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 0xd9d779d1167bbf47be7900cfdfc566075d43324ff02fcd28902fcc409db2ea45. 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/bf997d1a-edd3-470b-9f95-879f2f09f3fc.json and https://artists.proofprofile.net/proofs/artist/bf997d1a-edd3-470b-9f95-879f2f09f3fc.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 0xa72738f67e50dcbd879281b1fdabe6d4896c44e5d7f3453223cbb0ee90c312b3. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/DGA062308214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d7a76bb69cfbd2f80a60f170628c96e12a44a31c67c87bfb54f28715b3354. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA062308215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd299ba39852295f61cd7710546c75850113c1fbb3916a19255075e866d21a1. 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/DGA062308216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ced2636b0699626f2bd4b6a8a8ff7c7c26e4dbab76efe5cb11a8b00987c658e. 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/DGA062308217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fecf1b2d1424e045aaf5fceb939c91b0e4208671b11f5f9a1d0e209b347aa52. 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/DGA062308220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea93318b39ad3489a55013f9d351444b64f7be73a92112a229ee5fb3d4f934. 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/DGA062308222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7caeb152c425b68382853d4b0a905d3cbb1c20a692dee12eb1bef1deb6a406. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES92046571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc6f1b64d506bc9c2ee1a2d7ed50afd855f28c949372fa0c626948991c50b2. 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/QZES92046572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadff557d2c8e6f8da2ff183895eac616f488eedb6700e7249d09fe8468ec0578. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:31Z), 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/QZES92046573.