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 0xb742cb406107fbc854c5886b290ff3d7ee8f9f02429d540a966aa0429b6c5beb. 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/0230cdae-f519-42bb-9ddf-a88ce9a671c4.json and https://artists.proofprofile.net/proofs/artist/0230cdae-f519-42bb-9ddf-a88ce9a671c4.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 0xee7d943f2accdf440a6664af62445b0ee94b6f930fd8087f318b8c1f2c09f996. 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/FR6V82672120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aa53ceb5140fcc33f7a470fec6bd19761c7840177fbbea1499aded3b729d26. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/FR6P10600600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349ad243a4cfb80d6863b3d533eaf6a5df4e9ff839da612a19c47fc8dc0b6dc. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FR6P10600920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca783c1b7716bad3fb50819bfe83f8fd17fd30b0e3e47f728f563b81e3f6ccce. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR6P10601240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af13ceb599bb0c0d792d77d2ad907ddd054ba7d514f707beed3f0ae24b8b017. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR6V81151013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4f9781aaf24dca47ef365d63a7a4ad7751a881510ae2329ddd7e1087d3ebd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR6V81693153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34129b59359235c375cf60a9211f4ea8c8e9f6b696c07723aad80e6aa8f3fb63. 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/FR82S1300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878ac698e649b9e10bd21854b22b202c9074c9f62078bb790cab92d7295aa790. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR82S1300167.
Je te donne mon love (New York City Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e08cce736726f5853ee80716edb7bb779a7e0daf99b908200ba7dcfe0507c. 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/FR82S2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba70dee2b83e78191c06f75a39674d556fe74c23ed29f91a4deb954817388bcc. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FR82S2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77a838921fef22898ec589dd31bc06173af2da8880cf7da813f22bca3957d5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR82S2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e08cce736726f5853ee80716edb7bb779a7e0daf99b908200ba7dcfe0507c. 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/FR82S2400060.
Le Grand Méchant Zouk : Sonjé PSE (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2382680452212ea45b4fc29e294967a2d3b6e9a442aa83ec8a272d7b0a9d1c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRXZI2000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4abe0484e3bc29cd20735f0aa67fa23c8856458a9b24e146a418aab3ef5d9da. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRXZI2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77a838921fef22898ec589dd31bc06173af2da8880cf7da813f22bca3957d5. 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/FR82S2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde885923812a629f8d9c868fb1ba56cb2f0f4bb782c7ad0bb4a9476cc86cf112. 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/FRXZI2000400.
Unis-sons (Collectif d'artistes pour la prévention du SIDA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843cff98a04b71dd4df3f4ff3a522c2396bd4262d5fb74bc386cb5757f55c835. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FR6V80506985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ccf743d71b0f34dc20137cbf4759c80505b072df0f22c34b2f69793ea9c450. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR6V82707687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2c9a2735f1a29f64b51bc69934159082f2766219b0b99ff6fb302a4df0fb6. 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/FRX282035554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401a7c817713a18cca93cb1ff3359d6fcb5cabc90fed882468677b77e227015a. 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/FR6V81511516.