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 0xd878bac775f6934abb0841e603c902802ad26bb1bd782e8118ae0a8a58a07bd7. 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/9960a519-0924-48f8-b07b-512edf712c9f.json and https://artists.proofprofile.net/proofs/artist/9960a519-0924-48f8-b07b-512edf712c9f.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 0x8d5c41e2f0c3e669dbd9c147520ffd609a01b2e9fe36f2fe94d6198ef6a888c3. 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/HKG731875507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8e16604bedb562c6e4355944e4ce817b70be603feca1ef52d7205c008fccee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG731875508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75e57d93c1ae8c6bd4a597866df2a849992d085693f29e6291ae67956d88047. 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/HKG732137323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842e5f21886a65e2df282e6bcb96d09fe4da190132b18ffd8f360b442fe1825d. 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/CNUM72200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74952f6c09ea46f6279d382b103a3b8b198bcbcb659da27781dd2d9d55de40fa. 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/CNZ632100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23051338085c5c89efd4514e2a7b192c0b42635852837e92909573b45f9dfdef. 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/HKG732029245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08b1e0054663b89ae478a2628fab966816654a2fac4c923a2aeba81e80edc28. 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/HKG732000953.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7613833dae4bc7243199a79b7dc389fc8616f3ac071b067aa410f30f6a47050. 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/CNUM72400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05fd26bd438d301943df7b537cc22339361b30afd97aee048d0615c9547591f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CNUM72400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08659d50f708d57b8ced0d7ccd8f4dbdbe128cd6ed09f0dedd4003420ce9ee05. 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/CNUM72400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470f025525a6933b8ed82625616daa9297f027068a8f4a8cb68f7c363b568d3. 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/CNUM72400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f0489bf54ee0868967b6f94a691a9ef9c88de6fea7e35dadac5b074b11d787. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CNUM72400202.
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 0x05f63e77db89e6c0f7d05a50082c60f57bc40f1d81892ebd9adc9a803b18458e. 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/JPPO02300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cbf9dbca65857b0c871268338753d885b24466c9bd487a0585bdf3a9ea9726. 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/CNUM72300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. 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/CNUM72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ddf766faf6bf5e98c2aef961014edf5de25495e863bc9f99765df71a3e4cc6. 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/US67R0100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f6a4bbe71cd4418451c74618022540e6056b48bd7047672e4ae870a581c6d3. 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/USUM71900766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d2f84215b92639b2c53d999a141891fc94e19e2fa72c7f3527c0ec67bdbcdd. 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/FRD3G1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a64fd18c337513dd903bbd80f4fc19363f77af74c8d0b2a8207cc8864f5bc. 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/QZG4T1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d848486fb5b9988774787bad8dca6132b7ae442829a93527d2d3ab25526c50. 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/USUM72307949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd843cc415eab988c5811d7812e2c868506a67b3c39c8b0166220471f5fa871. 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/SGA671412004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea116bda0c52082acab8493593ebe20501d3c4a23e81969c30f0d2590b39b99. 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/SGA671412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a308349b9a861a99590545eec9dfffae846f75639a3e5d15608b80b4af9bd5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USIR10110319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e92a159d9d51fffa387b6dfa60a3677bdd9d96d5b774fc8b403690d61da117. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUM72206227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff220010a21d3a36542a72966f1d3fedd1e2b7b0844b3446a18f76d4588626. 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/SEUM72201638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9f59fe86adeccfc02f3dafe805ed071e5cc71637708464142c56fc0ef33546. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUG12101243.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cd60ee8366410c44da853bb05786644eef056c13d4926a162c3de09747baf2. 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/HKUM72000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd843cc415eab988c5811d7812e2c868506a67b3c39c8b0166220471f5fa871. 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/SGA671412004.