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 0xf3204c924c1fd1fe59d4fdd0b829ee9bbb5933d542f22bc5c95d9f2f9d2a9a6d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82fb6bb1-df98-4599-8995-88fc417a755c.json and https://artists.proofprofile.net/proofs/artist/82fb6bb1-df98-4599-8995-88fc417a755c.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 0x0dd2a4daad558dd31dc871dd10ee688c3aaf6a35138d5ad33390eef5012cb7bf. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/HUA612200427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383025030e520d63344b2204cc8157a56748fa4f2d82964842bf93629bbfd714. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:30:23Z), 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/HUA612201185.
Kopogtatós (József Attila - Kopogtatás nélkül)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2e55e658492f41817a70166259a9e0dbbf8defb16644f2d2b441d04e4d32c0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA612301805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2a5f8333c29b681042e5092444c42290090446cca6c5166cd3d973ff73d6ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HUA182450901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe105b8ad475a0bc09c62aa77a3f74aa55ab2b26a05ab04f33c16dcdf73ec6556. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/HUA182450907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa354cc604fcdc62a62a2a2533e34ae49a571285889b2f5a7c5aff9312aaea1d3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:22Z), 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/HUA612503332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401eb1ad61127f51defcd2dd177742f9bb0627d11334e496fa4465ff5090765f. 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/HUA182536801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0266e5ddcdb95f2c914aa59989ec95b8a9ae76bfa626cdbeb568b221161051. 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/HUA182536901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e39c516c95c5c336d56ecad05621a49943a1ba2456edfc29d37b98096859f. 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/HUA792400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c750161b621bb3a61f942e44e1266249fcacc1c1189bef37638807b48d842. 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/HUC571410568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a74db1c47f0ad622929c13d71426f8d6ee81b9b13d9414b6df7c17a777d663. 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/HUC571410575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd0fe0c16c5708ee4a28a0703244919d622a7c74ca557f477e400d1d52ae0a. 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/HUC571410579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f248e71b6b456d18515127b8abcec9bb16e817bb0614bd493ec9018c9a59f9. 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/HUC571410580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c894488d4417bc75dffe2d2f45339d508a90be492f4571aabe970ffc8b170. 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/HUC571410585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb019c2f16695dffb77adc4c02d3cd6312da97dfb663b0b46b0fe499482b2814. 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/HUC571410513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ffe54aed670b655d8206157d45e51771775b59b2da407fdd43376baf5a9af. 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/HUC571410523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4cda73e9ddec2efe1c9ff4495205d8000d3e4b12d8dae9b34070abdb6f096a. 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/HUC571410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745b22358e11606889cbcf69beaae3a7cbe00522dff33a242f3559102f6e989. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUC592400126.
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 0xd4387922700d14d1ee13cec577900f4026dbfb2851700b92062b5f44d29dfab6. 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/HUC592400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005bb279bb3ff082bb1a73b78b0150c11fb363539cac13167f774d89de2c2498. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HUC592400132.