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 0x57bdf7bfb018c8b7415698fc2c3b5dad5e64b3e14efb6f0c8750c08569fa72d6. 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/885efe47-a3c4-4505-b2e2-73e93be82b7f.json and https://artists.proofprofile.net/proofs/artist/885efe47-a3c4-4505-b2e2-73e93be82b7f.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 0xddb90a405b29dd69c94e672d90dd6c77828e341cb2fd3d3e93c286af01636812. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2313363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4880d055551ac6a733751724b5ad7a10e83229045390953cb703f756372ee0ab. 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/NLT2H2300855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768266c3f3b5b4447d4d74fee76208f60a0f1ab2b59e4ae709eb5754dc822c9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX202041452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa327e98dff2986f86d040c2399e69fbf07ffb5cb46ed1049e2235a6b38235062. 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/DEYT72000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000bd2adb5d9fb4140995206bd347f25b1a67daa2059a8a410134bfbce9db46. 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/DEYT72000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf070143018f2d4d68361e3c083b6ca275d5b7d1cc9c14ed25de6d7220ff5273. 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/DEAX11900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef46460f1dd2223f744c2e3c52d673f9e8b4c571b6c742d1c5878c4802d659. 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/DEYT72000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ae6794d1c03847c6d9d86613e5a48ae796849710fda202ab5e9c186c29a3a. 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/GBKQU2385032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bd1b6f1d1c52480e4fc5bde3db39774eadf0cfc022a1f30c5f4244fd6708e. 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/DEYT72200412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2c2dc8fa4e3b575ad09d348e4c314e2793e514f21978cd76c50794b738feb3. 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/DEYT72000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7eebacc210a692322fbf7ca85bc7f55d4057c8e8a29d81045b90d6e5bda5b. 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/DEZC62280297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13f6a24a6d4d03df400211485606677c6f251ee001df5f94f839fa3e9979bcd. 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/NLT2H2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3108f8811be2b2d716cb5415479bd422a5223d81dcf979d4670063a1e58a072. 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/NLT2H2300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482d9183e406e112b8f12b42fa8329644a17b5ec9d5aa5b967a0c1ee6e879883. 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/DEAX12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f381d04aaef9e6175c1ef06a83d672418658a45363703fcf2186603223fd7f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEYT72000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e662e85a8239c3dea271d00681fc7ba8fe5f702a70d0f1c24f023d2d2bb478. 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/ATGU62000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34109edcee4bddd72fddf82485c5346f2e2c0ed790dbfa6948c1148147c4cfe4. 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/ATGU62000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf138693d260b80c871922220dffa2d0d5cef300ea1d163107613ee929cd01f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEYT72100587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f381d04aaef9e6175c1ef06a83d672418658a45363703fcf2186603223fd7f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEYT72000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3000900223d441bc3075f34a365f1e32e8b27cae454301825d19193fa97ef67e. 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/DEYT72000036.