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 0x9ed7dde53cfa9448fde8dffa346cd3ce0ec21f6baf36c1ec8f08a254ec965e79. 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/2135f324-83ba-4e07-bbdf-35d0dd583bb4.json and https://artists.proofprofile.net/proofs/artist/2135f324-83ba-4e07-bbdf-35d0dd583bb4.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 0x53578e13124a487646381e01ced622734ddaf3857c58ffe3bacc9fec606e24ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES40B2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff987c8acb3ca4845a6d6ca0d0b158ce9501c45ff10195501a19107a38cfa64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES40B2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab6868efbd62df40dd420e8a578d711ba6377e47cea593acd54d1e45b70c5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df61d2c25d50065a8a7dc18cd9654d5dd50bf457a09de4381ac4ec5806be911. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c942e3063bb1e282dd12035d39f9febdf167d490b2cb2429b7ac534c9759a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES40B2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf54af3f66987002dbc2804235ef641e4ee3957be2ada494947f4f3ac546cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d88b572f805051504737bc29dafea6b19ecedbe00851a7e91f9c008072eb5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES40B2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1b44111cddf395794a840e7a5bb4423966f39845d9be8c36759db8c4c6bfce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd25eec7292616ec27ba7bb0e64d5f490f4cdad129b54a078c1a0acd9bae298. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES40B2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae777188e4e8e94c129bbdc9a9c96923b0df2b529981822e57328d3bdfa8d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e5623f043b514302f5985b2378996e0384c01f87980bf5d01bda0177f90272. 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/ES40B2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92bcc40839b9289d4efa7a6142d2f4d9826aa45cd5e4c242f0f3e39c5cdbb4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES40B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef91dcfa82c593f96158655a6305dc4e73d091a9a3dac08fa8068b6aaddcb04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885168fabca487a95e2e7e89da506fa79069e7dd682429261e00a998408b86e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02308c8eda414d8fcf10f4c5555ac84e2b74b566998203d4143e88334de4d2ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3262b1f83630e71aacf839986450592516f540ce6ce2cee073dc05c57bf5d3e. 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/ES40B2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e9d5e00d40154876fd67ed035a7e2c7b90d9763dc939b4753c964b1595fd37. 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/ES40B2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d88b572f805051504737bc29dafea6b19ecedbe00851a7e91f9c008072eb5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42642afc9efb086e021e10c7694a3168f2fef4ad6819f33417db9cc13fc69f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES40B2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92bcc40839b9289d4efa7a6142d2f4d9826aa45cd5e4c242f0f3e39c5cdbb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2038b7dd5bcca2ac0167a6c16d955a844d150f5c479324de3296c155f6eeb0ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES40B2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb359ea90180c8e589e81ea805b9b7f52ca5a688c3728a56b8d2312af569375e1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2367343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b94e7ef4a71f2cff32bbba0823e397f974a0d7e93a8a58c3d28d08ebf6855c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2319243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f98ef2121ccb1aac9f3ef7ea6e45cf38e25788a6c1701b324852e0976bdadd4. 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/QM4TX2367344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a32614d563a14aa8d9ad05fb54931aa780a675518872b249607bad14b83e41. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2367347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baecbf1da162e0d3477aef0f1a472b10ccc0279d8903e7ed21d067b89f11ab4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2367348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb295c8f349291db16c1735c4e9f2a08853585a307e224c7ef23ed3718386e9d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2367349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce8b40eef0de4986b94651ace01f28f69f56c04e9193033585bbdde079cfdf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2367350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc008f076d32b5cddafc8b2fdda901c9ce509eb784c3176d33d7418035cc1b7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES40B2300055.