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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 0x86a1dcece36fe5445a7a21e715388f5e2fbfb42bc8d6969a53c9eae1869f8d56. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75747977-37f5-4fd5-8666-9e0acfcc5060.json and https://artists.proofprofile.net/proofs/artist/75747977-37f5-4fd5-8666-9e0acfcc5060.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 0x6371c09c7f92f8cb351eea7cb206ab0dbb4183a7adb83de25c29ceddcfde2ff5. 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/USCW62490901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44407e41a5315fb5fac174ab8abd780e59ae37294957c91d16888390a171cbc2. 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/USCW62490902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0bef7d2e90e6bb3a7f44d11b388c2c7257eec43d409afa780c496c822ef39f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCW62490904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f6079be97cf6bf5368c66266898dc773e3c1430c5ba4d7971e54694d22962. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCW62490906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d657a0ddc6c6282d174ff6735e5c3bce9902cd12ebdb98b10d7342385b983. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCW62492604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b99dc716bcef149629a4194fd5fd70526808d7fe148306a122ba1450c51437. 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/USCW62397903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ae3ef2f4920e6eeee78cc6ae6aa4ea6e78e7237b79389d1e051d75e34067a. 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/USCW62397905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37ef3dcc3d4875f10cc194f636147575a688a8e4b8af77305cc98927ec11f3. 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/USCW62397913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8f83ec5bf80f2b15ca96c0c0e0e1098c3dcedb60f3ba050e38c646e886bd80. 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/USCW62397906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd2a92f8cc5ad2dca1b5edbc2df4df4200456fda5c040cfa4b14f5b866372be. 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/USCW62397912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33234c40b3c7a86b64a0ca811cb2d42bc4e90dff60a50958310396022e2c54. 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/USCW62397904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6891cdd4aff20f17118ccdf388288e92471d66b7df30b01dee7bb65b4fe5dcf3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USCW62397907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd20075c9238060301200c3f31a48000c43820030b9e31afc2ea43afaa72f9b. 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/USCW62397908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561dba6d3713b0db15baffc0f511c572536af3fe399f3aebf495d505c011c170. 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/USCW62397909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d393a1581469e2eaafe453d4a5b3bb724ade24d0ad40dec5a75980b84fdd1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCW62397910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83a0e06c17a9988291d9ff0e1645248139a9fd95563d4bac29d3f51ddd9f159. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCW62397911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ef9762994cc894afeed4e4a59522587412a39d91c12477ee7ffe69e5d178d. 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/USCW62494402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863fa3b88a6f69fc9ca1b7d1c84005d45178c9deec5f5668e58b389228295973. 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/USCW62394401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42af616d591e570ca2b0329aafcd8b6b4fed94205a8f30aec6c8ed14ea8bdea. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USCW62392603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42af616d591e570ca2b0329aafcd8b6b4fed94205a8f30aec6c8ed14ea8bdea. 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/USCW62392603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e414a519bb7d66b6aba92ea7b3e57a2fc82260ec38fe3994ff4a8c4ece6e32. 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/USCW62392601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf40dfbdbfe19acb8f5c9d129c6fa2d122ea90106fc7494a2fe11f0d7107b59. 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/USCW62392602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ecda575f1aa0ae9a828b701cc9720dd9196d6254de539586bc11d8e031b47. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCW62394801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863fa3b88a6f69fc9ca1b7d1c84005d45178c9deec5f5668e58b389228295973. 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/USCW62394401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b748e22cc18ccec5399494ee42d68089099a9d90acd9a85427494fa153fe3d. 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/USCW62394403.