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 0xf5ad2cc1759d1009c3607654420646932b9fff851f62fafd8199c060aab89b0f. 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/8e03862d-cd80-415a-9bae-8d7f8044023c.json and https://artists.proofprofile.net/proofs/artist/8e03862d-cd80-415a-9bae-8d7f8044023c.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 0x6e6c4dc1c9cc22c88bb6f267c690ffa1391c514aee7e9caf3e5c1112c467380f. 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/QZFYX2405982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe827e5c51e18375b7224e2ad10503ee1fb82800ec2c6d45c38da1e346700b905. 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/QZWFS2325691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a24e28afb53c762b41f62d7cfd45d860a0b3a1e8b373be713da0ee47f72a65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:34:46Z), 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/QZWFG2344111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb871d5e9f285893cf7a3cf12f4ddf4c2a8cb0dda6c069240c34c5fc56c434c. 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/QZTBF2317772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c49bcba7723d59af4e3481bce61998808a31ca396ffea09ab32a8372423f85. 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/QZTB32324176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa8b5692df8c23b9a79ac45693ef00020e51f5a6722532d9bc19a832a869fea. 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/QZDA72325009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd6a632a4ce56744b1ef72ba1f57426bb0cc9c44401396b97b7f22532a5567f. 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/QZES62355250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceda554f11ab92443403b2421adedcb31203767579ca01ce1ebf890b43b1922. 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/QZDA72325010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24145a021d26be59199e0fe2321401ab7aefe72ab3d01739f9ef277964419a19. 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/QZMEN2240434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1d3c7fdefbbbb3e7e190a283e4edbdb8ed0904d8f4ba629f10f1c9efb8daf. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:00Z), 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/DEH742222594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b246a3757aaacfe5a8d37fae3c1417d2d4047c976b1b3134767cf3c437f033. 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/QZMEN2202520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d1a77f4ecd40896648100b001296a43a9a4ae0b306670fd65d9bcedeb9721. 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/QZMEN2201537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12d19e9604a87942f211668696e33643d4da0b89ee816563092ee9b3eeed0e. 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/QZMEN2200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f99e9f3c976f045316ade8fd580032f94e8f368a01d1bfad93faa440cebb6. 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/QZMEM2295246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba055ea4574fb5357d0c411fc2e0aeb86c3af53cb0715db0172f76839b8fe83. 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/QZK6G2229288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583c9e62aa368e49cdf94e6e8a20c2f031f24e8b4655ba3889b0dac2333e69a. 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/QZK6Q2261065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6a139d8b6ad2294d57c38b0cc25c8116fdeb5c87d885aac31bf1a25f85181. 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/QZHN32255999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca43bd89d9cecade550cee35ed7ca04ec2af018f17f6cbb3e1b3e8cf0c050869. 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/CA5KR2220059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61b8c4f1655e7266868ff1e01e454a28cc1908b88d122751b132aade753edb. 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/CA5KR2220060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecd4951249d5a7d25835f23c68d883801f3196c35dfc3c0a4f679e82d6c5c42. 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/QZRP42173915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15a22e19e8738d80b31776067b6b357b78400c6650d4f5b5e1a6a2e2e80a59e. 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/QZNWU2186823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258124d90b4fb12615162d8774579c5a1367631c4eae767747b7d7380638e7b3. 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/QZK6F2171108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c6971c02750815161d49dc2b0026c612d87fd7c63da3fc11927da588b01c7. 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/CA5KR2172113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f5676b60bcb00881d8fe0e8edcba1b59a1048d408651c36c4f2718860ef20c. 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/CA5KR2172112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc48080f6bfc66ed723c12ebb2ad8387269d2711cd99390472c535dc3c3e9196. 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/CA5KR2172111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e6a0416094959c8b0b686420c660b21238061b5fcf4615d32c3c5522f981db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:16:52Z), 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/QZMEP2015489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ed5eaf92a27265496a073a493fe6e0a2e675f0b03af49f70dda93d80b2c82. 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/QZFYZ2049664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00cfef78b185b0c4028fd94e8006b95775251739ab7f4473931c62acb110c4d. 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/QZTBC2491852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb068d4278738b74ced46122dcf7a476d8ed70097908ee9d17fbb26d2e58990. 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/QZNWX2420715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9bd2514d477eaa19018d30d5edea1fee6d7887e20599a63bdf42f25ab25288. 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/QZNWX2425711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa255b3a5062a627b5f76340e08e2ede0fc489d038983f0d8ecda6a27b7e09a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNWR2419979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eda63f1634664d45343c98c700efb8a25f73b97d8d8342250b7de11348632be. 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/QZHNA2445656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1696a3e8a38f223b20d2f76ac4d59a3161d847a581abf959395d5022f90f848. 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/QZHNA2437377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcda261701efce8fb19c784b7c2f10585b8c35b4f6f496eaeaea6a120ab9bd40. 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/QZHNA2440317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67de02a5de5063ed1242d27be1162109e88dbd0b970437e91b6d05dece28c1ad. 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/QZHNA2437253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4b00dfa933c1b5396fee060b67599f9349f41a85717cfb996a9085394a9bff. 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/QZHNA2432316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03252004610d5a3dd94615647f959d75fd2299838e7f984824b44d5b1d239e2. 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/QZHNA2431233.