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 0x1c123003de2f9103c20173c3066fdb76eee7e78aaacca2e0975cdb6322fb458c. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6422fb2-45f9-453b-bac6-a926412d77f4.json and https://artists.proofprofile.net/proofs/artist/d6422fb2-45f9-453b-bac6-a926412d77f4.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 0x6fef945d4005075ef250dc1a1d728242883ce3b208bcbbcccc1d802a7f31c6f2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NL3D52400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8604005b7c91725dbae5b6095b1a97392671ffa5a15d731b2ddb9295587441. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/NL3D52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddc29985028e648170b608026bfe70e9e6b53f2b0e352d4f11b08af12697b7e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NL3D52400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83ef3cc62def6d09c7683a5c420e9f6966d89e3c9a49ecbe158430920b7ccdc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL3D52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dd22038328b0f2acae46669d92f45ea5fd210153270eaff3387fd50136bc0c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CA5KR2475965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfcc993711295190be34784be79c02d19f5af7ae3fb2dad9ee6b358673395a5. 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/DEH742503715.
System Failure - Raffaele Attanasio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a1e607c597e625709e6ae3bd845be000e722bbe94f471c7672d58d894ae4a7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEH742503716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da6bcdc1ae9c18defd17423269592d2fa92fed42ae6a94d33b4b9f34a9e996b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEH742503717.
Camille Fatale - Rebecca Delle Piane Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b9df317e70340aad266bf561b915e9b91abe6a56a2cd9c5b06a5a549777ff. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEH742503718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3903957ab8efdf1e6c9e21caea3449ddc11491f8a105ade9e78f9035df09c259. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/US83Z2525851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada473f3cf559d2b9b4a0a8acd9f36136c4c0a9f249088e8f3b4f18046ecf5a. 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/NLCK42401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dd22038328b0f2acae46669d92f45ea5fd210153270eaff3387fd50136bc0c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2475965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1b85e35aacb41bbfe0803a21769a0754fc8ecfa47997f14ecc2f4b92a3fcd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKN6K2401072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c09cd33584380240def12f2236174e326d3b5b4b240280606b2135d7cb70ef. 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/NL1XF2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e401297da5954e8365695180eac7a5f6d54d77b5478156e3cc8a6830b01ce4d. 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/BEN582001146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463cd0ececd5e5a44a3a51dbe44230dfdad02bd4235f7a6c2fea0f0ed4fb2fb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR0017549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce861429afc8b41bd4ff53433fd9d3496248da66cc221d30821e4ff278d3f0. 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/NLCK42501496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5266630318fffba8d60ebef1123fba719dfff5081bb925f121603cdabf0fd43. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42219278.