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 0x6c3e5a27dac6ce7d89a8566c60993ff5e794b290aba5070a7ec41fc0a7bbbf08. 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/f6eb1370-2b70-4805-b601-79d7bd37c3b8.json and https://artists.proofprofile.net/proofs/artist/f6eb1370-2b70-4805-b601-79d7bd37c3b8.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 0x2a2903f9bc4e272296980052fc36af117d7b7be20fc31bfd2ff0d6c66c98c3a2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BRWMB0200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ef6dfe0023bb92262792134579880c69cd948e59bcdf5ccd3bc8423dca3415. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BRWMB0200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dc50bd6329ce459388bc7e5d9c12109fb5091504ed83081aedb9bb73e18c5b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRWMB0200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42295717650e6dd52c3a2ea368c3b75adcf4e40e6162a0d833512f139c8f9e28. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BRWMB0200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75612598590839972963ccabea7880828f15008cfc15d68beb57d235f35c186b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRWMB0200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb318079301b2bf830af385af19ab99ee520f205b3aab0e3592b9b704043e2ef9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BRWMB0200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1663fed625b86bcac489ab9f32d47536ac65d8a3538806d1ed2433ebcd5429. 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/BRR9G0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f53604b789d6e28348fc1ca265f4c3b6024ae8eca7bb11b4431b7f86d0cea0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BRR9G0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161db8ac56e6d3eaef80fed22e91c9418b8c5f0ab71c4d2856b73e4f2bc42b54. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRR9G0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b21a5c6a2832d627704813401e18892d19d8e9afde8c05b4c4845ffd51a049. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BRR9G0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13328d2699d7d9e906da959f1fbf63269d5a82e7dae4e421c624e6e62f20f4dd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMKP1900496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1295c358be7d1a674ef2b1d21bf19ecd4b1922f8a9e72a075c91d0603ed7f63. 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/BRMKP1900499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864e9a734c5477ee61fe9e9922442ccec439f22b0429074cb15ae15c5ef2cc5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/BRMKP2100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a163a97b4c7d21f1df261c808581cc649564a309507ae1518a6ec639e20cc70. 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/BRMKP2100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803548420cad4f191d4583a45a8c2575c76c887ebf7c889c0f6fc26a255bd92. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRMKP2100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce2d748cfaa4e7403d74cf58534f4f0ccd75931f7c805e5c1aa9ecf72d4087d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BRMKP2100600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955e1fef856824e478bf583bcc117be2facaea4d386fd5d4000eb8214e62245. 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/BRMKP1400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a85ffb897032aefcc8d80216e51773c42de173cc6c4e510a7fd4b0c0b66e9b. 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/BR3FI1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fafd00fea9153ac94728f8a9f78a05151e93704780884dc2f8a7493e6fee575. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZGLM1943449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d96781df1f926d2adfb71a489db6b205d7b79f253e59866bed12528d5961a5c. 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/BRMKP1700690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da789125314de4eb6454fd902d8440854be98a8515655be784d6eb0d7d0cf0. 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/BRRGE0900240.