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 0x344773f722e6c976bc6ec5d33d1ab136249ad4c91fe8ad3d9470724df8dee32d. 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/e50729b7-6a0e-4e62-8589-a7e3d98938ba.json and https://artists.proofprofile.net/proofs/artist/e50729b7-6a0e-4e62-8589-a7e3d98938ba.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 0x6303e8c186a776b227e34a8514da35ba553024c7f62c1007c8951132ee6a7f3c. 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/AEA0Q1830136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e9fe9d1bc34e117b1d57706bc6a5ba2cf0f5d3a34db06cc8a76d2142e9f5e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AEA0Q1829822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ba683abef70fc6e78a271a6204132dda37f97fdd77f3184849e15bd57a62c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:07:51Z), 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/AEA0Q1829125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed248c54a7c3207143bf70190a399160c972b85ec5d683b562fb8c2d16a453d9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0Q1829133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83322fec2bcaa2613d3d9d96a25bac2b8ab0e3fd0a84e548bc0d4bfe23ead28. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:31:04Z), 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/AEA0Q1827110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c44fcc9cdb6abbcc942ca201a059e867adb099bbfd74b71cb092b2f39cac8. 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/AEA0Q1827112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eebbffe5a1d98276e954bba8ca7d335349ded70e6507668893a2b2630d437aa. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AEA0Q1827113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6930db0dda24293bc86866a6feb8d4ac8d3916a6b113f71607802e19e100d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:32Z), 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/AEA0Q1827115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caca4c2bb951eb56025046a3b38f1623a2fd5c5338bb58de0fd2568af8538d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:17Z), 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/AEA0Q1827117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d04c4b876222528b79e8fbd79c1ebeebe295b1c81d20fe444da296de25133. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/AEA0Q1827118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65385f62ad649f9f53faf7086c335819dfbf6ffd44cea2fb1b8fcaacbd07214. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA0Q1969873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47558e89d11efb8044681e663ce0a3e3b117a77b803313af2b2d68a99ea85e7a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AEA0Q2034305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f549777707c8cef0b69a91fe8f98ac96949fa13b3cdd3188efe40e22829d1a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0D2065411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302c5edd55f78a7284b9d992bf1dc42029520a540ed7f6265917da332eeb5e4. 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/AEA2M2290164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e710a43c8ef575349dc2a00447643228a77e3e143625c88cf74dfaacada6f51. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/AEA2W2353279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f491bb190bff599882be1a095e89671f16f38d9a809a24501e1573c672387. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/AEA2M2330089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fbc8aed62fcf4a1a86b9786b3be745754da9ecda36d7bb6a706fb778d0576. 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/RUA1H2460499.