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 0xbc7d84afaa32ee4c2a97ac040511827ce6cc2d165fdf00fb251a143dc9795741. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99ea8a3f-c794-4cc6-a0fd-5f903f9a57b5.json and https://artists.proofprofile.net/proofs/artist/99ea8a3f-c794-4cc6-a0fd-5f903f9a57b5.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 0x6d210f892e54423ec19a759400bdc7dd6d9f4244cbc6a49baf93221b4529b7bc. 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/TCAHP2352239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ded1b93e8d4b1dffafc0f36e23d5121857589e7488f94c427d41faac2ec9f6. 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/TCAHP2352243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63d0586cc7bba54e520698248b87b49f95f4c23aa8423d3f00ac1bc7d64c2e. 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/TCAHP2352258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d64981cba28b36e8b45f3bbce51c2daa91cb26b69640ef6c4d1128cb4acf1. 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/TCAHP2352260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c0b92368489436c0bee0c727870ee661d4e57a9968031225505ed2f77ed7c. 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/TCAHP2352261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0440e92995d4942161e80b2adf35828bd905c3d991f44361f394cfc0602401. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAHP2352241.
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 0x3ec2a90bd61932cc094904e2e178470350e7b991c4cd608df691a174196b7b97. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHP2352246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8197ee5da64c3913abacc143f6d2a8462ff1432ab574da0b8cdde417c2e23777. 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/TCAHP2352306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1aced3d17b7f67c788e31b944c831d9fa0cc347dfbbba2b5818db9a0ef31ea. 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/TCAFT2196155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e944cdbedc26c8ca7be83dc869005468866df7bcd07acaa8e67fd32bb8b00ca. 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/TCAFT2196159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a361b579d62b4d2b8a5460f335a974deaccdcfee64cedea2967ccc35cb9ed60. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/TCAFT2196165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a7afa681f87cb7757f2609d35ca4f1273e199cdeed7de73a6982f31290d87b. 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/TCAFT2196170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c014658269fda36e8543257e41226b27a212404aaf4d065d1fbea28844aac9a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAFT2196157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991f1edc691b28631dc61285d2e3cf6268ecc336a60a0ab7813e774279f1b7a. 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/TCAFT2196160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ba050f920671a356db105fee83d87f3f2a6e1c61ddc96d17abffb2d3aa54f0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAFT2196161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ad0032004cfdd34ba82298e4c7db47e12ef0c050fc1202e9b4ec96d2e2c4d. 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/TCAFT2196167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c51cc154bea17303599f49ee3dd99777761e7da0205fbcd193b41843acdd66. 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/TCAHF2375764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a64a768e59c2a38e28b47e9f7cd48719e4e5ccb63fe18f4267b737bc267f121. 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/US7VG2262722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba262e6c17482cff20d8d1bf2e64a033f01093bad49e085e3dadfec30a9761ee. 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/US7VG2262723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f28ced4b30d675f07e5d668eea0b64bb7dd5223c1e2833197b24498119e5b. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/US7VG2262721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e73f71bc9117b6090da8ff9743a89a111df1ebae3201ea9d130f98c11ece6c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US7VG2262724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c4e239372e5ea12cb588c12728881f7cde4a48312a66ec4f6294f9da7c305. 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/TCAEX2044406.