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 0xa7545e37a4130e1a30583bab0991f8708496bd68644a993daf0e60ec9b2ed95b. 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/a6f448d7-c6a3-4dc9-bfc5-029dff3d539b.json and https://artists.proofprofile.net/proofs/artist/a6f448d7-c6a3-4dc9-bfc5-029dff3d539b.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 0xaa32b6b068df5543326929853a805b7cfde5d2f74fe60f5961b0e77501538a94. 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/FR8FB2311020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c076d11c7fbd0f1ca49283442539b3d005693d7e54d776167345b4ddd23cac. 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/FR8FB2310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d0d394b8524e8080ce9051f7bdb7248947d195afecad2d59dd729978ca6e55. 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/FR8FB2327510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd23ede42d9d190c5fa384524ff32fdee16c67566fd3632be7b3a24615d555ca. 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/FR8FB2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1be00be484787cdaa93cb3180fe7bb582d73f21861f7c54bfc7a5d5b403c70. 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/FR8FB2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f65b43de29c7c4246360a671f16e684795ebc96a7c4128a770c65fda3f3277f. 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/FR8FB2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6032b337ca6fa2abb09622436764e1b008a2b2093e4d85fcec18ddadbdc6c. 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/FR8FB2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c661d8a8e54e4d9185820f1958c1881c8c00e977f0d31ad145c951d6452f4. 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/FR8FB2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f63acee016039a01ec0e2212bbad855ff943eb209ac42dc6f52a60ce622b43. 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/FR2X42104995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435105184fabff8ec84a790e117c373661fd76fe6670e340426b6e5dad1390df. 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/FR8FB2201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb789091752127d26dca4a3c1c0ae1f14d81bd467d0c4217cf1d24efc1a1587. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR8FB2209610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e11f302934a2cecc2ead19cadcd6b0aa2308be7e07a6b12194b9d7b6897ad3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR8FB2209620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386b778c4343f4990b133911f60b1de8e568ef1a78d5ac1136522f3ae2bfd9d8. 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/FR8FB2209630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26db4e9351cdc1c67084e333cac4016e803435495193097e59b3c180393581b. 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/FR8FB2209640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39be8ed01f5a733e17e73c5d5ccebc46b5facbf5ba18de5e8baeb9273eafb66a. 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/FR8FB2209650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd090028988e9bcb924a0b68ea0af4cc232d89d6337539e86b02ff852cb6329a. 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/FR8FB2209660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5566225e12aa8e4b3ef015721f6e25c528be32c490e83d5bc40f77f9c0064a9. 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/FRX452164620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d46f898534d6069960a4237f9075fb379235d59050ea8df6a2c648ed78c2b9c. 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/FR8FB2209670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd23ede42d9d190c5fa384524ff32fdee16c67566fd3632be7b3a24615d555ca. 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/FR8FB2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c076d11c7fbd0f1ca49283442539b3d005693d7e54d776167345b4ddd23cac. 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/FR8FB2310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa32b6b068df5543326929853a805b7cfde5d2f74fe60f5961b0e77501538a94. 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/FR8FB2311020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435105184fabff8ec84a790e117c373661fd76fe6670e340426b6e5dad1390df. 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/FR8FB2201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5566225e12aa8e4b3ef015721f6e25c528be32c490e83d5bc40f77f9c0064a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX452164620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f63acee016039a01ec0e2212bbad855ff943eb209ac42dc6f52a60ce622b43. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42104995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5566225e12aa8e4b3ef015721f6e25c528be32c490e83d5bc40f77f9c0064a9. 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/FRX452164620.