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 0x1e4035c147c30229667fdcb2e1cc21e2d49831398ce96f09ce6006732630b3ce. 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/4bdf0fcf-d69f-485f-90d1-da0e79670502.json and https://artists.proofprofile.net/proofs/artist/4bdf0fcf-d69f-485f-90d1-da0e79670502.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 0x19d698e8ead71cbda06c2d1bf8b2d480f0a332ee7a2d099e9970c7f34e33d619. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:15Z), 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/GB8KE2208759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619aa8ed6ac2e03f9be064e4c4f0236c6c63d49829f846c54cc324b2857b975a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB8KE2300665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22348ac212b9dd258ff0fff7826f5cb2006520ef28f87cf132b4c01ba6d0652e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GB8KE2300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c99c2f2bb33da71a05e490cd357a7cca6e7d2aa433b96e921f3aa7ad9cce94. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:10Z), 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/GB8KE2300667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678176507b7490bdb38ed6f1f58fd7785135760690f7b9db83df7b04b10e9357. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:19Z), 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/QM4TX2397023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee592d7089c476dd33e613215758c9c834aabb5b730236540a0b1ad6c79a772d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:11:38Z), 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/US39N2309072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbee813b953d001ed7ef4682d0cdb299477ac9d827e77ed57a48587f3daac4f. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/US38Y2400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c5ff0388a0e5482b20bad864287b7bde442586f5939d1feb98206b70e89da0. 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/UKFTL1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c06de70c757068a2777aca266d4c9e7792596a7639f3f0448f87b810c54f7ca. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBPWR2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b25d120e5227d5ac8dbf512a75032621165ec4d83c8ac49037a83963bf6cb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:41Z), 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/US38Y2413776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b491a61dfb59994909aade957a5a5e06144fcfe8abde17a4858bc5b3b3c9303. 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/QMDA72416210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbed41a98f78a65239793bbbb9c2bab188822b3c11f1d1b2ddcaf163c52bf61. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:35:22Z), 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/FRX282599294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689e2dd8552f3edd5b967118cfbd255f684075f049fb93db71553ff82761a9b4. 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/FRX282599296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa4edd156b167c047527ae676c24c9e732e994c4f92a5304896f8723588d82a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2411507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04afb199251d5afbcc4725bb1b83ad7adf3797be98dc84a1e9cefc735c9d6975. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2411508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00c3de26d5901d11c56fcf5678c23d0b4779094a925da33e63b513e355c86ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2546867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b46d2218256333e7a07d12e3fb4fd5c138a4fb646401cd36feb6814a34ff2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42588936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b46d2218256333e7a07d12e3fb4fd5c138a4fb646401cd36feb6814a34ff2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42588936.