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 0xd23f80926ff32d442616e3c3c87d226c25b2c1bab415a93c9e29d3b8272f6eba. 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/b2e32f28-12ea-453a-919b-96e497b3f5c7.json and https://artists.proofprofile.net/proofs/artist/b2e32f28-12ea-453a-919b-96e497b3f5c7.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 0x91271e8ec0f875cd549106d8fee8484e877a43d81be01775551870b14618e37e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:07:43Z), 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/QZ2J21500930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1386f5db8cecc0b893f8ca79a47c4225518f5afac23dec2d67f19f4eb38ea925. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:42Z), 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/QZ2J21500932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bd229c5fef4137c5cfbed407fe7dbecc036fd20fecddf45ab77bad6faf5e89. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ2J21500934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfdf16e5c04a5da049eb788d41980d12cbc9f7d4cb3f0477375843cff2e6ad0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ2J21500935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a256f2e45f99b4327e5a4235289be40a66829412b666716ef7835664e6603. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZ2J21500937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42d5359e7cb1bfa3f8bdef76c886d022b287b5dd7e2a7168f83c2497d9888dd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ2J21500945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb149614da1a4813b7311c13177b2f6f0d8a3849c420ab84e59b8ac4c58bfd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ2J21500944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf00149061a0dfd0f84e45b7f13be51a931c19b939f7bc3be5431520057494. 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/QZ2J21500940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ca1c788116e0952769744e4f1ffa6832ea33aa1c1aece1c111d185a7fc3b0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ2J21500949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adc5e9dbbd4920e932bf43c5221e928c59cc09bdc3365b534a8e0f6a918ee8d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ2J21500950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d33c2165955a82e12530fcf1dd37bf816d8273d68cc83e71b70b8c4b27c918. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZ2J21500951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf62a2c6168aa617353d0b0d4fe439f4f38a41cdfa9eda7f378c0a5ca7bcc8e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ2J21500958.