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 0xfc39b372fa6160d06360d3616128924e0b029d344b04c3155a3eae6a17690be4. 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/df76df6b-47b5-44fe-bcfa-628ed57df599.json and https://artists.proofprofile.net/proofs/artist/df76df6b-47b5-44fe-bcfa-628ed57df599.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 0xd85028e6a3e56e5d6076c3b3e3081fbac62ce0ab2adfd3c7f60260ed8f27e49c. 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/QZWV32410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6493aa61b912c0e0ac091df444926a6007bc4bd59835890229f06957a4e3be69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2461680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad06465309af8d5b492bb467e6c1679b58887fca99dc47020695b5567aed6c12. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCL2K2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0704ce94cc74ba2169dd7fc0584e4d5abf8d6276bf0971f4a80dead66b0ef. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BCL2K2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1568a6890655dede0eea518b5a967e7fe34297ee5b5caf814b94cc0894863ba3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BCL2K2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28911fc3d7e9807bcf97a5fefa6ba1fcaae959519bd22acf05cfc88a85b5fd6. 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/BCL2K2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54edf043d99fed41f7615cb679a4f6b4d57394daad010b2ca06acbb676a527ca. 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/BCL2K2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3c817b9a9bc84c2359f2c887c40b3b192a412869d552d04da775caac1a1954. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BCL2K2300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4adf923508ad964d91990b3743567a16a13477b19b23a48f3261007f563c9f6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCL2K2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9553743624654f024a4d3640a51baf3e247e567f496634dab980d110f23ddd. 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/BCL2K2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b99fc29b34de546620d0302d26d576a79439e85fc3c599aa6b657a2d76f4a8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BCL2K2300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b52d1cebbeb7fcb949f7647f4ad32b66046c8a9588bf35196845de5d31fa324. 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/BCL2K2300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b0b12bb56df7742e03aae743266807a6a83e7d706ffff9187123f6fcd5550. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BCL2K2300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc6a6801afdb4cdf7d440afb21b66cb635adb4a32702862473b3c70aa87c7d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BCL2K2300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3624c94aa8479058f24893db1dbc3e2d7346c3b1542f9e16c8f55e7a8bbbd414. 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/BCL2K2300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0926c9af99445b65d5dd220b8a96698513fc5351dbad64af47eccb8770d1a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCHFD2300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0023c3ffa49d7419a76dc31c6b9cb0f22a6b6193ced95dc7814909cbf97224f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BCL2K2300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec06903355a104019796aeb5a2ff64f0897907b8692f9decc539ec74c83b09e7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BCL2K2300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb153171f69f74391c222ce9075795b28e5c652786e3eef554363d890718f9d. 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/BCL2K2300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96e9f953cd5c970fca744aa64aad945b46990a39291cf7f090891cf468b27a1. 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/BCL2K2300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae749a7f724a50fa6f39da0d7d2842ff02a7885403ebf8ca73e497559c268d5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BCL2K2300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352a4aa973fb6e4acb17f5e9369287a39cc10a52f7aca5e24c9152c38962ef38. 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/BCL2K2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aa16ee49fb28c437b716ac10922324e260a4a1fdcc638dbaada7121d770d70. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BCL2K2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56ad3f2bc70b83796c2ce6a2edaaa960ffdfed10b44b7684953132b7204874f. 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/QZMZ92369440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311cde0bd1c4f9263204bd4001afea3099ef683987d6a027073800620ab133cf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BCL2K2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecfa2792e66ef1af4b73aa51e09cc2e76e6e1da3ddcb2f60e5f72dc9fc9c2bd. 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/QZHZ62223321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291494f49c63395000dbf2cad04b10713b5c37377aecef79f151712b4bcb206d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZGLS2293180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd2d134360557683c6b10432053f674c649e257133821f8e8aa2d9a1ab419e6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJX2160518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d7d3b7eb5ef7df8cb4281bebaa064d22f2e1d7dcc42eb8e77728a68a3355cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92520241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fdcb010e0d441d69a4143556fa6dff1d90b4b478a9fbd09c17438495567199. 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/BXIV82424243.