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 0x849977f644f204441fb27f8f9de60973cc889cf0c1f153dbbcb3ad1539a47762. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dca088db-896d-4a90-b8eb-ca0584fa06b3.json and https://artists.proofprofile.net/proofs/artist/dca088db-896d-4a90-b8eb-ca0584fa06b3.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 0x6fc09715f7ae9ab298cba37c20d725c0701afa49f0142d2f9f52b44d07ac5e43. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR7U62000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa20186ef4081ace12af64237fcf657280e831ff93319e7c0162c0b9f94d0e. 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/FR7U62100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc5d7b9184205ade423ae7855b1190bcbd63fc942ede4f374eb8322b3bcced. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:58:02Z), 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/FR7U62100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ca24776c6b42422932a79418855dc3ee8879eb96787917e4037fd4330a822. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:26Z), 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/FR7U62100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff508d5ee84fe9340c987b44d167691b0c9a4a9bd9f1430c18c910907e014e65. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:41:52Z), 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/FR7U62100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab4b3790bd697da4034e29dbb97b0cf42f4dcef8c1ef8a61cb6cea0f98f15ba. 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/FR7U62100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96cf441d83489fc47412a55667d05a69f979972396fa0c2452803ff264a2441. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR7U62100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629f89481854a602881ddf2e30fd783766acaf257e5d8b32da37637ae254d59. 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/FR7U62100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bdb52f995f7625b300add9700c5e21c9e7e0542e99f34a252ac3dc678a0612. 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/FR7U62100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc09715f7ae9ab298cba37c20d725c0701afa49f0142d2f9f52b44d07ac5e43. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR7U62000037.