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 0x5e3b7b30f4f47b52f58e9c309fe926a3ba858be1930308a2501a134700559097. 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/ead1e9e3-9013-45c9-8b9a-506451c53cd0.json and https://artists.proofprofile.net/proofs/artist/ead1e9e3-9013-45c9-8b9a-506451c53cd0.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 0x1cabbb73bbbf467b5af30f5927f7a181f7a158db21158511053a8059b4f92e26. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CLCC20500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf391f1df4c5351a9b631fe99df24ce9d87942d02a71d7ef4bcd31fe2890e9f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:19Z), 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/CLPP21300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614a2a06d7cfa228d1208981e2c4ad9cf04c183d7caf6ec2c86455b08a41b5b. 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/CLPP21300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599791aa97a943791d002bc9252792a06e1488b831f123379de105995f3302f1. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/CLPP21300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67248e9efffbeec8bb7f954ca678ba4ea9d088ba3a2731f0014a6aba92121a63. 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/CLPP21300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5f1afb8f9f5ec667713a45eda9c70aea98487f38c8a0c934bb9c7521faf377. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:04Z), 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/CLPP21300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64505c614d7d7e57d0d3b50169365d348cfa6a1ad37f7cb7708c9c38b5ff6877. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CLPP21300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940bd2cbb61a4daf6da342ce9f628ea2595e14cecb04bbe9c2df62a0fd549a2d. 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/CLPP21300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db9d179e603cede38f39310868dd1c09175752eed5c41f47ddacf39222c90b. 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/CLPP21300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e3bf2574322fcd780771a675e043476be1481242bfa7d398a029e0e8e76a4a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CLPP21300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadccf7bb8574b6978173444eb756e6031713fac109efe87d49a9d57f27aff6cb. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:50:44Z), 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/CLPP21300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6507b4ee2151326886dae0f790efc5b8dce7e3aa423c9d1b28ad765861b558f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CLPP21300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb6962b0a8fa8ce4cebc170f81e2413ca820b32adb699f43265987bc8790a8. 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/USMBR0603659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a583280792dba825176f6c52a66d2cb2031114ad968bbc862d178b4d43ad8d1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USMBR0603665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8fc66093af858be41057a34d6e8dd7ea73a3c0dc7159a2b3cf028094c60b6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USMBR0502910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236fbacd22ccda05754d0e118045e274c80ded7c551c4ba471fcc4270391d2e0. 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/USMBR0502920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f1410dd21159f3a17310469b0412990a8447ca5a24a00f905888cc13a6e99. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USMBR2114943.