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 0x79864762ee35c4059848b0d800e3a320981091ddf3ae85f60eaa57fc117c352a. 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/0b81c53f-8a0c-4e73-85cf-70c5e0b06cea.json and https://artists.proofprofile.net/proofs/artist/0b81c53f-8a0c-4e73-85cf-70c5e0b06cea.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 0xf3b58c849232ba32262c0cb24aa237a6eb7fc242845282a3178105cb74ff9023. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKYL11300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2c6fcc8251fa849de46e6e86663c46ec6c3a6fb754b21a39313ca48dbbf68c. 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/DKYL11300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c60ec2d323c3a5f11ee3956c24503bfc57fb2200b76e7d8e65d23b7069f8dc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKYL11300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ffaabf919c7fbaf31e43dd4d571c2dace1692160877a65d14f992df43e4c02. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKYL11300507.
First Time He Kissed a Boy - Karl-Frederik Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcdc33acd4463aa2e9391769f3c2b507d06ec46cac0898a7e8f76a266446af2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA61596146.
First Time He Kissed a Boy - Urbanus Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2640fb936b1bafdd3432d506f3333d50643344d975d32fed4256f98ccf39051b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA61596149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a41b2b1b21f0724c5c6fa57f4cac6bba52a9477056ffff49d5acab68b018db. 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/QMBZ91557914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90303ccc23ad9d4613c03caef41d7b04c9f3615a2fe948299722fd33fb380895. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QMBZ91557910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6ee11a68d3c74d0cfe68de1882a3577508b364b914ec89df40f7dedf1f744. 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/QMBZ91557911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7bd432080b4cb2f8024fd0b170e0ed6e9ebec38d0721adb76cb98fe57ecc31. 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/QMBZ91557912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7105d51c923ab04902f0f8d5557f3f3113546b18f670138850b610625b164082. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMBZ91557913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a41b2b1b21f0724c5c6fa57f4cac6bba52a9477056ffff49d5acab68b018db. 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/QMBZ91557914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6ee11a68d3c74d0cfe68de1882a3577508b364b914ec89df40f7dedf1f744. 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/QMBZ91557911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a41b2b1b21f0724c5c6fa57f4cac6bba52a9477056ffff49d5acab68b018db. 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/QMBZ91557914.