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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d253215878b70a28cc96c78eeb7255da634e3334a03ca58ab6f356028206f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3510886-a07e-4e72-9c04-c4ee85fb780a.json and https://artists.proofprofile.net/proofs/artist/e3510886-a07e-4e72-9c04-c4ee85fb780a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3d95e94139c22d3b51799e6fd3b890d451530793a1c2b48c1a58b2b4ecfb79. 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/DEBL60520388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ded5cc804bdf9e7c25411497c3a552d9909f449c6963d20501ab5a4ad5b4d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6QR2300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ded5cc804bdf9e7c25411497c3a552d9909f449c6963d20501ab5a4ad5b4d4. 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/US6QR2300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83035c51b39aef7138940cda8d1fb7cb865af356bd87aa24af0aff17f3903ef9. 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/FRS182038723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598be70bfedae702723128aac9cb9ffedad6766d2364e117599e81999ce567b3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DENQ82400052.
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 0x8e52d31bed96edc7c41f5bed39ebdb491b81da32166f00a649fa9f4faccf6d04. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DENQ82400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd718b14a6e730471855a2d90f1c05c0132d0d39fb8df19c4bab7586569a42de1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DENQ82400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a83b1d589cd378495fcfe9be197d5df84cec739a8f02efd6f40cf40416eec6f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DENQ82400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07ba8ee87066b683e781b11aacbf3e6b069652b25e38374ffd4f85983e8bd6. 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/DENQ82400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9736a8d1e8b838e4d0200cc2cd5914a76fb6ba5c2e5250c384cda46f2a0a1. 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/DENQ82400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9f891c5081b27c912d207792fd583813bd522f9d0675b5626a29937a11216. 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/DENQ82400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7e1168bb7b15d540d1b51966bb8f2b67563aaeff114e0a296a978e724fd3f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DENQ82400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ca680f74ec8cf8ce6a6f4b4aae3f8c55978efe31be51014351dd05b2a362a3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DENQ82400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45965dc56ffba1a308d2db44cd978582558c7106a68c7d85ce8bd25572b02efa. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DENQ82400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbce44a0342e5b868b1887aceae28a286cffd5080b691d75787e3b78a0899b6b. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DENQ82400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b7085889cbb011a4c45ca8f2abbbc5da328c7e934f59c9383a14f287e6fd88. 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/DENQ82400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ebd194a240e755590293ea9d5920d7f2562240e756ec82a39052c3ef91bfa9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRS182038727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b926eb6f7cf5cfe1b842184d91c76e121aff47a51816f13c0db298c5b97da4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX202051046.