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 0xc6d60a654dfdd29bf4d69afa7b58d829ad5e03f1cdf1209738bd7cb0d4aa660b. 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/33f5b3cd-2008-4d85-9b60-32da52027759.json and https://artists.proofprofile.net/proofs/artist/33f5b3cd-2008-4d85-9b60-32da52027759.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 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 0x032e9c84f092942c44ad8ad59838011a58b8ee474537e8884ec3c79448036818. 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/FIWMA0500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b130477c2682afcea01e75e63e06280661b07cdc6de4efa31e07199be53dc3. 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/FIFMF9800239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ca5cf97a8774f6319448dd53339674dcf821d8ba93bdbb5572250873d3a65. 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/FIWMA0400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d5cc20491df780e2f86d6618e87b644080c87879208c4bd46007cfcd84c980. 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/FIFPS7900045.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48265fe39eb6cbf9abf6c1077f20dd1097bfad10debcf16342b639f31acd4d0. 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/FIFMF7600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f77de166bc9fc180773f26e2781d3cce1a337a32de7add72d2fa424c841a3d8. 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/FIFMF9500493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6003dfd84b4ab7aebd87aa588f694a3db561bf7ec06f1824d52c2fef7b6e94c. 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/FIFMF7701100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31c317c53e1cc7100bd63f76eddae3b6c8b663369321c3fea70733536dcf68. 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/FIFMF9500494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49ee4a3a812e43b0b351764df363ab2c5f408788486d6312824e2fbdfc12feb. 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/FIFMF9500495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b523852cd8d7d048d361d5435275370793ebc44fc7e244bca4fb954a49c9a90. 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/FIFMF9500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34613bfffa2a3b1c119582ba3075db3d0966649c1e1940117114a0e4b3e63442. 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/FIFMF9500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee163599c9d04a42c63804a80970dc95d7cb7432ffe2b9eddb8151e94166b1. 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/FIFDP6100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0820f51cd2568572e81292a960aef2fbadca2970f270956ab00b1071683cd. 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/FIFDP7900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebfcdc522da4ddcd926d3faa4aecc5fb23baad57e5c42c252c79d653723cf6a. 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/FIFMF9500675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57a4e0127e685cd17d89ef7d1df8029068d9ca801372bff989c3b8202197e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FIFMF8700099.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851c670f48777d46d5b07604027c147fbc3a02bfa3d86e5bd4b9540d990f33fa. 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/FIATT9700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfe463c24083d9fdad80709d130cc2b60f92a191d18aa99ad613e6e587effe7. 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/FIEFE9100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef748d75925da9cbf589f28de0fc798419973c3dc0a661a0537bc3d572d5ad5. 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/FIARA9600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5b0c04adf5e4629ffaf35eb86a7130beed88192147d7c43df04fe30db68406. 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/FIEFE8500007.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032e9c84f092942c44ad8ad59838011a58b8ee474537e8884ec3c79448036818. 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/FIWMA0500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b7cd935248b31079d21b1392f6bc374cc209381fb555c340c1741103b99412. 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/FIFMF1221000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787dca99c063d8bb82d32ae1bafd4ab073841bfc5127ce2c7d8d91112fa38dd. 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/FIFMF7700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c328f3c852236653c248137193c069183d3d784a24cc2fd07069f70f2f2b5b4. 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/FIFMF1220819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14d07181a517b481ff2291e54fa798c64fd7815f5a2e3e5930b1e18bea38df. 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/FIWMA0700879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c388c6ddd7f598b32562837e9274315cf0b0331e6544a1b9201eb8f2f548d3. 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/FIFMF8600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404c2c6cbea3fc863ab9d11892c101f522767e927af896a1d733c87e285da3d. 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/FIFMF8600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10b74db9bd703be3bab83ee0c933b3c45a05de36c763f55c26c52975f65198a. 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/FIWMA0400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9758d8d664ae8b5d3c15326128a189afca7ce0e830a87a3a4cd19fad637237. 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/FIWMA0400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0820f51cd2568572e81292a960aef2fbadca2970f270956ab00b1071683cd. 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/FIFDP7900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b50ff1732707c5fd395e563ae5909abb47d323d7838662fb53a0d82c5b3473e. 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/FIWMA0700523.