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 0xbaf31a318ce3d77ba2d8f2e836f5e17491376cf6dd7bd300e6343379555aca71. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42561b93-20e3-4a11-a895-88703ab11aa1.json and https://artists.proofprofile.net/proofs/artist/42561b93-20e3-4a11-a895-88703ab11aa1.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 0x6b82cdd341458b9aad33b5b9402da98f069f3e31fa5a6b60e2520f4753c8d97c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:53:04Z), 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/UK2PP1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a979c34b338a776dc8c12bd2c55d4d5e0645d8776965ccd64549a3bd47b4c8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:16Z), 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/UK2PP1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64fbe70da6d7f8e3de8ff503d57c61c8877c67952860c947352e80b7bcc5ac0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK2PP1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1331bf9b06e79a68798e80c021ed266bb2a689ba2cbe81580f7235578cd88ef. 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/UK2PP1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5102a9e996744d930daf5c1226392e2aa2e9b7fcc655199a626f162df7c95c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:19Z), 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/UK2PP1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e83cf757c01099860705761031591de5bc31e968d25056d3ce0ab33efd6de6d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UK2PP1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd7beb6d931c23b8a12548537ae898dba16e00de7d861a05fc72b748d278ed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UK2PP2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd7beb6d931c23b8a12548537ae898dba16e00de7d861a05fc72b748d278ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UK2PP2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6ec186c56df0cacef84ff06c538d697406b2380ed5ff4d44f0117608c8f715. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:39Z), 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/UK2PP2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc87f92e71ee2cbddd7d1d2ba37f4e53bd7c5f3dcf32e3705257eab2907b919. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UK2PP2200001.