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 0x6137c31f3d0f112c71d7e74538ea61fe7d490de484c5161029f23d72ed9833de. 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/fbd33842-c02e-43cd-838b-e90ea13b4a8c.json and https://artists.proofprofile.net/proofs/artist/fbd33842-c02e-43cd-838b-e90ea13b4a8c.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 0x5d381aababd024748c6303633dd5928f2ab481000d5aa5ed1df264d5f8e5ddb5. 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/USUM70506945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09de3595e5cce34f049e9d6a2e551ba46d649d99681603f81fa194168e614c6. 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/USUM70506946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070e2b27d552f0cf77c8d324b88407998640f49b88e9f99eb5ec76afcc285323. 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/USUM70506947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9622a8f286c19394616fd644486b04fcc750ab65358b0e758123ce632390ab3. 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/USUM70506949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc415764159076a59770206405c15ce2effb957847b762fc71bcb0768f0c4. 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/USUM70506952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d3b75b74757f03b0411a762ed0d3a140921229a4df776677c22f47d825fdd. 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/USUM70506951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95109dff070b3d13ceda3500f85b6a1156393e1684a602f0729d8d9737c6e5b8. 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/USUM70506953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af3195812b22e66ebb52a549a8b4986f3f4c383ebcc49c6838011ade58a520b. 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/USUM70506954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519c05bdaf20caedd149e5cb4f8ee677433b6c6e9910f9199e5e5f451793089e. 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/USUM70506955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c833b3beb1c271a67ed7f7811ed91313b3ddc172063c9285c4b6d0b7d89e682. 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/USUM70506956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd99622baaa5f5b5cff41822d18496c199ba3df8a7e401d91a60f8df33be1b. 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/USUM70601317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ad135d5793495dcba54018327784e979fdca248847ff065dafd1694ff130e. 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/USGR10401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe9d0645ed26ae8e0c7b75ce34eb117901369c757721c1b15c970223e674e9. 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/USGR10401278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b70a752fa3ac8d2daef418eefd8944ba9812ca059d23a94270606e4261db4d4. 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/USGR10401281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa2e2341827d1e3684c0210b307c7ba474913c5680a410153f50c0afdbe27d5. 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/USGR10401282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a328891f52dfbcc2fbb0dcca7a211dcd4cb255e9ad596fa0dc5a806a37f78. 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/USGR10401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e296ed9adade914fc77438c878efe669dae9732afe43e8897d040a11ce0da1. 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/USGR10401284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee456bd1ff253e7d3c4ab3205561f11616f62eeced4b0aabfe94ae43bb4bd7. 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/USGR10300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a678828ea54b83631d5bd07950e03de58d444ac7c78ea191ac25bbb3cf1ea. 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/USGR10300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51907ba147142b42db72d5287175e0e01887e0524864870bcf2b3500a8501431. 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/USGR10300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92644a2f7ba51db0dbe0b9e10b465d5ead4413055f5517876afb13f43c2da5. 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/USGR10300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e3dbb9d0782abc2b6fab476758727e76eb7a53aecb57b3e31cb37f5986ec8. 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/USGR10300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d971ea161fd66d84e50aa469d05113e16184fe9768d0eba1be534509d169b3a. 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/USGR10300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96187f9e81a8c9ad2ffe86087e0fe469d261aa706ad52f1ad3ea4040be7c7ccc. 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/USGR10300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3680bafea0112f376836d45dce4bb95d0b033964ec95374750a1485fc70bc27. 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/USGR10300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7fb1c7f4afd5a81d4bb0bdddd86ef5662f8375d8b0fa92cdfadb165ac92fd. 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/USGR10300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68883dd535b04d6aa353c05590c47facd242e4f5c6ae9c69cadd79368b19f5b2. 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/USGR10300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feec89c996014c1b18736891201f898dd2999e3a9cac9ac2e3e5b0f9105642d. 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/USGR10300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40bb0b10d8124cffea3f9a672ecb49f21bc437fa78d77f8adc731b73c432be6. 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/USGR10300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ff3ea80490b7296396f347697a61a43b6b783fb5766267ad1efd0b8bab6f4. 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/USGR10300091.