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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20370558bd52a8320a2fed89287768b3593933ab41b47180354aef522dbe7a81. 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/aaf0a313-0e7f-44bb-bbfd-36bd297dcbbd.json and https://artists.proofprofile.net/proofs/artist/aaf0a313-0e7f-44bb-bbfd-36bd297dcbbd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0538a015a18c10024dc77aa5028cf178d52158226f44ff0211bb7d6927075576. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USZZ81210087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe86eecf98ed3bc6a743319d61d5857bc795b558bba44c0d0dafe789e224559. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USZZ81210088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde02780a808c5260f17a1de1c1dbfc94d243b2111e32c4c10c42bc75a87fd697. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USZZ81210089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb745449bf8305944f9896afac9141fd26aa52e16f80b75f044ec526395f56728. 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/USZZ81310060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6e60122e1d5a99c366383afbb2e92ef014d6044dc2c60214c3c9f65d1d0457. 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/USZZ81310061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a94d1b4f4c7ec3191aa607cd22096c53957d2123de703cf56f19575f9f20e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USZZ81310062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f9554977b557a4c5f23da153dd86ebbee83a7fd5a3a86de02dd5f2232c364. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMCE71300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886af172505554fa8920aa53d733e9d44afd5857e46bf111668706568b1e0ca5. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMCE71300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9cb8b441278a3b1c68587adbf5e1de0bae422a170285aea1d57e57e8bb5c67. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMCE71300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76333d16db9b51b7d05bd2a5e28afb8fbe307b77da64c2b583322ee3e775147. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMCE71300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f09f841bfaab437d838186e500d5d63c6f2f2025d6280a107b12d455afa439. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMCE71300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5895bf1ada22174e6a3e99bfc709e512c78ba621c7680cf13594347a6bcb446d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMCE71300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a051d083d02f940ba679bc5586814639b4b305f2286c40f2f13972556d34975. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMCE71300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc331160adc1a0f834bad6ae58b5b84bcd8b1bab18e053c3cdc4d5a7f0f394d14. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMCE71300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b652e866028395a6d2e2223a97ef39d46e7f981174410a9de9435e28465e032. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMCE71300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b3278d576391c5b959f271a0925e144df269c5cd641288ee35ab346f1aaa5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:46Z), 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/QMCE71300223.