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 0x20fb53895d7204f7a3bc1becfb58854efe4a626fac06478d2e19453a4eaea52e. 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/b2427851-b1e1-4c1b-9e74-efbf04935de5.json and https://artists.proofprofile.net/proofs/artist/b2427851-b1e1-4c1b-9e74-efbf04935de5.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 0xc0f8289f21bb6ff33c16732694a711c33656ec5260d11a63b0d1588908b711d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1545101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bce5c37f6ea74cd3104e493570a6d930117a68649c31cbabc0b14b5f21938e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1558119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ddef5def780227b40ee8a42a08a2455fde2c31204f6af5d1ed2307a0d1971. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1555192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b9bd5def5712426205674d680be16344a4990c126045ce63762a112374e86. 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/US23A1558120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432c53847974c3d6eaac3d08630a8a28eb71c368941a2ae1ada0f96366eb614. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1558121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e0761c7dbfd9ce97f22a38ac5bd757246557b29d38fded5290ea17c2debbbd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US23A1549698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37faa13b3c4f9503cdcef42014dfd8d8b4f40f241bcae44ec62e871a5f6d8b1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1558122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f243db7a1aa8f9d2b88306e804a8346cf8106efbca0ebdfccf00adc151920e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202403294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ddef5def780227b40ee8a42a08a2455fde2c31204f6af5d1ed2307a0d1971. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1555192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e0761c7dbfd9ce97f22a38ac5bd757246557b29d38fded5290ea17c2debbbd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1549698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8289f21bb6ff33c16732694a711c33656ec5260d11a63b0d1588908b711d4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US23A1545101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78126d08b32f5f926fad0e21c2da8c0a0fcfc1140dbb36eb9dd3c2eaf48b513a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1515137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4c900914d14764c3be5a1e3f65ac2b9058fecd05ae58f18950ec15eb257b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2095296.