H-SUFIA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874c8898943d3ef591b5ea505884d66970131fef9094c83a90a9caa61f59555. 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/QZ2J21505281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff382e631ed2abaf8d1a1b0f85d38f4616beb7225b4f4609b5adacc2a08b3b34. 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/QZ2J21505282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b334e264ce8e74ec0ea49f27100325fa4815f7d888a2d9c53210bdee35c70. 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/QZ2J21505283.
777 feat. GabrielRodriguezEMC, Madiel Lara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d631c83fda133c63d5af2363b299a73b116e2ee4497c5f5ba711cb6eb3d8. 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/QZ2J21505284.
Me Corre feat. Pauneto, Vianca the Grace, Borrero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32156f7c358afced725886667e5e908cf9c335ad64d9a435b284e28645e7c2d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ2J21505285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d88c8a6ff26836b53875ecf77b22f0cd3bce9f4218e18fe6cc15c108b8d4ef. 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/QZ2J21505286.
Frontin feat. Niko Eme, Temperamento, Wolandia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169754df4e2501e361d9bf330c0b82be7a7f0113f011e142c93b192076d439ed. 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/QZ2J21505287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c563ccd9372d6b5b825a9d3271fa38cf91eb3a6f4b6a597372d07dd5f576ee. 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/QZ2J21505288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9528297418143921d3da907a4e558b0f54b7bfd393eb4703ca33e9d82d1df445. 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/QZ2J21505289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b5ae25048d90cc63b55b954ec50bd234ba63f9ddbd5fbdfcdff5c6be17916. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZMZ92466426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd526f91372f22935bc3dace72149ee048a7fe6cbc77be24ecdedb627f09ffe9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTRX2437682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f321032c82b36c98571226eb382c64c6b5d9795e36856db7cc1fc401b680f5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZNWS2206177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7080213b317c29a68d66020a4b6a059023754b60ea2e148e8c09a68e98ab6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWDD2444454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61197c3546434c7a0f7b08ca37e5111d062dc75dfd24194239063ced9da906fa. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWDD2444456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f28ed58f7e54a603e2203ac1779a6ef11f3afc674923aa2f1d1f030646c186. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZWDD2444469.