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 0x478335ffc2fda050fe4e47cf9ce7812c7fd02dc8897938a5114cf6ac35630aa1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90544650-46a7-4771-bb6a-36cc98f28a45.json and https://artists.proofprofile.net/proofs/artist/90544650-46a7-4771-bb6a-36cc98f28a45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc66dca18d581ecb59169715a62fad476ee500b157bbd6b9a49e19db5849acb72. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FIVDC7900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf1df0eaee69c3ef9dcd0f023102901313520c6ce07f2ff2c8d29c0b536cf3. 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/FIRCR1700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32804524dad4c11e87e5fee97cf7e78d0ed07a8e6688396f09c873dab5529f. 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/FIVDC8300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8614bc415099bd10aae8027c601ed393b8345bb24ae8c8739c34e745ee4fe01. 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/FIVDC8300056.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee047e72dd4ac67c588469080f3a043f8fcc15239bfe3cb4e582c26f8eebe4f. 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/FIRCR1301801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa844a6c05259fe24c6a97a01ddb03d47166f4e3381810ee5c1ebc9aaba873f. 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/FIRCR1301829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc568903e866b44f47b9cd604caccbfd0db7836e79ea9db694c075c736217e. 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/FIRCR1301830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6f79d655dc4376c06f60ea3af28e32330edb2343a40b399fe894e9766b08e1. 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/FIRCR1301806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1af08ea7ba4facbf479fb5df5050dbe0b93b7cabb621fa9c0f1b423d33de31. 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/FIRCR1301831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1918598a1cf40e6b797ec0291a98550ffffd131a0e3122fcde881df95faa92. 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/FIRCR1301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6f0c197ada297d4a389e1ae417a21c3b655a4f08ce1be0dd98dab61023d38f. 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/FIRCR1301834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fc79760a9e4a2069653b61377ba1fb95300c47255833ef2f2787e46674041. 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/FIRCR1301835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8349bd6d6ab0263987a7d4dbe9cfc5f8b21ec6c71ccee8c551d955e55a68d64. 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/FIRCR1301812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77acf66478f289247fd60a11979f7c71b84310914192c03e29646753afddd70e. 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/FIRCR1301837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18471ef55eb8b20e3384e89bddf73b9b2b39ca69b39b364d792496b9fd60c083. 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/FIRCR1301813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f5d4121a38ae68c5ea7238db7a6d1c22b25ae1c05503e241f4ba526986e9f. 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/FIRCR1301816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308d6664c6d9f9fd21f8a94c42ad2d4e6b53c4d06ad3c64323493c32f403da3. 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/FIRCR1301817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c8decfb5979e97b62dd6ccb5864e28b0115299dd2aef816c1ea1ba7c44dfc. 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/FIRCR1301818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064f8ffd51e4e764830e7608c1341286caa4bfc4c1086ccfe79e04f078943ea3. 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/FIRCR1301822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a0f9bff0b742671e941fdc1bb1afd4147838ca20bb384ccb165c71cb61007c. 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/FIRCR1301823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c20b981f680fd56608b93d4b29bfe03d2871c72a70762f7e8c1131a9354c9af. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FIRCR1301827.
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 0xccb83f58e1c0d5c1283637a4990091ecd3ed042ba11df9840fcd6e0fcb59ab85. 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/FIRCR1301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5670ec68a76a2de97ee5d9983d8d3367f3bf4276149460a60b44ba5a62bd3823. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FIRCR1301842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf181b3a89c72d2d1356fe1fa414944cf620e5d1b105a8a79ae83fa8e17902206. 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/FIRCR1301849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad59aadafa5e5ca2e768ea6957f1753af7d1dfb081d709a2f501dbd0d835672. 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/FIRCR1301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1dec7651dde78ea5abafbd1a97e70366e415f91d0afde887f2d5d3180e6d93. 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/FIVDC8600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecadb4858bfc9dd742187c9660f4198500df94af06968497c203041816b372f8. 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/FIRCR1301355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954e665d072c70e611d9dd058372441370e451fd6dfdcd8e9e0f995fe59d569f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIVDC8100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a65b8179824e074789ae58db55301df60f02ec10e645040302d3151317793b. 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/FIFLF8700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e1b068ea708b2305c1b6c27a35d72f4e3b6de3943591adf561397a26176b0. 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/FIFLF8700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b77644150c2b617d3098656ce16a25d4aa839694b1941f880fac2dbd74fa0. 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/FIFMF1244992.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b7da7db85fdd6bf2f14a3a6c151588a0a7fffc06c3609d6ea03dbb4cbe384d. 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/FIVDC8400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1dec7651dde78ea5abafbd1a97e70366e415f91d0afde887f2d5d3180e6d93. 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/FIVDC8600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6360a896486b08826b6f8619b24ac0ddf7d055ba95969152e85ed489d120386. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIVDC8700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf17baed755076cd7aab49b5555126acdd3e283ccaea1aa03de4075198acf9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIVDC8400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd6ed48055cd38c8687a59aa66e450ba873ae0d458151a3df072fd6c787e60. 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/FIVDC8900004.
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