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 0x60732831c8ad13248f53b006959588be6afd1ae1b67b2bb86f3744dddf499a7d. 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/1c4b01ef-3b0a-4aaf-bff0-e788ab9c55b5.json and https://artists.proofprofile.net/proofs/artist/1c4b01ef-3b0a-4aaf-bff0-e788ab9c55b5.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 0x97fee4a26c46baaae816774e88ae95c7e5e7e9203f72a492effccb80a5c44911. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLS2224223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fee4a26c46baaae816774e88ae95c7e5e7e9203f72a492effccb80a5c44911. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZGLS2224223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c404b32df1c51448f426a49711d27dfe8f5ac6950338bbe0baad32308ac811a. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/USA2P2210243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c404b32df1c51448f426a49711d27dfe8f5ac6950338bbe0baad32308ac811a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USA2P2210243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1fe626cf81ca4774cb721aca7147d5421833face5e44d4968f3005d3bae0b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6N22338958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c715d616604fdb11cd3d7603556ece7433abd2a115e682f038441487d25c575. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QM6N22352115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635e7e8ca6626dd525d57f6690ec98b01d7ee8709f168b4ea7ffa2b4f918922. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:39Z), 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/QM6N22352120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1fe626cf81ca4774cb721aca7147d5421833face5e44d4968f3005d3bae0b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6N22338958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c715d616604fdb11cd3d7603556ece7433abd2a115e682f038441487d25c575. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM6N22352115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635e7e8ca6626dd525d57f6690ec98b01d7ee8709f168b4ea7ffa2b4f918922. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6N22352120.