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 0x2e5a7f13d3a3bd647834a6e3818edd33ab3743627a72366e9a4ce88fc86e50af. 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/2a490fa5-332e-49ba-9f7e-260acdba127b.json and https://artists.proofprofile.net/proofs/artist/2a490fa5-332e-49ba-9f7e-260acdba127b.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 0xfc7f07856f18811798f48c0bcdd9fe7a0be6c48dd89cb802c931d19c5993df40. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CHA011300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9f801a5c0ed825e1a8193a83af9a22ef1fc1c1df24938c30fd406019972498. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:55Z), 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/CHA011300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5372e3c946ce2e3bc8a2b8ba25742fc4866fe7a1fb4da9f81a0496311a6559. 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/CHA011300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb977bf81c2744a5a167ca72b4525b1771c37c21061a1cc7174a587a598d1d3. 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/CHA011400503.
Dr letscht Popsong (Gäubi Taxis im Sand)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a63e51565848335d24c7436f44be2faf794df71277d7dd70d400952e5af175. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CHUM71700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9072c3a37693edc5e2265dba52c0b8885987dbd38cf236151f70a0b21dc61. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CHUM71900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe029f58c61fb02ad7ca958ebbac988a52d20eec2f10592fc34c90bad0d864fea. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:55Z), 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/CHUM71900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb1269731fa25cfc6f130068b730c3341fa2935b535d95054ea1125a953eef. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CHUM72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfe92699f3ca726dfe35cda4c975fbfec96832b60b36874e10b3e52d0811d88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CHUM71600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfe92699f3ca726dfe35cda4c975fbfec96832b60b36874e10b3e52d0811d88. 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/CHUM71600032.
Mani Matter Tribute - Und so blybt no sys Lied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f5b24455a197b9f036d66db83ab5f5b84699d475608ec48840acc3a6162ddb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CH1081600135.
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