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 0x733b2a1b122d27d35b9dd12c66d46fc1a25ce7e8bda94e3ec97a868ba297fb8d. 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/fa3fe290-1636-4084-8408-3245b5cca698.json and https://artists.proofprofile.net/proofs/artist/fa3fe290-1636-4084-8408-3245b5cca698.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 0x67f7dde283c40ed883bf159ed838562abd3e6dc826b2a9139c63637aae6a7d18. 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/BC8DD2400044.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd031e13b42f577ec37455e5c3b8d33ca13ef104bb7ffe272daf3a0d3907fe. 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/GXBAV2202879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9983e0db44d0c62f294cd6bc45de1f237cd2a7602779db1aee72c727bd9ea. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJY2419223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4991e3f3fb7cf7f4684ea4a68b97e1f5cb2219bcda177a0300f9a97960b224. 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/BC8DD2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf729a3ef52568c9e46aa7ca6fe47ce98b3d2c4132a440eabd074981b73f0863. 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/BKKWW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8bbf1786ff701b2f0ce4a48437d7f2008b0633e5efdf0eee41007818ac8969. 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/BC8DD2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9c58c59302a8aed9e0211bb7037e3f3824b380a8f922f6468c9fd883364fb. 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/QZNJV2493055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf845384e1c389250677b0b8686f87711c1a61c5607f7c3a451cb30a9f8e64a40. 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/QZHNC2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb305fb954a0c034a66bbcd3ed83105bcace11a6f158ba259d26fc4cfad7f097. 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/BC8DD2400025.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f263c34b30449d21748caf3697def859f6e2f450d34900721e8fd4c15fe690f. 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/QZNWX2206727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f5214ecf877cbce993950d801cfdc221bd41b37b7a79630e4f520e8eb2f53. 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/SGW502461238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e1649b16fb47abe8d8ee4871b8c858e6d894197cf745adab7b7dcf6db752d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGLS2480920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2cf6691a1a0d348376305c81c0bc09ada34ae16b1ef896aec768d20ed7ab8b. 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/BC8DD2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80032363f732a24ce2f88e43597a7d791077faf4ec1940449d9569d642e67691. 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/BKVSN2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeade82ff2700da4b5ac0e09695848d01e5363d6e5c6d8c3d7bbecdfb724164e. 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/SGB502428366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab26f56ac381622b7d2422f1950c94103096f268c4436d704216ac4f639fc31e. 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/US7VG2463893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4932a77f99c74681490926fd007dd94893ffd4a3f131e8f5e6cfad38d714c0. 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/BC8DD2200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d79b5622dc702e7c748fc6dcdf9926c2b9588b84594c129bb6743c74f5924. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BC8DD2200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc02580cb3db0db414d23f2d513f1c15d2cde986b6dc9b2d1b8a276f158c2d2. 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/BC8DD2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4323a1b687a15590ddb7ea4ac4f05dc8694f30965bb13b2bf226ec520799c48. 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/BC8DD2200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3561f92e5512e2ff614539598d60f0c74962d8ac86afd3b2511955f4a734fa2f. 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/QZW9L2332575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e77a2a73a247b1086817780f90a5dbdff1bc3c4c676da5197aef8915479e5. 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/QZHNC2213311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f142ff68e66c30dc4700da5583aefa2e63e80185acdce2506bb6803fa74f9eb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BC8DD2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8649a7b5aef9699bed2856f1d3ca1d9221eb09d71e9bb0cccd2ca5b938013fbd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US7VG2578499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed4e15140eee488aa056986a0650cdefd870a09ba8b5b41253b1b1f33153142. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BC8DD2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc570adff45c9e176df8637de170600a17296f17d396e870b2f08f102d3bb3d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BC8DD2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7489e7f9c0ed2d6af664ab2f45e3b917fe9af04cc10941a1c8ce9b12ac0a45e0. 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/BC8DD2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cea4690a0b300ccb4f934c2a2f68f3a72f613338d319a9beb16f6cf6c1b6bf6. 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/QZZ8A2428107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d96cb68bfb29ae34e9819372089c202b273648dae6e83a3f1ed222cffd9c9. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BC8DD2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b4d563bc52b744837ffa49b4e19bf8bec7a6867c6798259b552388b9a83f8e. 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/BC6M22403407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965924a4c2af1e882b1b6d56ffdfc6f8cb639a0ccc93a9b532e8f49e541de50a. 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/BXIV82463916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe382c3b61afe9497d91b9ee902d228ec67fbebc71f479f4c59325040ef771179. 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/BC8DD2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883eabc10612415afe8909745d13176aa719eab31fdd1780c135daf315138740. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNJY2495791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397fc03dffd16253dfe0d8052fbae1c28c9f80716c3ce7fe726f1c30a416ff6. 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/BC8DD2400056.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd031e13b42f577ec37455e5c3b8d33ca13ef104bb7ffe272daf3a0d3907fe. 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/GXBAV2202879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f47ac7414f9ffe49b633e55102b8c8eb49995ec01e6b66d67fefe21f8e37fe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJY2495890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087504a24b75a7539816b3e416cd2febefed16d0240183dc1273e83253b8ba09. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US7VG2578532.