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 0xfd65d5264707230a9873a7e2e97a69d33165d0b2ebf7b94b1aeb21632d2f1f60. 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/de40b9ce-b8de-44d5-8934-952ed0c94e0f.json and https://artists.proofprofile.net/proofs/artist/de40b9ce-b8de-44d5-8934-952ed0c94e0f.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 0x4a1da6c95138f1c8d43071a1f78f6b4236f0600120f231593d711f3a50096692. 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/QZFZ22051938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a7295abfca87d3031d75159b77a0472fd2c40021789568b82d8f9eb8f57c6. 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/QZFZ42072403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1bf8211e38e180a6a3620f4e8a162a7b48ac1f45579e71f1751e1f966ae3e2. 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/FR26V2027238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4058b4fbe21e718c922971a806196979dbfe648f144729dfa037b07176e9ec83. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FR26V2079630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5fe747cfbd6081a91c489e2b8b9f056ccfbe9bf38e17765a5055fce8857611. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FRX762170281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4cd8503d304095673b5f2622b5ebe56a2fdc8818f6768f13748e817f80660. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX762170282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf444a7452fb6719de54b8e7eb40707f571178156bf041acc77c364e89dfc38. 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/TWAE32303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bf8a205b09321e3bf82085ad5a8007164681d90677950a9a7ee1da5c11797f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TWV812379101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa697d6349e782609e77ab5dcbfd517c7ec54def44d1ff6820f220ea0e9c51731. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TWAE32301932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a028bdc968e4a8da02befd85e54484ea9ece1b0291c63763efe395dd7be1fc. 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/TWAE32302829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf444a7452fb6719de54b8e7eb40707f571178156bf041acc77c364e89dfc38. 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/TWAE32303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb82a9fdf03409b973b4e5567cd58e03bd082c6637a4763b7c45a98d3dbff8c1. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:04Z), 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/TWAE32303012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cef1359bc60200b874bd511249acb94c56e16476e2a6a9155c5b1b5a1327c9. 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/TWAE32303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a04f6bb4da2e97c03ef69c144171117f981e61c36c99b06a39c01fde5604de1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TWAE32303644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f85ad069c504092d0b96f434f874b0ce88bf3d5ab2820582fd00abe01346467. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:12Z), 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/TWAE32404784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3734988835fef711ebfe3694a71eebad2e8a4e0829186fabae87be0fb569f5. 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/TWAE32405023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd931fcdc4cfcdda079eff1a4b298fa04489c604280c0e00db9c24cbd09a45f36. 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/TWAE32503873.