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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19e639844104da3bca2a6e69d673bf20db2c1f850ca140d98a8fff48450de4f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41459c48-2453-472e-ab67-7f6731277dab.json and https://artists.proofprofile.net/proofs/artist/41459c48-2453-472e-ab67-7f6731277dab.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796a58ee3a7e6369daef92201f7ef85207651861a52f98f9bdb39cd137098057. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEBL60684338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b885e470ba56e9dd565871dda4a1f45f191328cea3d63cec0ed50ba8b40963. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEBL60684341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6857aca0b55cd29adfe2cee214ba5270d4f8ef5d3323c9cfb22967e0f3ee849. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEBL60684344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a11792abefce06638191f809a766088a93b5ff869c644d0d977be5fed46d385. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEBL60684346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94d70d0ce4529dc41873afe54ebc634d24e73097051d8b27e3bb16746d19c9d. 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/DEBL60684354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174d93ebb09433cd9a3ea38de58f5e4663d0959f2c31e6622b1b40d3d440db7d. 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/DELJ81351212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e1edc8abf8cfdfd25dbcce5b2893aef1adc7c5f51fec6c489024669e123e2. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DEBL60474771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49e210464df63b961b8227a2d1e6f2b7fdbcc011e892117c647c23c33655dd. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/DEBL60474772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3204b34ca03fdf9865a90fd11c3fe24b627cc7e8061d04ba6c0424fb55c5d2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEBL60474774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9f6d205c62902102c790f5483912164c1248fd291aa6ac322c94f3655e3fde. 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/DEBL60474788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f64a8febac52579d09fa1c2dafa856ecd7d6e7cce2fa6c9bf3ed894487f2fa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEBL60474781.
Zilet: Audio Digital Rasur (Bonus Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77157fea3fc0534854fed15344f24123ac40e6557e3ab49471c69511a5ae36. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DEPI81500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22512f7d00672e0cf1f6d67bc5a6ce1a2e1a22abc3533a6167d9c9d5de39f7ea. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEPI81500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d07f7f74d9ad0e63afb60e7ed7a83e7b3b836784ed588f4dbd7deb07ab6540. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEPI81500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d809d1ddce4aab7a7f8b0c123ad7db1a745ea58ce7e6d91f2bcaacf2fc01e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DENL81607551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ce545d4738735c32b51556b60b61556dffd9a22cd99273ee89690d9bb73ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH7811821227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5460ae1245bfa56a2e39c657a92a29b4a7ad76a89114c4ce9e468056c9fd38. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEVY82000496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a07ee11f7d100ac604b2f5200b70f35bb3d5f4af6a76a894c43b8e8ea0cc0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812547165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed0b2287cd961cac17c4c7a24057decf7a4421d1983d8a22edba1a3d62e220a. 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/CH7812550420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe5cfab2308d9453b54a14eff97f3a8fa5c940c3089547d5cf76def2ac913a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEDL81300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10598c31cf3c7b2d64a17987e2e6e82ef75d6e0ee585be114c9fdbd5e2c22a6d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL61300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aff173a1ac2f7328953e9744285ddb012694456f3f54ffc01c4cb493abcb1b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DELJ81593329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f964d32a22c39b5f32435bcea4bae542a0aaee092d4379013773cc0527ccc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812416557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094653adaaad88ea4a612481d71ad16f5fd4c3146530a3cf7aab9598045851f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEBL61300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd280d987b27e5138541845fa46ab514348d1f4284512e76901ce874af97c69. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEZC62495886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1704913e5e9ec2650c4a8271eb01bf8360b53b065c6d8fe7bb1df6b673ebabd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEBL60210983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d5878582d06989d2cefb4e982a5f82e0f408b1ce433554f8dc8bcdfc255b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e1a9d089dfa2776c20785c8b94d562ef676053b09df4c57dcf101cf3e5414. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22100231.