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 0xe106a04ef8ee2ff3b22f632111fc2d15e4ab1a76dd40b641552bb656d52fba04. 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/b3005384-59af-4939-87ba-fbd140470363.json and https://artists.proofprofile.net/proofs/artist/b3005384-59af-4939-87ba-fbd140470363.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 0xef600d7abd79dcafa8f188867390a458bd9dee5f41916c4113bdd3d3db093770. 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/HKG732417252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6617577b4a91b5aaa06cf5b288289add65ae2e63eaf3dffe661d01d6cd73e23. 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/HKG732417253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03223eb7c820e48c2d741685ea27b0eb77c7361f09c611ccf4994095b79142ad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732417254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50767cfef12aa2e3b8071c7470241331e85d37acc37ee5eddc2f6d1fa25fa650. 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/HKG732417255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38cecbcddcd4e34fb874910465470cc5bb74fc1e0c48434f6b8ce2ef522efb. 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/HKG732417256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a741bf5c157afd99d07109d6c893aff5a222f488e817363d976d2d78a1848fa. 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/QM4TX2027721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bb23132f4b5b4afce96357d78b9d4870d86f08819383a08e354d7f2dfb56c7. 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/QM4TX2025671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d06f0fc46d334210923b84fde9ea7315f5db641a0b7ae4f05423b46f9176f2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732133212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b627f78a1d1b12e4c8352e9bda6a3f4490a07fb84a57d262f7e12d7d3caf5b8. 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/HKG732133206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c9182332e06a7d10788d8f4b787f9f0a9ea3a5908f7bc6d4164e2ffff5c36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX201971371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a042cab2c19569de871ca0fdfe968140eb82cbe3711fbdfc57a9dee18d4158. 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/FR10S1901184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98e702139836affb64cfc6272bea7cd7545130fb625e45dde17dafd3875cfd2. 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/FR2X41961113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c3a60455443ba060dfdcd50634d307852c24fed499c24bf758c72732080a62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732417334.