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 0x0e6a8db1840596266a6eeea34c4badc19967dd953c0b868503fcba2ab9a1ae97. 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/8d4def5a-7adb-4aa1-98ec-35130f44f0c2.json and https://artists.proofprofile.net/proofs/artist/8d4def5a-7adb-4aa1-98ec-35130f44f0c2.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 0x570f4f91a801935648b8c2985f11c3ff23d23c28b749f6112f879ad0c6faaa31. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ5AB2358781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4b1137b8effed8783144aebb5e96fbfc5e804a8824fab1e087db609e2cfe2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5AB2358783.
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 0x915559d3548a0df4cfc927151dcb702119195baec88e8b4946ddbe711867537b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXLT92400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de2199b6ddedab2e34ef350edd4c83813d834cdd487d40f2869548124bc4ab. 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/BXLT92400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f47f3b22e56509a32dcd5698dca67d0c31db92640f1064863309634b7155a. 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/BXLT92400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78686449a80fec3d97d5fe597c061fa1a4a89f1d894c71b9f883ff470470d1fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXLT92400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2178e329900603c38dfa66424ed5f723742edf89ac9eace0f7679a08b45a21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXLT92400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4021a009b730f746bdced787822eed6c7b3bca6e7a238c4173a187c86865d27. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXLT92400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e01db3ee914c9615bcfab40c69c3a461abdeb91a4860a20e8f681e44e4d3e5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXLT92400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd29ede003d9d20db508129e6cd4c152acfce62abcf320f9d48d53ad2f82b93. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXLT92400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d49b11d81cd1202cce7f7494e324770711e7504895770998225d6e3e5024eb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXLT92400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c8aec0a6b0af74676662bacac9308300b86974e8368e41e9cbc5097041a5fe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXLT92400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8802a40f4c8d661145a69992cd88c7fdd0e628e7623552d2b745af2ee59b62. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXLT92400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692218bfbb64707d6d8f934967e0ce7e39751de6d9555b3f86bf271006a44fad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BXLT92500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0431e17c16effcb6dac66da1d021b7c890b0ffe819dd9bc6ec663549f1994e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXFGZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75609ffedd4dd5ee1683f932b5dd7694a363767cc44c701e4ece51a05bc6e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR9UW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b5e90c75bbf709d3bab6a4d6c58911e8fc990608579f3e1d89de2ee24ef846. 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/BKT7N2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc208dff8049353662d7714ad8ba013653e7266d3ae72f283d8d0bd88c561b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKT7N2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308849ce84ec19f5588f4738eb8722f964da57f71098f1739360644e87012e2. 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/BKT7N2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca51b8ffba90a92b092b4ead2cc4805410158d22363e0561dff53b1f6dce1b. 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/BKT7N2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ea8b17384b3fe90f53b7608fd95b054f1b1be5f7cdcadd2116b27eeeba182. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BKT7N2400008.