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 0x9242ca0ae5abf8bd52c68c5b5eda98d910a722cefdf7cebf4b13288c886a9d0c. 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/0c0ae42a-ff9c-49dd-a75f-62342694f83b.json and https://artists.proofprofile.net/proofs/artist/0c0ae42a-ff9c-49dd-a75f-62342694f83b.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 0xe42a3086cd8175db5276208271822a0d3772945c856492d065b2ff4cfee1706a. 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/BRDPA0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5edf5713c5ef9a14fb01725168c513db4ec2c6f40ff9ab81ec97beb7d2ac9a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRDPA0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f4a240cc0e4a4fc448fae2ea501523f75170516f406237482125f740cf041f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRDPA0500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd605e722b91e4f129d99042fe0bc5fa59805fbd849f0720f255bb26413061b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRDPA0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd49851afc92c6f8e4f1037c554e46eb109697c8784bebd9a2de87499b452421. 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/BRDPA0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea73420c5c6d1fbc30ac619b755ad1cfe07981fb2c2ea92d6989e94a3f43eba9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRDPA0400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633b67cc46cc0277a60536b34e06ab43ff445c50fa2ba1bb5dc42d053d7eb4ff. 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/BRDPA0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0c3cf5c81e54fe16fcc37b3a341f07e14511eea7cd6c8906518d7bd734c9c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRDPA0700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a463a836304491be2af9c86c41e8e090b7ef8fd5dd54e952b2919e39a81ae2a. 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/BRDPA0700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b1fb11556d01b947af98efdc87869708474afdc27e89d6f486e4e4e7f9e459. 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/BRDPA0700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2cf5d96cbc96a7531a9cefa37b5a979daa5398bbb5fc40a9d5678931fe3703. 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/BRDPA0700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab16bc47e30ca00ccd479ae18478196d7d4efebf020b9ce25530425c3b49fce. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRDPA0700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81ec228e296d48b83aa1d8238223aa210e10d607b13c84471eaf079e97ec5b1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRDPA0700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44256b9ed2aabaf1c0228e526e4adb3f0cfac8f9ae4c9ce798088e85bb84845f. 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/BRDPA0700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078d4d8a8aefbe0565f5d7201a6a780924537f9984a1de6d4915e5c96bc57da2. 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/BREMI9300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc739b190886818e283cff9f6c744b1389473de2b9574ab25eb207d26fc499ea. 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/BRMVP0401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411fa7ab325de039b0c8e0ff8a45de7adc6041c9acab6b692be1495c4b155a2a. 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/BXM2X2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3811966acced0b3883f693095fb65cad96cb3174438d6a6fceb53ad7256eedb. 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/BREMI8000316.