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 0x46847796fe5454ae8498f20c853eeff9e4192d2fde3b792418e0d18ec71980fa. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb75439-b6a5-44e0-8206-66d81ea4b1e2.json and https://artists.proofprofile.net/proofs/artist/0eb75439-b6a5-44e0-8206-66d81ea4b1e2.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 0xab88f789e8b780b090e5dac8a9079e5a5f0ac05496ba9d159c04e023512e78f7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMR82501122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196cd7fff0b3289be59cec7829639f39ed6cfc17b07b23d25cc8adfc80f68f6c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMR82501126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f11a82fed8657818889bcb499b098f541f1cf5326b2b3bd2b4c7ce74de777e4. 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/QZMR82501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbbe949feb40242fe6d40026cdf582b866a9f5f90022268c8538e9715ecb65b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMR82501125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823ef985b3583e61e9ded8b04cc8bdebba24baf253666a02e027e967fdc88c2. 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/QZMR82501127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef8704347853e4dbd1fecb519808203699fbfa5298c49c45db6d80461702c65. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:15:52Z), 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/QZMR82501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4795d9ba84e9c2d5e283e53984def4cca6b78a66fc08fd1f428219cf85c18605. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMR82501129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350f43eb2603296a92f6aca9f975831b20add3c4287804290963ec746f70918. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMR82501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51003d8505c9230910a3addb0fee669524fdf1527030cc2cec6ea94be27f09b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMR82501131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0241dc888156a48f41554a919ec6e9f635969067f7fb73734378c95b7f7c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMR82501132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46134882677ecbc039b5c5db50dab81a80441da11f8c9eda88f77981a83ad9c6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:22Z), 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/QZMR82501133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc8f70f5855be8e4b2e329f0e4f16d8bd733df9be12245420280ad423bf2bbd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMR82501123.