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 0x4fd3f67960ee4526f785fe9992ac0734e1e260d4beca84569d0b1f9dca655f0c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44401e6d-5210-4d67-9203-eb2a69780fe3.json and https://artists.proofprofile.net/proofs/artist/44401e6d-5210-4d67-9203-eb2a69780fe3.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 0x0dc392c5b1bf1576d56160a807e7629bf9782c1a0b99378a997cc9bb8905c08d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA560777020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9e5809f97e3657e140dfff85b28510a8160ab35ccb160c597b68b1b305781. 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/USA2P1249725.
El Tesoro De Otra (Unplugged) [Acoustic Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca84bf75e84aab130f82241105e9290d8e8a1bd8cc39d6e0dc9b5c11d5ecd06b. 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/QZZ8A2440112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a98e952cd471c106c9f936856e8d36eec2cf32bd876525fa60e2216c7a3e08e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:04Z), 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/QZZEC2406370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfa7a77770fb456c80efd53dbc215f9a5377a676afb9973e39a4ed245cd9bba. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:33Z), 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/QZWV32567487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6219bcebbeb05f8fd246874ef4d641c5c30cff058816a572326a7882dfa90c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWV32567489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0d12df407cc5795f77a7ec064c82ea1c6740493b0b2427bbd5f5a7d1f46f6. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:20:49Z), 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/QZWV32557104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f877cc48b26525ab5e56cbc877623e1181d767a64d3ffdab22645b208ab7b43. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWV32567490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9104db5aa13be34f7b57400f6c6bda7f46eba5913a0b84fb918544c560f0ee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWV32567493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e1fae95b65cd34da033ee38ffc31cdeb53b1baf46379fb54582f92b339ae1d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWV32567494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a981fa7647681746a4266ba2b11e636e6c0917c3bd70393815cb4fe9d967ad. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZWV32567497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e43d0362ba98df52bb5d13f773df9d0d71a0eef71afaf00e5910ac0acdc7c46. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWV32567502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf6b8deb0a08f25362389d7c0a155fd417db1a2c4bed764a22f49a5ae6cbc29. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:34Z), 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/QZWV32567504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa553f3b608abd5838d1c01968b12333affc1ccdaf9f9829b2770beb0fb6cff1a. 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/QZWV32567506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd602eadd9a4d7c62d7d2a15f34d16e24e1127439419ec19b4d4080019193a8ea. 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/QZWV32567508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46172e7e352b1d808930deee8af4dc4c0d47ed2b0bfc169928b21788e349bb0d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWV32567512.