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 0xd14ccd1c76a38398e6f3068960e328916cc748a8d286babee927f8e261fafbe4. 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/31da0de0-3d27-4aa9-80c1-a19047517c50.json and https://artists.proofprofile.net/proofs/artist/31da0de0-3d27-4aa9-80c1-a19047517c50.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 0x32b2308099492a1a50e41b97af5100e2bc686818d287f7d98ffa649eb1ecf794. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES71837225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b49544637d8be2c957170b46408f6832846a77b81e642e94d473809b171ba45. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:25Z), 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/QZES51818388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c0f0e2d2f62a3e3238ff9bc2c9dc7ab6ad11069736955e47cb3ef38788851. 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/QZES51854466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af1605c828bc96bdb17aae7912f6ad2ef4bcbf505863c0dd0bb0aed91c6b2c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES51854468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e57bef689fe2fd1ae7c8a0a5db056bbc5e1ec2394d0f1bbaaf02898ba185f1f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES51854469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ae4f4b0e657dba5efc032d9520bd17935c4c70697ac57d1fbfa88ec8927e07. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES51854473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c0b59e9c5461b0e51317ea7e3d9af1a496fd8c6a9703b4a76178e5870de690. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES51854465.
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 0x109a5e3b51aee2c60e54a38989b3f88e77d38c05fef63e81ac5252e842eba9be. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZES51854467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fc110305569976e101c57c55d2f25d3db1689746446f6bc646928b18c4417. 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/QZES51854470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27afb5d9e44392037ac2d056e287edd60f27d284d90b377ce262747dbad76c3b. 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/QZES51854474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aab17ba9f067b52a35ab6a6bc86180594efac9e85b0c1504bcb704a4c45252. 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/QZES51854475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4219f601e95a6be5760d08a18da34cc3f6cbcba81d2794cf7fdde7f9c7087b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHN52040418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8edea01c0677cbf19b6e4a153c374ce442df317af228630ef2d9e016320ac. 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/QZRP52497225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c747a8d3384e250440abab4d674c58c4805c6a3bb29c14caac9499db64b6f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP52497226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0101f586d0bf08926b6c3ccb6f25957fa76143750524742399853a49c0bc2323. 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/QZZ7S2564580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca352b5ed3d4965858d2c8d46c80a8e17898b90b1ca77f31e9393068e7c443ce. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7S2564581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8da2d4ff0db6a25049e05fe6755c745fe91bbd143aa4d2059fbef9fb1bafe. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7S2564583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59388b4080927d045b24a25572529b35c13ffdcfa2b1a1c5031694c33c8cb325. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7S2564584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d102db060d69f7826bbf625013285deb197304791176696a6c9b89ac6230c1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7S2564600.