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 0xa19e68e0eef3d9b046e3f8456e9c2a25f59a2ae0fc23f7c555d231afbea486e2. 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/5928923a-8d2a-4aaf-aa72-31fbf1b0dea8.json and https://artists.proofprofile.net/proofs/artist/5928923a-8d2a-4aaf-aa72-31fbf1b0dea8.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 0x53e758b62f17107fa662965706b70366ce12a854398ee71c81161b74478af113. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ES5107300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d74b65fa3e7f97af25a473a3feb7d6b09e76301eb2e79dea267d95591737c8d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES5079000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e98df15536a35ff31c00c1649519516d5204cfe7a241a1c4650109a6771fd2e. 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/ES5079000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ad9e1d5fafa82e200cedda37f0eb9982fd48ced126e759ed5b2eeb098bdb2. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/ES5079000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb4d55428faa9806124a01c835dd3d44d0b35c5e9e61eef88227b2915b5c238. 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/ES5079000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc824c51501a14e5594dabab12242c6aeb99fdf819e5498f72f08c70abdfe4ab9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES5079100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5389eb937bce4958915ac74001a826aaf7c980c0d3ef0daa696d7675278f084. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES5159726001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebff2a46b4e1f04a28e93bff329c93ab127150a6bc6a5532c2b9db8a2efe225. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES5159726007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c0ab67ff9ec507acaf08ac508067a0a827705320b64be6ff79f93b9cc8112. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES5159726011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3e1b0c5048601bd905e08622eb8e99ceba4d124d18b5d0a96d09ff632e4bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5159726012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bb03ab3652959f72a145920be32bd3a89cc5037b209bd8b234b655f0edb19a. 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/ES5159826014.
Tiempo al tiempo - Canciones de la Calle Hilario Camacho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a285179654ee20468efb0a7e7e452e6d9069f875bf5a78d805cad0f1d0be19. 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/QMBZ92050087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0645e3602174fab3cc490e67e0f2ec861eb21c3a7fbf33f4d895c10e461366c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ES5159726008.
El agua en tus cabellos - El agua en tus cabellos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18af64881329ecd03514d10c48fb0a37843984dfc758776be75b7565baa3fae2. 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/ES5151200504.