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 0x43fa20065546eab0283e9e8a615b6419e58c6b2e443e54bff18e9b745d89aecf. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe952f4e-b55f-48da-b39c-7e2b4d8ea822.json and https://artists.proofprofile.net/proofs/artist/fe952f4e-b55f-48da-b39c-7e2b4d8ea822.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 0xf915f02f6b4890628317014b4f9598eef933c1ad2a5c7803428912978c556044. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:47Z), 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/TCAJS2504320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d393a04e11f2cecd9a7e4e3a571495eca8d6f9fc994ab7cd8d598dbce65cb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:55Z), 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/TCAJS2504370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba50b6dee9152064d4732e9bbf7db219707bf0e25629f9d2a464a07311103ef. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJS2509815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2ee953cd5869d1a2cf4aac8dbe82ad43176f111cd5d25a2621519380f4ed27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJS2509835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb536a33336349a1ee89139103a4999b2b670fd457f27fd7ed0b5321c598ecc9a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJT2509860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece37df9d6283b4ad07ec1ff39c034ca232c321ed8e48f09a974c0cd6dbf68a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:55:47Z), 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/TCAJS2509873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7506db87bd46e34aca53d64e2aec444d9b76a90f0fa722ef6c246c1a648f8069. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:08Z), 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/TCAJS2509889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a0902e1ab5b8ae7dde42c37ea6b7b5d6b06bc1af71599a454c813cdda9ba8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJS2509897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52557963f4daa0bb2e1601cb6bcb30710e0451d469ca63488b06807370511ef5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJS2509901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978549416cb22b0e595bd39589d4ac1276ced2b295284973d6319764c48908d9. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:21Z), 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/TCAJS2509912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c675bcf49c883c8a16f00c8e14504e8a7dfaa126877c44233cacf10119a1b8f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAJT2509914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fedb07c339722193429269e6c08d271664ca94b0049e69faa0c099092f0929. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:35:27Z), 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/TCAJT2509919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188a73b8e26cc39dc02a80f3e4388a53d20c6a5df6c971680d30d255731a43f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:52:42Z), 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/TCAJS2509925.