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 0x0b0c17b59fd220e456f600db04a68e2cd59eb6e05b0879768d00805f459f9ff8. 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/13873095-4f72-4829-9261-9f7cf11cef56.json and https://artists.proofprofile.net/proofs/artist/13873095-4f72-4829-9261-9f7cf11cef56.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 0x917d02b304427ca19ee5e56e71c3cb30d727dd9d1fac06828bd44b198e6b5557. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ITB2K1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3438c6b5e292bed229f9a82a41f18a93c50578ad61ba60ca7ac20357ccb7cbc8. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ITB2K1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8269149e862a25cf36e58e2aacddcc53a0832eb71d85f4742288c09e56ea98. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ITB2K1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3bc471eb5b463a8d368d08e81194e77c09b861bf99c2b604a478e043387153. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ITB2K1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d715d19977fe5baeeefcc1772573159edb9d940d30515e1c7c2ff8c750cde. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITB2K1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6c2425fb80634a46c85240869910fab80d087a7186aaf5653e749476f4ce8. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ITB2K1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aa9c0d93d917e3f4170dbf1f90b86e878b070c94d6a505dda3b5536a5565df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITB2K2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98805b4d6b6d451a042d2df03308493a0f89c4df285c3b8d0dca7e889914af24. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITB2K2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd412ecdfbff1237b4bc0ed81177bd626f5a840e585243fbb7fd4e309be5b1ba. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ITB2K2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aae379cac7b6fe76f7217ab4f9a4d774207a51082bd50d40c4b5fe4bd15f33. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITB2K2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674d13d5c8d32e9d6aa7ad7dd1348f8757fe713aa816422ca678d4d7e6c5ff7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ITB2K2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb4ae56153a1c05c9f40651809ec44c8177aa4cbbc2cbca530505485614114. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ITB2K2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15041b7267649b7d3199385534f56903f5566870a30cd973f4b441cc6291af99. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ITB2K2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3167140820331daf1d4486e4f1ccffbb1ecac591fccc9e2b685138050ea98204. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITB2K2200001.
Seven Days Walking / Day 1: Golden Butterflies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564582b9582f1a532d5af40fbb2c20a4727317dbe4a1addd56c832dd8e525939. 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/ITB281800006.
Seven Days Walking / Day 1: Cold Wind Var. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa218d55f32bdfb19893a31763e86c73b7b48222b6056c0361e834b98a191a6d. 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/ITB281800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371c5aaabc27fbc033230a36399e6955d1a43a979a553678b71592dc86953c7. 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/ITB281800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24b1546c36cb8372d4df27afe8b0b3be7244c4af1874430c8ba8eab10f6b30c. 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/ITB281800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371c5aaabc27fbc033230a36399e6955d1a43a979a553678b71592dc86953c7. 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/ITB281800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b0d165d76e034744ad3beead2c66c028f2fe8ea46d0aacbc5c4fe2b68c44e. 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/ITB281800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa218d55f32bdfb19893a31763e86c73b7b48222b6056c0361e834b98a191a6d. 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/ITB281800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564582b9582f1a532d5af40fbb2c20a4727317dbe4a1addd56c832dd8e525939. 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/ITB281800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b05138264eea24f902a5d012c12b699ff305d5e9c45628bd66fbb316249a973. 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/ITB281800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633d989c9c888c4923019dbb5e064fb5b412a53de66fa425efdc0c6c56604753. 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/ITB281800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cfb0c9d8f2086b9d3184b8da7bc516242ada5722cd41f3a8923d50a8ea5931. 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/ITB281800011.