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 0x2b9eccf6964f126aa88138a2b11466c84661480d613ba0ded42c8c0013cb5f71. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d57c3fb-2468-441b-ac3f-516b69cc7854.json and https://artists.proofprofile.net/proofs/artist/9d57c3fb-2468-441b-ac3f-516b69cc7854.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 0x6827fc24e05cc1c623bec9c0c085b6f3e5780a8c6e9c6880e575e0cff60ccc95. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMBZ92367707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236a4647a006b063d22efba4602a153cd77a477b0c23edc3366c4cd551060b42. 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/QMBZ92367708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c62b8af060c2c4f2f97990da8fb3662b17a906bb417fa9b4829204ae54a5149. 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/QMBZ92367710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722b74c50584b843e6655a7ba0b2fac57c92adaf3d237b50291b10cf22567be. 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/QMBZ92367712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1137c37ea6db3ee13c5fe1e04fafa61fd4bb9d28a76ccb5ba76043362cceca. 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/QMBZ92367714.
Que Te Quise Con Locura (Malagueñas de Chacón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7164c710cf91cf24bfa41dc04c106727cf0490b2f35601eb421af39aaa2b02ce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92367717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7d61c25f5a414095768196ed40e5315ef93361ec6532a21c9d290df2417052. 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/QMBZ92367721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81433350fc9d45f1f87ea7807a5da305b5bec53f760d53318daa77dc9944d6e8. 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/ES7732402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4a735e0492859be2f6d703fe427392a8318484c949f87289afa3077f1c0cd6. 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/ES7732402041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613899a9d130775c7791d8644387fe83061e8ce975588d5c956a2388e7ff876. 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/ES7732402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5166dde067a05115d94216f33b882cf0bb9def411992493207a0f280374604b. 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/ES7732402044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a13e0f58af1972b345a4520a082e5b0154b5e00b4919b1bab1cb4a33ff5acde. 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/ES09S1800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddd8647f8c224080e4bc5f4e385f711ba163c3fc1339686f350ff8cd82e14c. 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/ES09S1800208.
El Aire Que Respiro (Cantiñas y Alegrías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15033544aad22bc2263835e5f0f5d302f7ce6de3214a3117b39adb5c7ad3d8d9. 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/ES7731402023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910748e894b9dd01adb3cbd5c6731859ea210c9afb910aeacf3caca644d7524f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6102200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db7cab650fc59f9490cd3d9f112e85e53560634b865e030cf2b74f75431a29. 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/ES6102200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9938910d68ae11c695a7e5de738a99fd18a8177ff3accd023200c1ec9f1c2308. 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/ES6102200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63616d2e6e1b526a3669a9a01f77e9c072470042687af3a4426d8bfdca17ba6f. 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/ES6102500144.