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 0x52153d9575372d92c534e65459ace4a8ba795ae803aa8247651c60e9d4091c1f. 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/67f2d970-5cc6-4015-b12e-e8c8cf7f43bb.json and https://artists.proofprofile.net/proofs/artist/67f2d970-5cc6-4015-b12e-e8c8cf7f43bb.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 0x5f0d7428166de45427a718311406a908399f9efe6c4acf7de14f4bf2bbaf0488. 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/KRA382319932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff34b1ad468410db9ad4659b273ccbe9d8861857fd6b1dce14bc4623ae6bbfa. 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/KRA382302694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a4ea913361ba9eb01868d85f56c7f4b581c7eb80b04e261c37fe690537b6d. 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/KRA382300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f946a42c4921c87a785e5d30644a63e36170d00a6f03eda45964e3e2e6a1f25. 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/KRA382205274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed6ffc51d2096a600201b2946afcb7a75a68939a6006933e707ac11441e765. 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/KRA382203850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc929124df521371dd51d3b0ccd308c31f2e3f8ae61cad38eaa4ce78fa35b9509. 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/KRA382203851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6b230c4991e3a93cf895e6266b12f2d86d97ea74748150758c6082b0b982f. 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/KRA382203852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b84033d4b3bdc3ee469c9abc279c63840fb717f7b100300aa2dc355e54144de. 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/KRA382203853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593071b086d81c5bacb3121f41ce649eedfbf582265a3fce23dfa748173d67fa. 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/KRA382203854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694cf5d5a49cfaec09a3312864af4213dbcf2e6b33b705549586f7c0e4e46150. 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/KRA382160088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e03784b8a6d51eed4555713d45d2dd972ad526007dd4ddc75bbde96a668bd. 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/KRA382160089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77f3ff9b256c988af6779345088af877caefc627551f110653dcfa9e50259f4. 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/GX4R52126995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cda286c84a37dcf340e8ca8a7308eb42a267bbafde2a2136c0c16362b3b4f7. 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/KRA382152276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ea5dc46b27bd9b95583731a905e883d94145c33fb28f596bc51b10eea40f10. 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/KRA382152277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb3df8588b2347f06ee476de224f1dd031d14e49c3d160b5895382fa6d63218. 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/KRA382152278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc0fede6ddfd3d43d7bb142737c3e30fb4f5277a8dbc2cddda01b8a420948e. 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/KRA382152279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8617799d7b91a3d244ac31894d2bee2ffa549e3eb87ec91deb7bbc64c797380. 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/KRA382152280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6808ae13ac54680e5f510c92cc24f6894827be8ff4430360586c0e369a67574. 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/KRA382003394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9c72504ac5c54adf5004ac8f86665282f080f4cbf9d7734dc9ec433665d364. 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/KRA381800466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d7d0cb90517f262af88b30902c9b6974664e119de4ccbde1ed00df71f61538. 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/KRB921940113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55412473082ae24fb0d542106c718fad9247a8355c062e1c95b8a3dd6eaa2c72. 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/KRB921940114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b36bf1d1b58e7e44bad613dc838a34b5439295e4e5f47272f9ac1cbcd4d07. 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/KRB921940115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f26222682a8913ebf9039ae1d6d31895082a725527cc18ef1f97dc77a75945. 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/KRB921940116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea842fc3211ac8bc4ae2a4c593686ee0c5548da8399bce114911e2acd5d0f6. 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/KRB921940117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9680d603eb2d1f0d57e101521e5464c9665667494db4b51cc5cfd40fbb379bc5. 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/KRB921940118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9eee6fda492f48ba7d0928b4e67de310951151d6317a1fd1dcdf5b49ed02f2. 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/KRB921940108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e8373f476e72957ee7b51e765beaa57205c511f56391215e126038a1a8716. 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/KRB921940109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ae779ec9c271167ad9dddcf031bcce1ba99a1ff74e062674681c84d9847ec3. 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/KRB921940110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f940749dff0ccdd3bd97ce3854e32c5c9a47fc1a42e036f32eff78fe731e5a. 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/KRB921940111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d5af24a069c98810f1d33b06a6eeafbfe8c90751feae0a40b0b5743ea7a94. 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/KRC941690000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77165cb93977d8ae99cdfa9f441f62c7d0dd22ffc92b7a9d3e3074afda565815. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/KRB921940284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c650225cc7b3c71858e4e04beadc1c48c4df5e33a3772dd2cd50b37d24548. 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/KRB921940246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3826685336e0d401e1176fec873000c036bbbca6e5555f7a6794add672ce2e2d. 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/KRB921940234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44470e9331baea9c42930b30cacb6e1bb3df7061ede4462bc709ab502c495be. 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/KRB921940235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f5ed7950eaffa043ffa92720fb672228084d5b5a72561e899045f8ad1d08bb. 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/KRB921940231.