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 0x81ab486816d4401e7f92e48b8ba3b514ffbe7c530719c392dc43c2ce3f7be2e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/378a55d1-3753-4f06-b069-68fbd8253081.json and https://artists.proofprofile.net/proofs/artist/378a55d1-3753-4f06-b069-68fbd8253081.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 0x3f8f0115818e52bd2037b70ccbf893fb58877e77ff093b171b072ef053670f93. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEKL51612000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c880b3ec66ceceeca96ef0cddc6241f74e8c27224a3d90c908e4a59ba923673. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEKL51612006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21750efa051676ff580a4b182d71c778510b9fb964b6d81d64264954cf87c1ce. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEKL51809003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792de23f61554b703a7ee29e83a2f5dcaa929f571339d25384f281c87df39019. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEKL51809004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fe75537e6f0607538ca2c78b150161d8c83f4be370839cd4b6c7acaa61c75a. 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/DEKL51809005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409db4047030cffebc5cd8039e22cc291d284dc9bc1c81668a3ce08c7b454b9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DELL41900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efc419138c77388abdc8cffcd4b5a2a826a4f60ae6a1526a86a393595f94aa6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DELL41900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409db4047030cffebc5cd8039e22cc291d284dc9bc1c81668a3ce08c7b454b9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DELL41900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eea28832cf0f99578983e6f96c0b7dc0062a35cc2c5b93d61b356a57bd2373. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DELL41900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c44b9705c1e31785714772e984a591d5fa448d70b6bc55886fc0b6d28857ca. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/DELL41900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc236659dfdaf718d6e6003b56146aff3f5bed268c3d08d8afebb16fc516e5f01. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELL41900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bcd6fb8a26e57df3d599733deaaf873b8ca821ee001a05c82a22bf8d3616b4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6MZ2446550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a441dbc8a3f5e9595a4bbee6cb7f778d83c2e7da642b36c89af960137b24bdc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6MZ2467840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e6cc62ebd7b3bcb4f47a8c35bec0754711ffde8bd607ea717f6dea0329375c. 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/QM6N22076304.