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 0xe79efd7d418b2f6a8b36619c8b47c3876a6aff3e7db8d4f6ba069486c1e3dd2b. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3b35675-7662-42e9-80a0-eac3dfbc2798.json and https://artists.proofprofile.net/proofs/artist/b3b35675-7662-42e9-80a0-eac3dfbc2798.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 0x5fbd816bc9bf1a0c5e5721364980c52c94e05b6b9e66090b6691a7966f19e063. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBKQU2348430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d50a5dc5dbc8d9aca6008fd3f346ca3d53c13490944d6aac3326286e6650c. 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/GBKQU2396175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dda09f5d835dfc8d2961dc7743cebd9e75daff94e9ea566ed44d8da8da61a1. 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/GBKQU2396176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3309d4a594f114b56b31a86176bd4af45d67e4ca53529e9724ac9c38fc39b058. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:43Z), 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/USA2P2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3309d4a594f114b56b31a86176bd4af45d67e4ca53529e9724ac9c38fc39b058. 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/USA2P2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d658975aa61ded2bb967dd1acc4bae8d3c195eb174582fb1c6d95dc8882792. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKQU2420863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c8297e18dccd9cd48199e4339ab164f7b64b1d6970f41afbe83b562d8560d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKQU2451374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33944e5e54c287fa6ffd8620cf8487d110a22ba467102cb64229ede534902f18. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USA2P2460311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33944e5e54c287fa6ffd8620cf8487d110a22ba467102cb64229ede534902f18. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USA2P2460311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9ed2c8b9d9c37f3026df0fafed469dc07d808c20ecce7d32d5ed969dad737d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/UKU932484010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ef583bee1b355c20411026b8bc51a69074db9a0bb7ee56149f7318d7ce1875. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBLV62419904.