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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a02f32ab306e75810fef270f4caf75c7f8343fd16789eacd33741830c67d7a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaeffa92-6ce6-422b-bb50-a024969185ff.json and https://artists.proofprofile.net/proofs/artist/aaeffa92-6ce6-422b-bb50-a024969185ff.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895664a8aa44003fa961a6c6fb89493ddaa2bbd4f6bf1d9838cbe4c2355f1363. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/CAENV2508958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6efcb0b8a964b12385696d2a2654af6c24803aa8692312d0ef010c23266a08. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAENV2508959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca77bebfeef190a2ce1925ed9f71380050c5a221847840eab0ae756514567ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAENV2508960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f6448f99d9dc69c91ca799b5bcd26de3798bf4d8c72f65b46010d8622f2251. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CAENV2508961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d703990c91558ecb97d65f2f80b3b4f9154a97e01ff3911d850bffe73ffc15. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/CAENV2508962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ab8799d67fd14de79cce056f42a2ac2694f50413368c128f278b86b2266a5c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CAENV2508963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686a1ec315dfceef0ba30566a5cd2ca484b46aafdddbd1555982f784d81ab3e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAENV2508968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c822d104ebf810a8046a579e0fb81982d2b1a2145d2c29aab1dd96add94b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAENV2508969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23958594718fd6315935efe8b147f381355fee40dc909f801453e06d2fc742. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAENV2508972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8843a599984048f73391246fbb01b25b457d3a20c69b5b3b053ddc32660b4b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAENV2508973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9467b30313e1672b62e86c6425c014e03c62ebf9f088bc5eec9b68940a0cd7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAENV2508974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d662a8ad6b49b5411d9ac12fe84df8136a1e2239788c0a53b5a46f58f7f132. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAENV2508976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd044b0083f640281f99dee7853b1193508cd0e0a5af62f8d177d854bd7a9d7d9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAENV2508977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1c4b30257879fa43e529c73c9f750ce6aa0e4080313e54c3e9b5a2006a4d06. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CAENV2508981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176de305718822c9d5781f5715dfacfe35ccb6edc74d75c1cf983fdcbb648704. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAENV2508982.