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 0x4b426aef5cf33de7e0f545e01b03ab5e3c3bebe3d4a6a5c6172757e57961be4a. 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/4d910fc8-068b-4e58-a597-172ed1585fd4.json and https://artists.proofprofile.net/proofs/artist/4d910fc8-068b-4e58-a597-172ed1585fd4.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 0x907ee440540efec7945ed052bf2df5e053c44fcd6dd57250467580f791d4371c. 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/FR96X1580005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc075bd07073b99725eae9aa6bb3f33b817697859c49e30ef2dc7e343759ce898. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X1580007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b74ebc2eedaa716af546deee79894a034b2e662208cc429e93b451ca1af4e8e. 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/FRX452424222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c40111e06a24cd72ce15143c1230bd39360e91845ea57ed54ab547fce201ed. 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/DGA052367417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf794f90f44ef792fdbf00333be84c328064fdff95c32b1847d2120fb02b8c. 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/FRX872170118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab0a12061352883a7093f601f719f3508cf1fe7baf82317c1c732678fef75b. 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/FR2X41960417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e3fdfb9acafaa7f739373d13cab1391cb2257dcbc7dcde8d5e1110eb0319b9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR10S1914481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8e2412574e40b7fba8e74b35d7d3aecce14aee55e9470d26558d406523b803. 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/ES50A1800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6bdcd1270754d3d00b8aa9e8302d09a986a53f106000b0fe883394980fec79. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES8621700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc0772cbcfe65e38fee805837fe4b15cbb3cb8e743579b4b2783eef9235b46. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X1657735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771a06f7fa34fcb948de2d40e531c0a20afc52d1db9eb4547262e16fd5afa348. 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/ES5151600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9547ec01e523360e9212a7d97a747bfe676960db0238b71d6beac2e2d5d64. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX281508380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98663a55607af3eeb7a2b535d5b40e078e82171ebbba451e3b004ae3b9c4efe4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR10S1520998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4150f40bbda707933ac358b38cefdf4b924e85b3196b6afbe0bf23ea7134df6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES19S1400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ba9c4597df29b2547eb96f8315841c3927aa2511d4d695fc7426a5264d9c26. 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/ES19S1400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3194438967ef0f581b437d6f517d15db55d7e7ca97dd9f989cd09597ec3f51. 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/ES19S1400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53cd7df93b0caf981bd7c794ceaa67b1b4efacb0f12cbbc94cd1a6def99a17a. 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/FR6V82154901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1af1780e56579c5cf1e5463ff3c66e049e88fbc883e3e153dcf104704559c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES16I1300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b85c497ed9a83dac16e575925a1896a6a268673212b942c764a1da2a9bc368. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES16I1200242.