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 0xdabf876fbbd4654eaa9710b92f409e7e93766b5e7b38d77bb29882a0555a1a0c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8f0cdc2-ce27-4c76-adb9-eecdde181faa.json and https://artists.proofprofile.net/proofs/artist/a8f0cdc2-ce27-4c76-adb9-eecdde181faa.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 0x24673f1587cc43cadb0c64594e728a8a8336a0dbef1aec6404be95ad7ebb102b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DK2MA1901521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598861989fb2fff6337bb111ab53187fd2cd1dc0e55307a40676ab9afdb13464. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:50Z), 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/DK2MA1901409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62063b2b4574ad98bd1d3e839b7536c396ba536c40b75726d650b1ed7ba0010. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:54Z), 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/DK2MA1901414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df1e678f8eac9b03b6fc5699489c04103986f9c8ac9d7daace9e800d32e81e. 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/DK2MA1901415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015508aea01c7bbdb46165d0a80c6737cb9d25b5e45107f1324d000db3a0655f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:17Z), 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/DK2MA1901609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4917a341e6bc405bbbbe46ab80d036724256cc49ac0588d4a2ba754a56cc902. 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/DK2MA1901610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76622d1140e9e13d5cf1ee3790cc0596c1abf4b9bef2648c646d3ad47dd48d3d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DK2MA1901613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa660816eeca26c3050ff7f66cd528f54e42115afe8d834762902e3440e5dc8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DK2MA1901615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68979b6fca8cf74d66de6df5cdab6e9b23dead21f4ab21204244c79a8575ccb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DK1MA2101505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68979b6fca8cf74d66de6df5cdab6e9b23dead21f4ab21204244c79a8575ccb. 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/DK1MA2101505.