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 0x41c2483a9a1773b2766f92c57f6486360bcde868313fb58752cfbbabddb10d44. 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/bc4debca-06f4-4059-b58b-e4b58c2a0217.json and https://artists.proofprofile.net/proofs/artist/bc4debca-06f4-4059-b58b-e4b58c2a0217.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 0xf022282f3c3c098a74e98135060f08dd5af2f28545c1b5ac53d58858120d9b59. 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/JPB602308646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c346ebd7de19045f265fa5cb9d3d375e3ec0fed20d757f53e7c8f1ff273ff75. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCJPY2345616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132d528daf6c7f3bdb9a066f169f8b8d72c766271f5a53ed8840a4a3d475dbbb. 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/TCJPV2369753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad3ef5a90118ca6ba8be5777f19a1260e288e49339f27964cb20a253344e5b. 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/TCJPY2345619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5388ef322785ca303bbf93079805ca1c3d9765a4042a09585de18b94d35110. 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/TCJPW2385600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc406edb1e4dd02b95b7fa8601d951c5c5b9cc878bd4f407a1253f9a79431864a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:05:28Z), 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/TCJPY2345627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d9d628278068ab4f9d2e3cf58992bde1b18e4e74fabad227b04ccba112e36. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPY2311940.
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 0xa7fe3e17b185adda9a57ee69b15d3632739a5dfaefdac27e2d969d0fb8b234ce. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPY2345621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaf91c5d2030b3f8a33e65e7bcb7a5d097bbca34743668a71ed6a67394ada8c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JP92Q2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5e9dd5ca45f3b1bd6b6b81d17a38024d1bfa07d82a809b6de56a09a3b99b2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCJPW2333245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b217220c33757f257aa233af025e45250cd99fb3207de1710bbeb6bb1ff0d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCJPY2345626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618e4d5025bdac8f09beb9d765d551f726ced04a3424e930f1c6c271d5d7fcda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CALVP1904552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7b45b8e933ec4b9bedac92aa0310920e634885777417ec7532f078392be926. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CALVP1904548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e060fbb66b520e0c9a9eba6c6835908670965f176803f3137056aa4697f39. 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/JPB602402719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e94fddc889e98b3c866152eb32692e43bf2bbe6d10c39835195e59c0b14b02. 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/QZHNC2182148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5dbe46e9d79d5551ea1d8a22103916b20657c807f262f8a6df6fe48b210923. 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/CAHQJ1991691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c166d698a0b0db2179b0fb9a339a259a498962591551adc769b3a7ce9eca1. 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/CAHQJ2138008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc00028f87f1cd728b61aeca4c700b7b408f704cc4760c4d0723dc23cc550829. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPZ2423370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bb9fbcef788d7740ed49a7ee0db3af485116f210e57a17f79d99d6b470e930. 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/TCJPA2417563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f8e1a4750588a14941e99f18bd30c19ab8e83a90da42bc5b436231c52ef53. 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/CAHQJ2121609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44011d5fdccd4a5039cac5bae9ce511644c89a91526f439c7ad52d541aea5f02. 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/JP92Q2200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82a6b52fcac32f784df808e0bc43915a800e1c50733eb4d25c2292ef985947. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAHQJ2121615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56ba544f851bc60c18fcc0e41baea1bf05232149d7d92d21007a79687d698b7. 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/TCJPZ2498277.