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 0xbdee805d8788d9d6d02f5c20b3a1609b3f902be963cc5d4758a538587590bf6d. 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/b5d4fc0f-1444-4da0-8bd2-301f46374ac1.json and https://artists.proofprofile.net/proofs/artist/b5d4fc0f-1444-4da0-8bd2-301f46374ac1.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 0x127a8dcfa2ad5e67e24c19e7a78f11c32f420b2d50b2e118e3a05ba4514c61fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USX9P1155577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d727478da8c5c970133d6221162438447a8569ebe74f149da521c50b90cd39. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1209124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a8e2c5494a5264111acbda6f152fba599203622384c173222fee80b5bbf3dd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/LVC251100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30ebb64f44eaaf763973c136bc64f23c516953d11c548835fc41d3e2e91d40. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/LVC251100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bee15828aca9c21b9dd6fcc1ee33668b7c750db68c88a97e8c5f2afc819be2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/LVC251100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f4f6cfe41176a6c3a48227a717c4650a34e9d635ab2d417e41eb1f18e1ce96. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1377253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2aae57586c4eba4ef7558127e2e8d242871f569514cc96eeda52b1625e25dc. 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/LVC251100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a2a4b8c4a858260faa360935a944a70300eb98c8d8b6fdcf13c0ea86511a5e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/LVC251100012.
Ne Uz Vienu Dienu (Not Just For One Day)
Skiraties(i), Zosu Pulki - Move Apart, Flock Of Geese
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019debeeaeef6571ef4af6060809d67f98899ab66de67826278a8e584b1ebf4. 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/USTC30764336.
Isakas nakts dziesmas / Songs of the Shortest Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090917e5ba766fd3b268ca9e19a005cca2e6337e81bf4c8b1674359d6ee385dc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/LVA010900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f8586b503bd675aa8b3e251d7d220430411074404a6d9c33c4a3d7a32653a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/LVA010900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02a70d7dbabf3d89c2ba5b3aa64b04ffcb828691320a52461d0186f8e41a74. 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/LVA010900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d64fbccd350580fa7b62ceec5c12b64787775103fa46b4ddae2435116e3c4. 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/LVA551100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3c71e3db6edf86830d35394b5f3b391aa754d616231850e70b4600bb772cbc. 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/GBCKG0701802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beee27ad743b710ab14f532f5d06bd8bc7bb8d5547b2ade45db0b67a9df6275. 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/QM4TW1663098.