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 0xdb48dfee4b8695e0624113e23db53e601e0a48c0065c209cac702251bc90882e. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d8a0415-3b45-4d2f-80c2-eb565d6840ed.json and https://artists.proofprofile.net/proofs/artist/6d8a0415-3b45-4d2f-80c2-eb565d6840ed.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 0xd86e48a9d69c6a7469e71eed677cf11232c97828abed1431f851a32296074410. 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/USQY51086106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a6babc1b6a981750172aad9a23bc7c77861a27f76d550b7e2f4c6b0f428312. 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/USQY51086107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fce3d84e47421240bff31854b08c8992f15ee365840a3b93cbdd444adfe97ac. 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/USQY51086108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f25ffdad73cf02c426c3d938295416dd969067c57a9dfc6a78402e703a155cb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USQY51086110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7286dead7ea73d33ba07bce54608818a9c8e1e0d48051b65784ba26737596921. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USQY51086111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e87b0dff06630c37940cd5249d11102013567fdb0c36871b62d51b5d5a48a. 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/USQY51086112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f81e6702c26dd6232f4a08e3c8761158be5b40c293ec5e754e1dd2a4973a0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USQY51086113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00f847cf3187423827ecb261e569f807dca4b4f790233983cb14a0ed4e24d57. 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/USQY51086114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f8c168af8dbd3664f6d567775d2abb6e97690f8f5e6e99d7695cdb2725099d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USQY51086116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412aef0cda98218cd3d5549e84b36b196e9e472ce690042bde4083a5afa0d411. 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/USQY51086117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89f5beb0380d3406ec1fdd69cb253958b4689d40d70a2a0565d0c81778ddc8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USQY51086118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758c7ec96cd9a261b0b61bd7851126fbb53e29c7567b7903dbfe48ca52fb73b. 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/USQY51086119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba288aed66b59b1d68189a7fbd065d520d35b24460f23bb879b0b8d18405d40. 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/USQY51086115.
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 0xa62116169a0b018f0832aac44163db35220468a3e3a2e460c038f91bce22f5c0. 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/USHKB1205101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e836c52b0d0d75e5c27522a78392304025816e059d7fb93d472e08160323e9. 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/USHKB1205102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e6728ef655c09b2d5c7d41632f9abfb70288bc8599c4aca45133a98c74e2cc. 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/USHKB1205103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457e8ef75ca4f1666d9e0e8e93a5917b184cccce67a6de328133459ec563a985. 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/USHKB1205105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f1bfce708611456c66fb4e831dad2d84d557ed777e98ffd5071a2c84d33fd. 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/USHKB1205106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b562548bf3d1b2e1c1edb97aab4e7b887b773cacee8ec796e39fe790f50ad. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USHKB1205107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b50434604da9342697f888a18e12605758c84f2319d99013548c411d33a04. 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/USHKB1205108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac9886e146081400c13b227ed7ca9db8b5ed41ff2e832fc81724e8f3e467765. 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/USHKB1205109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6258ecd0964e8887636b1c2610f8a1ceba4ee9bbabcac9e67dc415793d4c1a9e. 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/USHKB1205110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3756d3ae949be9c4635cafb0f5e802d4034e7c896ef202de090bc321c499773. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:32Z), 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/USHKB1205104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a90bb33719cc514d30655b0fcd78bf59cf44731aba4065675bc9fe1aa86ff40. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHKB1205111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749b31c81161c15b610a69e26a3b28719347d8cc518360bb6182800615d2736d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHKB1205112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3e4fe13fe2b779a339b9ce7f76b1406337903bd42f82745ac8906320bade6b. 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/USTCB0943576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb62fce4a97575a69383f39f17156d6eecafc776a75b7ab85c71caa475e7344. 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/USTCB0943577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32819bd1a3779622a4b39b5ab64206e41795edaccee984d315cfb63ce8a59121. 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/USTCB0943578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ef21b4c2dc3904a426d92163be5d42f70d65c75c292b029ab4e07e4b5ea28. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USTCB0943575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a646e72ab4da8f1702ccb58d255710e5c99bda50b14b299537fa146ddfae0f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USTCB0943579.