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 0x1ac6a2dc96e2fdecb939e68a1eda8fe41897452cc4dfe67c66b065ebde8304d8. 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/025ca437-89cf-4e64-a2ba-9c90b90ef19a.json and https://artists.proofprofile.net/proofs/artist/025ca437-89cf-4e64-a2ba-9c90b90ef19a.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 0x899f81d4b680ad2ae99cdda8817a58f3c0372e471d1f363027e9c4f107b1a685. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/PLE552100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9663ce0e35ff9e4d8c9f3dd57b81122d440c11cf4370611464ba07e32376020a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLE552100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fbf7787f14bcb5ac6ed500420c7fd797f730a95de8a07336d14bc47b846a6e. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/PLE552100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceed894bbdcde327df60d8fda7a4f515b210d75eef8949ac279f9aa5cb81aeb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLE781300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664263f37f3e9b8fde276ffbb4f9a97b39d7003cc6cd0edb648b1c0ea51738af. 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/PLE781300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702dad2d1615ece20f8427bf2a5d5a3ffc1957e98eaf4d07b9928a1e7dfb9e0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLE781300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971fa79198ef4d74dc6a977d8d4f1faa70635753a65b87645d206f32cd6c9a9c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLE781300214.
Są dni (20th Anniversary Limited & Remastered Edition)
Kodex (20th Anniversary Limited & Remastered Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa480e1d794c2685d1a30ed1a4cd74f5d907ab7f460c199bcdbc2a44d19ac2ba6. 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/PLF391400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa480e1d794c2685d1a30ed1a4cd74f5d907ab7f460c199bcdbc2a44d19ac2ba6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF391400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896c3e4cecfad5f2ee7afcaa00ec5e0e6b3044d618d29444a1d9be161371341. 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/PLC060800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66b400ae47f65ec5eebb3b1a1f5ee284dc2008315013c8c290bb37ae1de6d4c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLE781300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4182499ba329e102f4c1bdc41af271d08f6f98ef7c9f431b067ce600a7b6cbb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC060800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82f39d30a51be85fa201b4ea4d84737080dad8aaead210b1862f95540e95d4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC060800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c100420ad6fcfb6bd38b3c4707f15abd8a20622df77a4e5ed8a11af2f6e5f. 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/PLC060800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad99c0a5c8e5b5a51c1a81c3f5b5f9599307704d30bf45a093f5f166d199b87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLG961810014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd9f98d5123e69411ad9a5ba28c26b130a6b078c4247f5e15ee21f04f064dc. 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/PLF242413338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa68578ff52e8120067ec0b2bc70abb6a955471e5ba978f698a454e5b96c8d. 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/QM42K2232523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe22a9e6dc0b5385cbfa52f0e235a5583e62adb2705de2e20e6b6fe38a4c7c7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLD501300048.
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