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 0x2cf10bef93c7aab98f7477b2dc57504f84a5f06823baaf4757eacc89f6f6c5b6. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74187646-53b2-42c9-bdc3-867f41c1fdba.json and https://artists.proofprofile.net/proofs/artist/74187646-53b2-42c9-bdc3-867f41c1fdba.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 0xc06ac0ba11dbed6e0aa0284f60d117a5bd2375714e6b54ce3dd76595d764b663. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX9ZT2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f28a142727638a26f9a1a1682f7f1562da4b8dd245ca7d0d0eb334eecc105f4. 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/BX9ZT2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7033148f7e97c85730fbf397d98c33d6ad9c2c812b3da6e574c236723073c46d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX9ZT2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f28a142727638a26f9a1a1682f7f1562da4b8dd245ca7d0d0eb334eecc105f4. 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/BX9ZT2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c812a5072c11f4cc560fe677b2130db5e2a59533b880f88fc2fd7d6092b158. 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/BX9ZT2400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ac0ba11dbed6e0aa0284f60d117a5bd2375714e6b54ce3dd76595d764b663. 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/BX9ZT2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff6aaabdfdb220cdb7a9da9c6ddb6777fae5f4350e0ab99ef3e1cd03cbc3476. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX9ZT2400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d1a74d6e7e10b29041e3f18927dfa884a450c792fb40031924c32d9490bcd7. 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/BX9ZT2400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e68bfb9763428c5ec73c159b52b4942714393b3618a0364b996dc692e17e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX9ZT2400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbbf00682a22e8216c66c9095b08bd6d0ceefbd5e65606e09fbb08c5af109d0. 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/BX9ZT2400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edca95100318b653ed62b1d8e151ac3b8e1daeb5a4c6e1a49f11f51ec2bd392. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BX9ZT2500125.