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 0xcb4d4dff2b8322567590e9db8c5796d6cba8a1101024f48e2b37eba79d4e2d7f. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b335d805-01e7-4f47-8b32-5f5b02bb1667.json and https://artists.proofprofile.net/proofs/artist/b335d805-01e7-4f47-8b32-5f5b02bb1667.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 0xa511453e9e138cae71d61c676ff8e39f2a73cf115a61a7b3d8223965aade287c. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/AR8L71403175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7749dccf13d45a316eae6331afca4850d73b146c5ac253a974492ee545a736eb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AR8L71400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de4a7e81f598b9e2306e300fd4ebe178b34b9674ed561127a0b6702f8dabac. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AR8L71403183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28a4680bedc27573b2ffd2f6c8b47f24c01ae2d0472f98f8d17a547f2551f50. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AR8L71400837.
Calla Mujer / Ayúdeme Señor Juez / Mamá Está en el Cielo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c13c0e8279ef9c444e46444ce16f0443b956a6ed89fe85f8acf390b6b46c15. 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/AR8L71400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0c2487c0169be40c356168b1b0fe5eec88b45f358e4c5bb538ebfc869feaa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AR8L71403170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f45a50e03562fe931072cc3a1b479191825cf1a5ee9d65c94160dd1aff2f880. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AR8L71403158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7b1838409d0a7027f9a768ec34b1c1fda93977129575943989dee63aee1339. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AR8L71401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd90d6a5bf2873fe18b59ea8d038357df992162b75c624abfbc685da868c035. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AR8L71403154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1246b2706ed22b09ff875db9f74c4645b3865b65d9a21e0fd3b03a8fc67c7322. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AR8L71400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4c5aca166d8768caacef67ac633806b9557d58f5d4ce3f6e30169853ab7fb. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/AR8L71403161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7dbcd446c7858a5bf73e21c95e1858dcadf1581ebccd0889e9b5604710532d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AR8L71403155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a0f4df37fe82b22c1d6ca9217651e8d047e45047286bcdc71601431a1fba24. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/AR8L71403167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e2ec551a21979c26afc725a4c7b264dc92548238d9b70b1f8b7e6916b75b7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AR8L71403172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29619d0201d5c89d9ca196dbf5c1fd1a189027ec86aec51f5de221c8170b994d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/AR8L71403171.