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 0x568db714c94d010ae7460a1bd288d05d35a595ca239c95a466876059a68aa964. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3a612a3-1b50-4432-9c44-033bf68b9cae.json and https://artists.proofprofile.net/proofs/artist/d3a612a3-1b50-4432-9c44-033bf68b9cae.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 0x962a7b358af2165fa52236822f60869485c2494fbb98ea420990f457796564ff. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM4TX2161726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5469d7909fa17a7eeaabcef0a45cd2cd3a3f52c06c1316276be5c34cadc3d71e. 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/QM4TX2161727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cfe4c1a58f9e8daae76576ed813e67a432446ee1b8c4eee6c36619a668c03a. 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/QM4TX2161729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb854453c58b070a8526bd6e5b2e377cd0762da7e274043edb3001b69d620c040. 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/QM4TX2161730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db9777545ff8a7aa02e05ef9a656b5ba00d9f42020d4d4b0a51acfe255ae38. 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/QM4TX2161731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab882ea39ac81630b4d5bfb973efeb4415950a2bc967b8c90906af0ca34852d. 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/QM4TX2161733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578be30edabaaa07be3b7653970aa20b7d4fa1d5beae53e8133cd4a23be4550c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QM4TX2161734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ac878e0d24fea896735f6981e2af06128caf486c441acd42053ff150f67d19. 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/QM4TX2161735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8614235f8d5828306505960f4be86ea06b428f79c8cb2e480d84dfe26a8410ae. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:31:53Z), 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/QM4TX2161736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5bdbc788d62b1ad1ee044a8838271b553c233b5a7e80fe0f82f03a1a42395c. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QM4TX2161737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d6fc7d5d7a6a20da2f383050927c7692891fea8f2a32d446a8d5ee8036a60. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM4TX2161738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa870f8aed7fc446edd992690bae1b2dcdc699dfb32b418bf2cb135faba867aa. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM4TX2161739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddaaa36e2c60602c3e98770ff51f1d2519736ab0a05a329c0293eea470d180e. 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/QM4TX2161740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debca66509bdb1dd21cda541f001bd938f602133233f3aa3cfd9ccf9f77c65b. 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/QM4TX2161741.