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 0x88f9f6e048cb1ae9c2cdb1019dcafb5dae06e7be82f12a5cd4d6cd5a0477a783. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fefcf83d-c84c-4d31-8459-2013b1b99cfe.json and https://artists.proofprofile.net/proofs/artist/fefcf83d-c84c-4d31-8459-2013b1b99cfe.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 0x5a5b18efb44ba34cd0082a045edeaa666913dadcf88a8de7cc09c760ad3c5619. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:35:37Z), 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/QZMZ92448202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64acb05af25b079c41484a77f8faedee07227340ab0e4a0ae52b7ab0dcd986fe. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZMZ92448206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b40cb8491b9bd2944698523533a54545adb16773f021df9d847728834cde835. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMZ92448203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1531490ba3f181e8a100fe3e339a8fb383e26cbe2db6e66fea727b83a0d5fc1. 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/QZMZ92448205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c64aadc3d9904c6611245f356bb24f870f96accf92e6bc19f6687733cc6b27. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZMZ92448204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd37eb41dff09b6803d5ec784a1f5d85ffddce6f372468d74acd18efc70b0f. 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/QZNJV2422650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea20bca35276a4c2558606ff05c022502a6526a4400ec1245cd1e7e883cc1c72. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:31Z), 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/QZNJX2407182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8806e2db2d7dbff637b5e46b82b403097ed5f1d47e0791262304a1240fcb6cf3. 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/QZNJX2494130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5417561973a3e2bf7b34c30cd7f8d553bac715466ce24bb377487dac6a677613. 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/QZW9K2416719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b0ce01b9edf9004d90b4eb1ae4792e4680ae855d641e5422c65da5c530aeec. 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/QZW9K2416721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2505a27a867d141783b7b9e2031393d1528b1fc789530ed6baf1f2c868710df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZW9K2416722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ece450ed7452e89025df2e973eefe29518d2a134ec3a67cdc97190f733a581f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/US7VG2520098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894df55fa54c70d08d9e4669331e14514857f6484b67bebf7952d585ad0b3e18. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWDD2561176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad03fa7937633153915427ac2f85524ba3fa7a2c6c8bdfd77777f31a3a99375. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ8A2529183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98778f43399ff81e443e19ebce5ba002a0ee6de8bff2221c57e543ea82cf0f7f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:07Z), 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/QZZ8A2545586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497870c7e2762adf16bae654c7ff9d1c6d62d5e9fbd04bcde1bf991d211ab7b6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:44:52Z), 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/QZZ8A2579544.