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 0x9116070f3e8ff48f491dbcdda5f37739b2386aa2010a9b335d788e373c46ee3b. 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/bf224b35-cc4f-4145-a8ba-818b8339f503.json and https://artists.proofprofile.net/proofs/artist/bf224b35-cc4f-4145-a8ba-818b8339f503.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 0xdab604b15b5015ccd30170fc421fde47dd6c66be8931b202cf09b8c4bdcacb1c. 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/PLF242108155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1286ac9138a8ca3973417ede512aa300d398479a675068791e45fa63af21132a. 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/PLF242108156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1f504f9ca32ea0e73ed4dfb34b1d9549dd22e9fb7b307425ba75715bc0f98. 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/PLF242108160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4ce67bdf97d615d88694f55001b0b8a4b1e1aa17c94804deec6da45a438b2. 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/PLF242108161.
Coś Dobrego, Coś Złego (feat. DJ Urb, Reno, Lilu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3308240af61abbf4b8ef8da39cd4baed62062a96c61eef8b88d5ae7416c3c40. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242108162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa5db59b66df6da159e3d6f2ab557592dfc70f192e236ecf9bfcd40f2ea43b. 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/PLF242108166.
Imprezy I Bzdury (feat. Lilu, Gruby EMS)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983fa6aeffd48df6d3ea1f5dd67cb5565c13508b7bd5fac1ebcfb632e1956b80. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PLF242108168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15820884076d3d537a95b14e1b6cab36cbdb0c363ad2ae3afe158eef513c129. 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/PLF241200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e72c529cb6528b7ceab3bea2843ef2471f8d520bd8e194570d7ca2f68a1824. 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/PLF241200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e7783c1f0dcb8b446aa2fd801cc28bf96fd7268fcb990bf9750e05047e641. 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/PLF241200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f77159a73ec72776746cfca6bc9955f9bd893f561dd21ee3e034a74d3ea566. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLF242108179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e0683d98c7470f540d35a445dedb0538212e5b872e85ba5fc94dd3c269622f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PLF242108186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaccaa5a87463c1d13ae869af1b700e476d7f1b197cdbab25f76faaa4880208d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:52:23Z), 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/PLF242412097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbccd1a5869d4e4be36193d85dbc514027663995cc7feda7cee63fd4eb58940. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLF242412099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21857864fee23fa2c0f2adfb8b1622725a2f6e633f69eea2de7abcfe1fd2d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLF242412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd77bf61f7b5ed70085bbd2603cf2fa67b751f56bb4ac4175d411821ea3b23f. 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/PLX301800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ae4a34ca5d5c01fb29af3068e4ed743380f24cae26de4b1160cfd2d697059. 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/PLI369876960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c5836fa3acaaa16ad641fdfed67ef5e5fe8e7db317f5e2a8b6262f626b6f4. 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/QZAPG1743842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ae4a34ca5d5c01fb29af3068e4ed743380f24cae26de4b1160cfd2d697059. 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/PLI369876960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0c46ccacb0219e9cfd26a4ae568eff6c6cf44dfef7320b20306ec0b954d71. 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/PLI368536420.
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