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 0xd69e6f0a0fdd822a2e7462bf1b9776c6bba2e96fbc789f015f89a8dffd8a5edd. 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/d2df400e-1110-4196-94e4-6f353958e5d0.json and https://artists.proofprofile.net/proofs/artist/d2df400e-1110-4196-94e4-6f353958e5d0.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 0x1d1c37d1323be081bb93e390554161eac8720efe6d97a8e0989c8c630ba187e2. 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/SE5Q51903292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceecb786f2de840be9aff73098973548fca61485215b982d7e99e6a706480d2d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:43Z), 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/SE5Q51903165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d19270fc5e948eb582794f92927e5efc6207552ce69b5504099318406fad2. 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/SE5Q51901867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaa74ab381dcfb690aa6518a2283192f6607256cfe0cd4fb013ec1c3fd9daf1. 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/SE5Q51901782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e9ca108f6c72aaca60b7b6e38ae1f615ab65ef8d8ad271a69a9f70c975ba5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE5Q51828544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fa3cdeea23a6b76eb5e53cdd995f773c61a585b82ca7333512144dce04128. 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/SE5Q51811845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6cb572849f76c0e972cb3c5a4ae9b239bd68da5ff79faff4b8b3acb6a21bd. 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/SE5Q51828524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21227c57e1a16633c847cd0f9a1f2a5d9c5f31f4b31c726ae8c280e7057fa0e4. 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/SE5Q51809824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64b4836eb398a182f1a722a6a34ecb8204d9cce64e015948bb0fa040fada18. 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/SE5Q51816678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cae8117bbd43b00c9abad583ab3a63440171f07d3685a1fc417df827110d53. 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/SE5Q51804975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda21fff59dcb825962e0d761414ac8d0a0427138989fca7568c3e42196ba169. 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/SE5Q51828521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa877f524f7e1822ca6e4ad9067cf557d17dd7ce4adcad4b98e70353d5bcac9f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QM4DW1867882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332798143f084f981bb478e35316b8409b8286b791369693f87162c79aba4599. 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/USANG2231707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066878432c102b6df2609f385c48cf2d825829563c5858de97ea62d37609df94. 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/NL1LE2202584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ada819058643708ebb23b2588205d92a097fec035f44cea48e5f0a19f5c86. 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/SE5Q52101782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc461cdea6367f3775e7f252789e75678a16ef1d7430cad000b8a536e47bb1e62. 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/SE5Q52003888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfbee42fc471f7539a4e6fd217295b28e6d60d92eea7350834306eb140fa9c7. 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/SE5Q52004095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e1b692fe6d97b35b858c88af4a3a1f502c9c7d6feb16f58f34745c37372c9. 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/SE5Q52002355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff9e6a94c7ce8897c1260de80819938f03f621b74244e1d6952bffc2b69be8a. 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/SE5Q52000853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afef71bc549ad1de3b0884cfae37264ec83cc49e5ddb97eae797f3b99b5f3e6. 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/SE5Q52000736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e980d1ee1952dcf6b347f2a20c10c3cb3745f4647cd5169dcc82169169fdc. 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/SE5Q52000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafefcf16dfe438c7a254d10f35c6bd068c22cc4925cbff54607d2b4fd0336a. 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/SE5Q52000529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed12d61670c4e21d865ffac5aa4f5b4cfa30ddca2ff1fdaf5a1c02149bae6c0. 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/SE5Q52000669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8c2497c910a54847e086c661a48cb2da00217ab86220c9a68c5ae1789a027. 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/SE5Q51900894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0502c2eb1d88473c4d978c84f8e08a938062ec8025de696f15dee53d50d3972. 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/SE5Q51900896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecd4069a7694102d93112e1d7c2e4c6907b52e7ec9a776e6bfb6741a8f6957. 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/SE5Q51901369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b849f7fe578dedd77f42847e8272920d0f41013b02d717164cc3dec583e210. 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/SE5Q51901368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3683bf66dc4c1e1f4b59a7988ba64e476a96cdd1a1185c537c53e532fcb6f114. 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/SE5Q51901355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e98870810f0f30aa0b6a0e8c886a1b24bfa95e85642e35c98618271046a637. 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/SE5Q51900986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006c60f64d0860bbb9a0a49afede19937f449f60ea02ed1384da22216352c61. 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/SE5Q51900836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825b96bb30dce9375be26466962f469687de80fa6ee432077a8c4ec3874666c. 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/SE5Q51900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1383398123b3e47dea79d5ed270da8b99be4df5e6c1367e55ac45dc52c695e. 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/SE5Q51900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397bceeb67c879cb118cbe59f6c1f34afa7c3c6dfa481ccff0344fae2558a911. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5Q51900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff996fd25949ca1e28cf8b0659d9f1544b9e1d9483b639cbf66dcc59713619aa. 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/SE5Q51827521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a770193928876e0fda9ad4fe5ff84e3677a2d5c5839dd25fdcba89210e85f. 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/SE5Q51828974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95bab1e87dfc974ad81d6e6639eed59080ef1d6cc66d4e38af0f463028f1075. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE5Q51827482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7843138ca4d771afa54a7b9fdabad3304b777338d5e591166e3ca63bf863e8b. 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/SE5Q51828970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaa1fc4f456f0cd4fe6925493f33f1e75822f8138abc550f6a22cde76b8ec25. 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/SE5Q51812907.