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 0xa5c58b78aba90d9864dcf254d09d24b69e7d8292d3df11610b783137ac297c5d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e693cf63-60ec-427e-8185-173ea0c86694.json and https://artists.proofprofile.net/proofs/artist/e693cf63-60ec-427e-8185-173ea0c86694.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 0xd8b1c1cb8e148caa68c75010e4b880faa0f0e5ae7f92160a3bc3860286c52564. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA71327408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63721a74ff3005a9b01d869933d76151a0c5e04aac00e9f0668b964c6e7d3690. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae63f4144cd4e9d5cd0697aa1a36489c8dfa469c8c8147b32bbd4f05f76ecbcd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA61374358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32308bf09f90592ed5d2d8246f01a0dc58751fcbb9fc4b5da1ab97443833a94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf3d422589157d709250e04769d5e4dc9134422e65efdfa6c219b15defb078. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9949aec4c732e956cf5a7a79132bf809066f0a8aaaa15b151a91783f7e6a8377. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMDA61374167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0f0015e032c0dd97d21e6e0e7dea948a92e772d1d02cb1d74e67becb49f6f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49148fed580d993517ef63ef4fc5dfb09b6fbf42fc7af71757510d567f6f52. 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/QMFMG1341653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378ddff8372da5e0b3e056d634c0808645a3d9a5734a6e40915a1b8c01ed7bdd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc75fb679a82f6cae54ba05f5e38783a01d6fb10921fb96e68035103889a30b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7098734f36d1e39c43d0d40bbfbf4891d0fe3909cefae05d2c225da827743e3. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/UK2JZ1300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb196a0e0441e46952dbbb3e320ad672e26033b4ed29ea02af3cee7991230302. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/UK2JZ1300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4b131529d66ae926be6fc6874462689489619eb9db6a9f1140372603d3fd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61374311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9949aec4c732e956cf5a7a79132bf809066f0a8aaaa15b151a91783f7e6a8377. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QMDA61374167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c88dd65ebfb2661e1925cf788760d8f0ee8db303c1af30bfbe2828d6704f6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UK2JZ1300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3661ba4521d7a87bc5e5d2339bbe1cc9701009500bde39856c0786769c466a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBRKQ2139462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28108b1b5414ce86aebc7f31ca825673e457c940e6330cf8046b2c65a4639c61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA71327426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045b6a1407934503b1bf74f79fe1968e7ec2d7ecd6b67efca845cf92a46d264. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMDA71327427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be0cf3100f8e03cb185b4fb12496c98efd443f80a01e844269ebd4ba5fe4dc8. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMDA61374316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5551b16bf2bd8214084e94c59353037348d193374f15ea32e8310f618f4313. 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/QMDA61374317.