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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d823a2338ce04b7b05e292807477493ab8d98651fe4e7ff31a923769b324a. 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/9d0f70d4-7926-4f62-9ec3-f1351fde2957.json and https://artists.proofprofile.net/proofs/artist/9d0f70d4-7926-4f62-9ec3-f1351fde2957.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f29594b1800808c6e81020543235ddddc93632d46c379f331eddd74044908. 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/BC1SN2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e2e6978daa24e91f54118423330b043cd2386109f8a9ab7a27d6e62244d28e. 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/QZEQU2052249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7915aded64b581199a5cbc8872f93d8639f403f503f7a165c43aa9c2b9eea401. 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/BC29Q2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7915aded64b581199a5cbc8872f93d8639f403f503f7a165c43aa9c2b9eea401. 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/BC29Q2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018f9e6fbc16f99cfe683db53161cc028d7679d946a80255c38e72d03259b94. 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/US7VG2409634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db990334fab4fba99bcb6ae6b7114ffdabde7deac3b27f501e16e8aabf9b59b. 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/US7VG2409635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52342fb65508bd5a0611d04241dcaa97807e39ac602b11710ed7ccd463d352a. 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/US7VG2409636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7466836a1186242e7c608adea315082c73360fc40c0ab42b3a8a2b8423343adf. 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/US7VG2409637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778406c173af26bbcf020e72fdfa2739ae105d0df02ff2a59ec7dcfcde421baa. 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/US7VG2409638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d16f0752134ea3d45643638794931d9f4ac5fd43c5ec09fe53e1055fbe54b. 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/US7VG2409639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c21f5653a1141282654cf7865e11054551478e5a816b674bea6a462842bcef2. 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/US7VG2409640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5dd7cde40f8445eddf8d63559f192de8ef67e95be1ffa6e7a17e5879fd5d49. 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/US7VG2409641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6819ae56c98c9c94dfbfff144a6a60f84e3100974ee71ff6159bd858394bf38. 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/US7VG2409642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31226b651d4e5cf580ab14a637a2ef812ac0599f420c49d4bb1215331035760. 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/US7VG2409643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eaa15535cdac99c1fe112feec55b6434a9a88e31205ff4509dab103f01382a. 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/QZEQU2038887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdf53436ada3eedf9d2524751f231b1610d189526e7648df8227467eda28328. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZEQU2038888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a01586262bc14ba2fff4d68a96711dc57cdd174cc2aaf6e2dbe94d3c0455d3. 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/QZEQU2038889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77f2b9229f4221b4cabb94181cb5bad4bfc249f5305c8ccfbc94b37bd63df6d. 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/QZEQU2038890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a24c4b6edec1313a31ebfb79978590a0838659995246f237371405d29cb5f5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:41:06Z), 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/BX8AE1900204.
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 0x18255a32ec9baf7f4e165a85beaf3ac292da8c5a61465997a82a2f52a5fa8e12. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/BRJLS1100412.