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 0x1bca8f1efce0afba5bafcec7d35ddc735459d9238c27bb2364717c88ce3f71da. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/302f7959-c58c-48e3-baba-e75a8c85dae3.json and https://artists.proofprofile.net/proofs/artist/302f7959-c58c-48e3-baba-e75a8c85dae3.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 0x0ae65ffcc21bdd75a594cb2f2ffbe3e900de28872c9a6fb1e519189103d5459a. 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/TCAHD2339982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e60890b1da95911e329d306489308407aa9ec034d06b163991c60320c9de697. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHF2351608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d4dd954293f0f7bb6834a1d0171c215f67d7905242f336947dde1f8a7b0d77. 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/TCAHR2358840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe048e2204713cae6b84a724e3995124ff868700026f5d5741a73d687bfa0290e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIG2451766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0d15072f480d59f4dfbef7032da75816f51bfe8582b98373a5b482fbc43c5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAIJ2432785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373cac9419cba5ef3919fb68dd46c05cf3e82a5fe9824e3a7301462bc938cd6. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAIJ2482366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6542536930062688a1bc9fe378cab1ef0e3c32bb8d6d71af1e0dc90e4665a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:20Z), 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/TCAIK2482551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05963f232904bb39165ad09bb2c3b483f3f63257e1dcf703be1b1571f1f71381. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIS2410233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a412584da704ee4f7e24d7858c7cb9291259e7ace2f2f22deb1d69ef69e5501. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIU2490031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9337ad69539f695d765c5258cbcdc74ed0549b2f34bdb4faa34d120b477eb92d. 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/TCAIZ2422508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456a7f884fc68dfa2d49f9a219c07b11f9ba81669c76504ace85045b6d66a799. 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/TCAJA2478877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766dcf269d218b904a9e7509535da79d5921baf39612c16c9172db5e04c0643b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:51Z), 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/TCAJG2579967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591773af3226137c1719d873a1717afdec5c17bdce4a259ca49ad249ccc15a0. 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/TCAJI2511327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521577dac07680ab63ca3c61135fdf746f2d6765bceeca530691ca4ed40d0b4a. 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/TCAJK2560642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af0f2f1a51be7c8d2e20a4b0fbf4a7aa866cd192749c2d9c0c0aecbff499a2. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJP2578605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda05916fc2e3af688de4d6de17aa9c8c2ce9692f529a44a64ae7f112461dedec. 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/TCAJT2544786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a2d6530f675714e597b87c6fdb81785c3ee99ee7df7749cc91da1f3bd66d0f. 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/TCAJV2572327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69949017f3411a4cb4ab67b673255dcb3897e46e738f15331dd1c8ed8339ff4. 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/TCAJZ2546894.