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 0x4ef92ce20a9d64f6c85a63be1e8d215910d6f5d57b1906a7132587bdb00405d2. 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/76b265aa-36a9-4b02-8b2e-f23f004d0f7a.json and https://artists.proofprofile.net/proofs/artist/76b265aa-36a9-4b02-8b2e-f23f004d0f7a.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 0xa79069e2cd72e4674bff0b6e3210c28b9c76de42f19f84972ba21775eee61d1f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USL4Q1756090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0583a3284eea68f7329606dcf9e0bdf7f50499626de806b077cce53dabbaef2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USL4Q1756092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9c24b92eaab748f9bdd34dccd7d689a304c578f83e4e7aac21f69434683294. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P2044008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d9f126b953326b1d1d146f37cf5dd2314adaa1a57898be619a0ccc1184ac00. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USX9P2044009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded3d969fe83c0e4dce3457834d7d7ce465e3c26df5172ff5d1ef983d64e601e. 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/USX9P2044010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f3bc31ca42779f2ac50f31b4700ebf79a0d92a9edd3ad093c4bebef3539d4. 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/USX9P2044011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05968c1420e15e82820cc2629aadb8790136c45c28e69de09ab018b229efd5d2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USX9P2044012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473d443f3985aa7e8860ec32765a14d5a52d1c8fb209abfed0761ef4ae7d634. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2044013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d10341c385829ec7d80c016c822233bb341a33be3a70ad85ee5e22be27f70. 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/USX9P2044014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e8dd106f33083c0ef4ba2a9e83a171da823725646b9e2351225480db38c2f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2044015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b634a5c3b8e1f199e2f053de992c397a8df90955a7290b7e0571de2fec738ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2044016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313446710cbd1af81eebd7a56469ac9ff32a807cdbc7bbb2a04abd63bc92de56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2044017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d9f126b953326b1d1d146f37cf5dd2314adaa1a57898be619a0ccc1184ac00. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USX9P2044009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded3d969fe83c0e4dce3457834d7d7ce465e3c26df5172ff5d1ef983d64e601e. 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/USX9P2044010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05968c1420e15e82820cc2629aadb8790136c45c28e69de09ab018b229efd5d2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USX9P2044012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473d443f3985aa7e8860ec32765a14d5a52d1c8fb209abfed0761ef4ae7d634. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX9P2044013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d10341c385829ec7d80c016c822233bb341a33be3a70ad85ee5e22be27f70. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2044014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d28fce524eae1f8c9109a9c7cf67643e82878e63c61eb25a18ae1aa36a1baf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARIXB2403353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d28fce524eae1f8c9109a9c7cf67643e82878e63c61eb25a18ae1aa36a1baf. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ARIXB2403353.
Bombo Clap/Lover Beat/Años de Experiencia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749dd9f7c1c869d7de7773a29f42723302fde18579b17fdbda40858173754164. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZW9M2235468.
Fantaseo/Tejiendo del Hilo/Cartas Sobre la Mesa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41082633d242b59795074dc5a574a032b09c6fe530789461032b7415f63c242. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9M2235469.