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 0xe6ed245e06a1a274da6e70e00297b2304aaa7d65f85eb19a105f0f65d5b49b68. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b306dd7f-6b89-4ba6-a3d4-a8c8651af9d3.json and https://artists.proofprofile.net/proofs/artist/b306dd7f-6b89-4ba6-a3d4-a8c8651af9d3.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 0xc909eb238075b9a6c6aa162130176f8c6456216af4e4dda02a2e9b6287aef59b. 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/GBLV61925207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc04399a09642173bddd6a5d75782a93167fd7c6db07d3e5e3f4ea5b70fbb9e3. 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/QZMHK2058833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702a2182a105d2879e5f2699f1ee8ccbb578f9a3834dd0b1a493ff2111bf766f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US83Z2127759.
Some Say It's Just a Part of It (Simon McCorry Recycle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c42245b114eb0ae96540fcd7eb489cf544e1c46a18d41834b00d4ee1ea7664. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZMHK2226884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe060e3ffdc0c3168db59989f7278114ddf6a239fdb894f5af8342e7d89a0e725. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZS642252148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcbae31c9816a73aeb99ff66c9962a570242ba3f40a267dc12d45b61722a6a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHN2260772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506e3ba0ffeb7a7f073041a99903a7f431db51fb8e8335e193b277eef87c4e8. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QM42K2589001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231cbdd76143bea55b0566a763ebb07e192b286b3b48d8d1e9cdb7962d93490. 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/QZMHM2543073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd35dcfcbbd260ea4084fb349891f1cc5fb35f77f2d3ee03a0a4384fdefb2f3e. 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/QZMHK2553830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6666028023050b562a69e5709e864bd482c1a0ad8cdf8d5d653c3b230ce59. 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/QZMHM2572100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6dd86d964a238265af75d7617cf9fc2e5e9f0ace7fc0580185f4d0f6bc1170. 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/QZS652573980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5643fc0ce54379cde3ee3cfca986f960b0ab4d7d7098a6fef5fc6509f409d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZS672554907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15069b8fdaf6fd8ac48d356c10259f661c8180c56a02118459924af852f36838. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US83Z2126486.