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 0x27233cf6070f9c9847c44a4f31c094ddaa5abb3b207784f4f6dc006e2de6630b. 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/39ac95d4-192e-4048-a59c-3faf83d5cd13.json and https://artists.proofprofile.net/proofs/artist/39ac95d4-192e-4048-a59c-3faf83d5cd13.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 0x65644a0a81dad3e01ef6c079cfbbc9a4bdb88d6fb3451d2fff333cce9f1e56f6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/AUNCC1600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12719e50e9f1d7ebdc436e86ce7d6fa40445b1190341fcb72fd3180318455954. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUNCC1600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f13b0b17dba9814997ed8cf4622720acb4541bc79bfa08decdcc7da77933de. 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/AUNCC1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db4baafad7467d6cb9a7143ad72f78131f41b343058ac5ad5eb519ac5d2c8f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUNCC1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf45c5414cd983751508f967b71be634e4666f4a291e75fa81e93a5bc79a9125. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUNCC1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3ee979b9a98e85d1f378180415b689a810efe0e596b2e8ef3ad49dc1092c9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/AUNCC1600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146f5215ec069390eab9a3b22f9856bf8f34bbff962996ef6b0b0ad2b007f22f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUNCC1600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bfaa9dacbbbe88b13422fadc7a9261dff7cf83460ac9df9aa9a7a39b507b5c. 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/AUNCC1900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f0cf00e78c6a52a3225c9e0350da7d19297fc4c021024089ba255810fe9c3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUNCC2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d2b0cca1eea300a8addb5672f8495b896df7e45dcdd9ee9fd66b8da94b112. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/AUNCC2000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb0329529aafd5967ad79aba1b3c9646a7734b212906557d65faab70639feaa. 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/AUNCC2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356ac73a546eba5b600f8f26fe04cda3c2a99841da3aab11cc8a9650e459f36d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUNCC2000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386374aa99b0a2951510220921e787356ca60f7852b4426327e741c09480aeaf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUNCC2000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf651d1e6c0a8e8cd9c68253c86c59e588a7f630d5a0a57fdce9e1a847706b5a8. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/AUNCC2000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc0af7c0c73794278b90df14ac545f544886475bf40a30b9577fd76c41fa27. 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/AUNCC2000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529133822adfc3eab2b78b17ed1cb2a92f5eca5ab798d7e69fb2d680e3b6c489. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUNCC2000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a56d7fa0f90ea51e5cf868d8a8b0bc2839b3b39344c15cd4dacde09b4704e86. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUNCC2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf01084bac8bf29c1f4fb6868005a3af2ad593bf38f42c126d685331c3e98bcb. 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/AUNCC2000178.