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 0x722e5b0e89cf01713f596a1b72e4b0590c5a726eff71153477895213adc718e1. 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/d89a55a7-0721-4d3d-8a06-2ef2f89a4581.json and https://artists.proofprofile.net/proofs/artist/d89a55a7-0721-4d3d-8a06-2ef2f89a4581.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 0xf28a789664aedc9c96f723a3a66a6ca71d0036fbd717807d6f5e6b26ff8f2df5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2525780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e02b326a7f37105a33f66d7061cb331ce0777c1c7ac0fcbf049a024f12296c3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNWT2525781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae4d41f2b65c9d5f6003d4e9a7ea76d82b168817dcd24ff369a72e302ad075. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2525782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe008f63f016a0988ef217c0d95673f6093044d8c3342ed5de62a43496aadcaac. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWT2525783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373d7dcf2dca1c1115d5a2ed2bdf561844d39d91f919ac5dab1c25fe12d45bcd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2525784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36680fa4406afa26e6861d7a16b1f2017907199e66d972d9c9b715c7b277cf6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2525785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b5f0246bb1965f40b86ab1fa33c3a8d18c158ae2e196a5357e48efb813eb7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2525786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866c367613da1c925252beb62655f54cf843cdbc35b3c872f896f3d26ad41c9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWT2525787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b17dbd2b728fac7a6ac1d40e779880f70fb077b02176ad2c61be3260b3ece. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNWT2525788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2b22c16dcf12f7b054ad93ea7869713bd4bee9074796a5121f6dc4de4686a. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZNWT2525789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf129ed49fd2a12b8f37262c6ee5fea5d4faf06eee9679f2598298e37bf1dfe. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWT2525790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa21acc620f5fb7cf00f53854365f33ca55dba3875cba2800bf0614addb96dc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWT2525791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeafcce143aab22470b69f76164ef6d49640891777f0ee9fde09c9d27446b2ca. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWT2525792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3b90366b88e3e68219468232661a2dc121338272861e0777a9facd535298b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWT2525794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eef9e1e23238d32b8c09f8b0e16dc67c3fb8f746355244bb98f7978f9acf0ed. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2525795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec003ec695fb60b27f4ececd9d52c6edd1b907720aa4b374fb59b592c113af. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWT2525796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d54cd4af4e60adc383cdc19cbcab1650bff8190536b08f869ddc09b9526d875. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2525797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9f63529891a6b87d73563301d2dc506cc1c3733d3d776da5fbe47d7272c06. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2525798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112568d4966d6e6e2692de215cc2063278e2ac7d2bb31a93585262498284e8b9. 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/QZNWT2525799.