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 0xb50792f73fa9cd8f1c0ff0769553f48fb4fef6707fb32a2c6e66a5ced5f3824a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd0a6507-8880-4993-8208-0a59270f07c5.json and https://artists.proofprofile.net/proofs/artist/fd0a6507-8880-4993-8208-0a59270f07c5.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 0xc0e67f93a0b1710ba7bd4c709b89147aa3ff65c9993245d562eed9e740065eaf. 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/QZTVM2335056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6689c339091847688155ba0f33d2e9bc953cfbd3a9d3d9bb78e78a9eac735baa. 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/BXP1A2100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1ba6145aa449fdbfaea18f59bd9da0a0e5cc84efc4949f12b124785b30bb9e. 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/BXP1A2100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53071190108f81b3f0e70631f3b64c4bb6b87b3c8e626f5a8c217156ca034f00. 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/BXP1A2100599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ed546be6975d1bc2e399fced7f3251b951ce5df7fef7edf37564e7e171b7a8. 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/BXP1A2100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b387df89ed1aa7656281fe7ce7d26815a9baf8cd71e17e9ea41f79dc467b747. 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/BXP1A2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26f12b1a300d1c31faffdd5bae0b2a23c5f7c17d6064760f0fbd04dc9090911. 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/QZTVM2115761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376b228156452fa301f4f41e14aa918e502182fff90f542d712c8d3e16dc5d3. 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/BXP1A2000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fb78c2c99912d2314bea794e1c11830260d07d9a4841e915fe1a60cf65705. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:05Z), 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/BXP1A2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e2fb7255f005869ac3186f5b37bafaa78a6ca772c7527ab6f540f8a9f5c18. 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/BXP1A2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621d918e4d586beae0a68c438a3138be8c50e0b3c7249aa448bf18e7c8cf6b9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BXP1A2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad72e5e401e6633d4402ea08cddcdcbd2373b1272d3087ff1a56fcb9de0bf75. 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/BXP1A2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde756cd8e84804225a0bc0039aab02a5c7ab8927306dec3cdac580253a19f6c5. 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/BX08N2300029.