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 0x26a822e94c4f7bb5e0876a46c5d6f48ff7617dd7583f004a600542f4c9ef20b7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48d2e91a-50cc-4883-ab74-f61412597e3c.json and https://artists.proofprofile.net/proofs/artist/48d2e91a-50cc-4883-ab74-f61412597e3c.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 0x9406d57ba531384726749f7a35ba9ce9855cb942a1fa7a8d02c1fbe6d86fdd0f. 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/FXQ892400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b1948ba96cac0c35e10b8f2722a3a2b5a3b6064d4afd56a528e32787daf514. 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/FXQ892400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca30b37d2761ffb58cb8b942c39e672f629476a450928ec2af3d05c83b87100. Chain 2 (Bitcoin): anchored in block 956970 (2026-07-07T00:37:51Z), 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/FXQ892400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e1854872511e06262c89d61de132240371fe9e86c81a7472c30a01c34beb3b. 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/FXQ892300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8918407239e1286a1e0269935817f8117ac56a774f9cb1f85eb48097c56249d5. 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/FXQ892400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8918407239e1286a1e0269935817f8117ac56a774f9cb1f85eb48097c56249d5. 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/FXQ892400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0fc4e1bc50b43d51ea34277b694d1c3010a094fefad5427dcf41164aa47640. 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/CA5KR2431212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8f0480554a8b90c6cf8a1bbe3524faf512e006ec53156297e8e3df232050fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR2377965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca30b37d2761ffb58cb8b942c39e672f629476a450928ec2af3d05c83b87100. 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/FXQ892400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1838467da118466e7466e97c31dd4a6cd1defe845699a57e865432532bb32e. 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/UKRPL1900583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5320ad0c5d08525522ed736b8c423f8f46b5cc5271b52ec9f34032f24b8bb. 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/FXQ892300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e1854872511e06262c89d61de132240371fe9e86c81a7472c30a01c34beb3b. 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/FXQ892300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055d51eca952a8530417a291466e8fd3a32ab0ac46fa0e8d38ef9d3e9f2b08ca. 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/FXQ892300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cfdf40c3605c38247fe05600395c1471d9ca9027e8785d17858b7be2793ad0. 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/GBRKQ2256934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e27fd0dd0cc8c55d5639598fb53ecfe79e3df9a128e50a5c28287c689d25c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWT2356490.