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 0xf73150f2eb8aac251f9ad405db6fbe92efeec65ef2b1c3154fcf54de00b21d2b. 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/74d71122-e7f5-42fa-ae02-0c9f829aa6e6.json and https://artists.proofprofile.net/proofs/artist/74d71122-e7f5-42fa-ae02-0c9f829aa6e6.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 0xe669676800cfe59340b047732b12d3d8bb4e32c820e1c9f00790e5519134714f. 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/ESA082200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e4e49c58fcee50ac1d43e68d530a235ba7d7727fe6998baa9f6eb44d26af5. 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/ESA082200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffeb515a5996d6864e446de13590df70503ea346fb6fd7c04af359c62c80607. 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/ESA082200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626455a3f4ef21c31aec89e3ae5f6f7f9c4b4beec7c96b1769fe5c86cb34050. 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/ESA082200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d3067dde4e49fba9d55a9dfe7d97ce3cd9ae8a3a7a9c7082034d1ce45a3fd4. 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/ESA082200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46f656d00d7a98c8fe44cd5bc43943f37761d5cad24b39fc952b1779048d01. 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/ESA082200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf950516b8b933d6ccfd47319ba2d24b182f21d22d25c3e2832a1e610da4a25. 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/ESA081802472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de1ca2282f19115ee0a2c2c6a05784d7f1c9c216e6354970993d8fdc19e4ac. 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/ESA081802474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe04c7bfde5f4ed6e238f2ef83f34fc2aed5e0420eab5e4a8bbd75ba8ab6904. 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/ESA081802475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3c287764aa4126068a7210b152bc48c0b0efb1607421825e5cfa8eb699c2c. 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/ESA081802478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b8c6f92788bfd6bd248b8f0f0f63857c482a8b7523edd39cbbd91d2e8a3003. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:07Z), 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/ESA081802479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4bee204fd546aaaafeca8edf1e55692493a62d9ee9ce46540cfbaf773af914. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA081802480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12743c0db52711e03bb585264bb3f8cceeb1e5a1217bf6f45e8c3fb672ca49. 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/ESA081802481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe725e20d4860a35937d1761df6a1982217c341d119932819c432f7666f104ea4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ESA081802473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9cbc6a393f685d6b906efad0d51574cef5c4be815f782b1017a67dd9fe2e82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA082323777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4d21cb5124e850371e091e130aef3bec98f291b26a67148c692725f0b4393. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA082424477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441d4a012f347a4c8129ec85b6dc39fdc9c808de54978ee6b8e9b03c1471fe0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA082400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441d4a012f347a4c8129ec85b6dc39fdc9c808de54978ee6b8e9b03c1471fe0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA082400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4d21cb5124e850371e091e130aef3bec98f291b26a67148c692725f0b4393. 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/ESA082424477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9cbc6a393f685d6b906efad0d51574cef5c4be815f782b1017a67dd9fe2e82. 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/ESA082323777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1da6dd194f3f7df0e5f7da08468d29c85ec242b4e54ac27865a7fe6399e7f. 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/QM4TW2180964.