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 0xb59b78efdb31e96b4e9c2a7bae81ba576ab619cbf3cc426bad60084887a2d079. 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/2d3dff20-aefa-434f-a44b-1e41a7d45725.json and https://artists.proofprofile.net/proofs/artist/2d3dff20-aefa-434f-a44b-1e41a7d45725.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 0xbb873c66766eda0fb644b23817696e76b379b91ea54f0f07ca855a97e05642cd. 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/US3DF2151741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdedad62aa4b035ecb7c5b0e284afbd3ed887d076759eaa9292493ec3e79a55. 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/US3DF2155048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13befb5a86f92fcd182e961b3ef9c31f659010f7be055536d41c4d8806e7093. 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/US3DF2151782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570357dbec387344fea9602d364f999d885ea9e6ad1ce54154675f4837559c53. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01afdfe41837055294ee27a3103e4ff4c857baf15d4ae59c966191bca06a685d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06bf8c1d902502ed98c690f248e2dac133fd2dde282208bcc61b318ba973bd. 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/US3DF2151778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f400e100a187d6a1a6f0f702f4a142ee055c81288f05a25309ae566dd7dda1a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b5b239e6a59415381ae1fa05fd4ab1d301e3dbb4a1ab3ded36a5359218855. 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/US3DF2151966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bb728ca58045e3fdf608e3e45236ff27322874346efc5cc289d31c230fb56c. 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/US3DF2151758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b768a29b043a6d94ddd99a9906b98a3ce095a2625b22caeff1ad774ce594b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6a8d08dd1714564cf469f40bcca3687e4ac2795ea336b7d9feec809be151f5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6aa03d8047618fdafccba6acc0eab43e6537a160f0b29f4c72e95a6205090a. 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/US3DF2155532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e16db5f48f9a6c07503907342eb0565af3741f1fa7a5d1df2b9ffbca72e2e2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e002a0879b7f1ddce2e787612bcb340350f6cdaaaffb7c419f55423fb31de. 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/US3DF2155559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bde26c37c31ba9a2da7b2f30b6d3cd52e0a7802c1480994d23c0189180d297. 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/US3DF2155561.