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 0x0fe755cd27857f7293a7e04c0d0059eeb794ad6bfb0ddf9d9ff5ef89ec9cdd01. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba0f9aa4-0d0c-4e19-a35f-5fd144bed23a.json and https://artists.proofprofile.net/proofs/artist/ba0f9aa4-0d0c-4e19-a35f-5fd144bed23a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuarto Precario, Experimental Revolucionario
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 0x62c0c6543ee90f2812014439ac14c5554fc947816b76725229c7e493428b0285. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G1511517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c01fa3a92f8e8fb6b3c13744edbe720ee44aded266f85ba26ba32b3c4c528e. 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/CLKT22404772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001e18212c5e1bf7c38dee83a1a9f23929bcadf404f77ee27d16cdd22f2ce338. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/CLKT22404773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e59b62f0d49ac5ea6e32af31b1362703f4d24821fefe6cb9662edac1b0361. 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/CLKT22404774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c67a9c24120feb0557cc4b3d948e262ef2ec7c834f7c8cd4629c448c6a8e50. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CLKT22404775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970734bcd50f8f4c1ee9a3953dc659381144f65ce22ea4107229baa18e71bf5b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CLKT22404776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa628a850c8d2cd59c264ed96483cdba0f85a19feea27843b13ceb158646a55. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CLKT22404777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c34b8c7e2910e68adb9a55a7e81010eebb087bc21f2709f6a26cd6fe8619271. 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/CLKT22404778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2dca3d43875fe1833f3d591d43f338bed688f117dbc3485256f2cbcc222fab. 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/CLKT22404779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113339e86055d954960b5582589b3a97992da23a8a217f5e6178e39861b38cd0. 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/CLKT22404780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8535b24ba9f86678416e36f5b2087678b6be38056cb18f4c7a371802d9c595c4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CLKT22404781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4057bf5ccc6bafbe70bd1efa258ec0451910baea56bd7282d577dc8496187. 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/CLKT22404782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72d15dcbe496aff9404babee22b291ebca3db2f36f6b54bbffd9b67c80cae52. 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/CLKT22404783.