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 0xf6cbb6e6fedfd4ede5275eb8fc5779b57380a6b6e8db5e2d14996a96dbc34834. 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/454e737b-aee7-45a1-a12e-04374cc495d5.json and https://artists.proofprofile.net/proofs/artist/454e737b-aee7-45a1-a12e-04374cc495d5.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 0xd46167eec5fdb67e31dcaa56f2213be4f1b5f5f823f510165f8517e77b63ff7f. 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/DEPI82308537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a9a819724e42fe8441cba61e09f078cad3d7463ea323dedfd8d8ecea14b179. 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/DEPI82308538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34163d6159c61d467537d246438d733eae844e2f122798ab091418ad6e587773. 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/DEPI82308539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72740573dbfdb4b1c4dc58b423e7f5374537abf7f8faafe1c49c6808fb3eafd7. 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/DEPI82308540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb20fc20a791b8359cc4204b51ba690feb46ce5941b6dcaed9ec0b2d3c0d8f6. 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/DEPI82308541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38607ba066d8938ce95ff7ca77952dcba1f06d9b298a6ccfa6974efc34d12a5. 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/USA2P2033390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078cfeaf673965cebba09185f97c8bfe081738b9a58ef2db258f1b59c8929ea1. 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/USA2P2033391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61afe0be9f41d67aeefcdf194985b1532db19e7865ccc8ca0fe0ba825847672f. 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/USA2P2033392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00680a83509140409490f0ce47aafea54d8c1b16be554bb59a4a538f05d63109. 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/USA2P2033393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab933c8fa1d2f0095335544dc029928defff3484a989918e48cabaf81e9b91d2. 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/USA2P2033394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d807a93a8b3e2a73de872b229d956ad48f5cff6ce16cde6594b25352bca9034. 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/USA2P2033395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7904cd89040de8818e52e5f0f03b547979fbd79bd62064e781a7497838c82ca0. 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/USA2P1820879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb684128eb1ad0b6d9b7917d6aff6c3f68ffb00da2244f45c7d7c4caf1fdf9bb4. 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/USA2P1820880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694cfebfc11e192b79bb4a1c9dc214a03d47b6e029bda7b93e26cf91fb130b1e. 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/USA2P1820881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7293f9c2391eb2b2c06347c7087b1b45ce25f16d5d2c9bf463dd284d7138aa3. 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/USA2P1820882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a503770ff143e970af198871acb91b87f396678cebefeac1a10db0e5b71aed. 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/USA2P1820883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114a3a48c7bb9fa1ca56c4f216411c39c20b61e0c48b6ea29b34878107dce311. 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/USA2P1820884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf2681f3d039263be70d51260c5fcbd1e62d164d6e0cea686ad3413214ac55f. 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/USA2P1820885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce60e19b8c322e92613cff650f4e1afadfc43984aacf356e02d2b59d3afd3cf. 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/USA2P1634625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9bbe84c8e5f0ae979f86c78abc38b5da73a49ac8c534bf9bfff15e484c8308. 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/USA2P1634626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69ac94b64ea006dc0d80d22ad76fabf5c0fce7da4ce8e9f0da1e9759ac4ee51. 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/USA2P1634627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43dc8dab6ea9b16f17b3d4a92aa9275c2cbc6776d03ccf30b5f8a5386dcac9. 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/USA2P1634628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff06d04bd3318ca93e4140ba6bf51301b7df4090c507dd59721bb2f83daf26. 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/USA2P1634629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34163d6159c61d467537d246438d733eae844e2f122798ab091418ad6e587773. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEPI82308539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72740573dbfdb4b1c4dc58b423e7f5374537abf7f8faafe1c49c6808fb3eafd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82308540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72740573dbfdb4b1c4dc58b423e7f5374537abf7f8faafe1c49c6808fb3eafd7. 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/DEPI82308540.