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 0x3a28eeca4718fe379cd21ab0cd9650d55aa63370cd21c6bfb1c867d4ff4d028a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f854c3b-6922-4eba-aa38-9599e5396064.json and https://artists.proofprofile.net/proofs/artist/0f854c3b-6922-4eba-aa38-9599e5396064.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 0x7e8cc2ac3d9f21bcacb4affdeefe4b4112b0a8f8a2c90c59a7ebc1f77f159888. 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/US83Z2148591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59111bbe874f983cafdfd5a902aa7cc702072949daccd0556ea3f5660ea778c7. 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/US83Z2151682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f6be54aae62aafdd2d7f1cfbd785b909ee9c8b74ca1b0b5ab35c673a916c6f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US83Z2351223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e06ddccc678e7a6534c788269fda855654e01fec3830922bae0257781a6ffd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:42:31Z), 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/US83Z2473730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a414aa71f0046fd04c9a07992fd22f9a6a512b6432eec95a6d2d3085412997. 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/FR9W12432892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87cd619aae349d0edfcfefcf87b9a2469ca083fe15cace491cfb8b19f3796b8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:00Z), 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/US83Z2403829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9762c039407bcf381e621beeed7dad5efc0ef012f53829f123d03ebda495f30. 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/US83Z2513717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e072e4b34d29a300140c8e6b1b844370a176547f45481e19b56b50e62ba1e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2121021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b55460242cc6256d0dd0722438b2d9845ef9fbb5026293eb35a474e782cfd3e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH741920920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68adb1e01572f6ec651ffc7f1423fd21b81763cdd91e0e4a7de9e859351720. 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/US83Z2132565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8cc2ac3d9f21bcacb4affdeefe4b4112b0a8f8a2c90c59a7ebc1f77f159888. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2148591.