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 0x4a2995580088818861b84f6157fec323c7ecb458f6d39917403e8a0a7b5537dc. 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/658ac3e2-c9dd-43bb-a1c9-3aac1189f52d.json and https://artists.proofprofile.net/proofs/artist/658ac3e2-c9dd-43bb-a1c9-3aac1189f52d.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 0x28d06ee4f64b6d69ea2073000a3101d0ed76bc06493a872df16d29d08a2fe819. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS652459546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09c2e4b0e3564e7f1e7dcbb396d8001d403c540684d5a795cea4a44831412d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS632466030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00ab59debe4272900e0e2cb74209dec9c227acf9ee263ef5d694553a6fe31e1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMHK2405750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108686d9f77e8b0079c030efd1d2a7a39b8fbcd02f71e35b26a8cc7972b440a9. 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/DEUD42440792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7c68d0cd85b61b9fe75fdbdbc4febecdea95ac83a8bf99fee0a3176879dd85. 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/QZPEW2560817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245f7fb5da933581d9ada337c6b91b676271fc7cb5a66c3b3a9d199a6a2d482c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZPEW2560820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a27f7a32d1a156bb1b9bed67473e75c4c77d67851912866b7b5d4c9649e8fb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:51Z), 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/DEUD42553842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897d5361c71a692e3ed89dffe86b85009f5f26a1ed8095c3dc4641e730d6860. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:25Z), 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/DEUD42562244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c7714e39ddd0332d08296659c9f4e4a096d97c302746e6132f1e1dc0d787c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEUD42562247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164e1d7e3de2d4c3e0d54fe6189be1bc1e0c42081aad259fbf5dbb0a86f2a090. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZS672531909.