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 0x077635baa490d703d0360366c9a4c2c1ca5b940598575a0d257e9a8b17945f7c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78ee7288-7172-484c-8d16-9c1aba8d2d83.json and https://artists.proofprofile.net/proofs/artist/78ee7288-7172-484c-8d16-9c1aba8d2d83.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 0x60297eae90b993a969291eee0bbccd9e29a4c0f5f72989bad3bbd333c0a63023. 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/USASN2320156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679812384940ff152718186d98ec65863dcfc181fe44f9a0839b62a4fb337826. 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/USASN2320157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc855a1c9bf87525b46f2879d26b33879272e090f80764958ff39a34157defe. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:16Z), 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/USASN2320170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e64802d88f5d6a1fb3aaee0f1a1dfb745db0c4e1d6c79057967a0075b7e9c. 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/BK4DA2447271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060e51603ccf200e8af93e6f63ba406d5ff6c420ed4d239d63f5edf7df87bc3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK4DA2447272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f61c10caac2ffeeea9f0cb33b918567222f612ebabcd4c66fb13edf0f04be8c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:34:53Z), 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/BK4DA2447273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaac280a5ded00ea85616dc5ca4ebaf2701d83055d08464a1b65870414f84a7. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BK4DA2447274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1741e286f65dac09b887feeaf3f6f890108d9d8f874e3a38f18bc2f4dc5e4861. 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/BK4DA2450599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228509a98a4ebaae90b9433570e2b3f21d9fea358f4a99354f76c66edf0779fa. 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/QZHZ52245740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85b0b8bf9443306057b6d3bacb5fad48f7d442b9676bf49e6f9f6b49467c13. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ52245741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65271f798c331156f30d570fa3937d919b790ea8b614bd79ce7044b7fe9f1ffb. 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/QZHZ32271227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166223810f3d46a4537da4d354a2a3280d9e76d9f9299f3854c9a5635ad4431e. 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/QZHZ32271229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5985d435b7bfdbbc0747fbb05d9815a537eeaee7cf6fd8e1cbc73968883676b4. 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/QZHZ32271232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc84066115c7ae621b2a5680ebc0998a06a42f3826df6ef4e6cad455a066ff. 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/QZHZ32271233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e6a7aaab8e42edfcf65eb4552454279f91bc407e373f29678cc2e64021b07a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHZ52245745.
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