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 0xf4d637c2921014c549b90855677c36554984d960b83570b1b1ec07214a27416e. 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/6950dca7-25c3-4ea8-8d98-6147248d3b5b.json and https://artists.proofprofile.net/proofs/artist/6950dca7-25c3-4ea8-8d98-6147248d3b5b.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 0xb3b4e16d5650a554df0ac1c3a79d560de6f3abaa02c8f5a8e788ea2b0e9d922f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJG2554965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ee714ece1626086e1165fab74094afb13ffedcca3a5aedaead1fcdb099997. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAJG2554968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8141f5090cd63dcc03d221a9d9e5ccdf63e10ffd600ce16267f229cdfb9db1ff. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAJG2554974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb6cacb64244fb51756a8b6e6ba55109bffe661cfee62120f5fad87ae93a34. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJG2554978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f757ca9f3499779908e748d9df3cb2cf9359e188bc734ea7cca67f98e97dce. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJG2554981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c30164ee977b1c16ef5550d271e412874868503d9eb2c71f7a280c17bd72a1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJG2554990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429d83b2ffbf9192a515479ed6f3d124e85862d1d11dfbdccb7d987cd8996e1d. 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/TCAJG2555005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bd71d4d95ee549876484bc4eef874806caf2cb8e06cf6c811541dcb62f306c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAJG2555010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11804eebad66139000e7b844e3e63339315e7d20c20b2360b7cea4aed1cdfd5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJG2556233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db33ba679a9e8d0ddbc45bcd42b4b4f1336791c6397ecc4fb5e8de858bf94d1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJG2556242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e73c6a6b4230d3d0372c6ef924ae854521efdc63c64e123c3b79d9320bfbd6b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAJG2556245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8de046bd3022a1bf49ddb506beb1942fa149d42fc7627cbfaf05aa673c23b9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAJG2556248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8c24df6d2f9f06c966d1809d85f99cb4b86db11fec9d033eb4442492cfd3eb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJH2556251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc37ae0ff945e0c45149b0e50c35ed121940ed1838bbd5b9b6f0072fc234f4b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCAJG2556253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b35ec017585e6d4feeffbec25f46d14215c2c992058c54bd9c3a5172c2f38f9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJG2556256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904e12ba0aea5e53b9b74dd7d94d9b15437607f76fc97a4c6ccfa1fb41082aa9. 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/TCAJG2556258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb03d04e91d3745437071828eb0298824bde11bb00043c74ae1a645eeed2958b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJG2556262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138ed81f0251503509fecfad0fd4734bf4d6255cb33dac181bdd8823a664f44e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJG2556319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c2a8aa5cd6c54a6b6857c80e336b957c99d22ad5790f03082fdd66401f4c43. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJG2556326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0140f3e34d2411e4a9b2917eb994e555523bbe9b851b5e7d3049ce763c51a9c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJG2556347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1915d5fa9254835e3b56b3a9c4496d29bdecf00f1c7e68eb60f480a9f1933fc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAJG2556410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0078460190b418c1a7e5a0e04718d8d25a443397f40768256895a14af6f44. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAJG2556411.