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 0x394efb99e9d5df2146cbcd9e461b3a6fbcdd67757d7a9e689b427abb6f3fb064. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f775a76-df6a-4d96-a69f-6c753646edde.json and https://artists.proofprofile.net/proofs/artist/0f775a76-df6a-4d96-a69f-6c753646edde.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 0x3681ae7dbe24f1b64b844c3dae046f99975e47f7eaa0d31e93a59534d19eb25f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES71G2144407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a52c14b83f2715a539a0e073973b73ee05d48dbaff1c790b7ce924e0517a811. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ES71G2144408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acba0509ab63774b1f347533017633ed2e9b6043d727bb6c1bcf24848efd8b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2144409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4773e3031c2afae7eae3bf5478a1e7e8a4e5d6eefaf81bdd24b3f59254f90ad6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G2144410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31620c6f62e92549b32ea1a7190745a798a4ccec076625e9e69be1d9db88a850. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2144411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05fa6ae5278037ced3419925676c8022b5e45760a9fc87e89ea4f1dec1d604e. 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/ES71G2220851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a02e1208528696f0ed4e8c2b53cfc87097ce5047bfffefe5a5d4f736c1cd5f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2308762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d22430d63cd1ff33b4e1272505e49dcf8c6fd2ce2affd148dc4ed21ce4a7c5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES71G2232287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d557bb5962fb26bf6f67afbcdd618af62f3c900aea9144615dce49839d83b6a. 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/ES71G2232288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f053fab97e8c77f78faed34162a97a7479ef070ca45dcb4955e9b158e794b63. 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/ES71G2232289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9084cff3791a9f1d1538c777ce8b03492ac1402019563ff6b03617dae88d2c9b. 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/ES71G2233915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d220e586e3665dfd1da0d438f6158f3cf543b425b853e367c5dd4c2ab3b229d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G2233917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337e3fd5855c3ff28e29b27efb9c99fb53335465d5e0894ab40f81b648660032. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2233918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d0b52b4ae040ba02ada6ade6aaadc55f62b70f1490627fb7d32c8829e8c99. 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/ES71G2233895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f8178bdb43d43e2039da251dd62d7f413cf4beef4006a21272fa2ad2efdbfc. 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/ES71G2232278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c0f5620109528a78350b76af914b928ed2d426443d3c463077f495e6d0115. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2232279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f742edefe563885e7dc41c7adfc010161a1dd1eeb03119670c7f4d9138643b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:01Z), 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/ES71G2232286.
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 0xd835a34fd919c048af54b90d80cfffb46c007dba01b2bd5dcedc7b00ad3c5219. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:57Z), 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/ES71G2233916.
Canciones de Cuna Latinoamericanas, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5b99ae77c4c6e16d1b2c8aef772c26854e13f38b4d1fd30e05103b27a27700. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES71G2410473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d246e8167cd6e08cbd00c43ced1665198c8fc98d3c4eb07f4e4c4ad4201147. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES71G2410474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf1fcb461b99248684ba166d9453812d3646f858fb3a946b13ff69b4268f00. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES71G2410467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3103a17272695a061c2d30f409c6704bd17668585fad4f6ee657e679f3a026. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES71G2410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a42c2cb65127f5781800116f5e9998285a551db6316a051d44fe5424137e57. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES71G2410478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57074b16ce3955c1e6048b00060850f4b51ada574864934cc9fdafdd91c0c3a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G2410472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a232b69250b07c8bfd2cb8a738461840490dce2ef65d9c28bf498c308a4a7f6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES71G2410470.