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 0xbb304a61d52b86a0c4f7c3acfcf4fea4ad7fe42d8267bfb5ac1638dee89fc4fb. 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/87e47907-ca1c-40f2-8aa2-7df5cb263a6d.json and https://artists.proofprofile.net/proofs/artist/87e47907-ca1c-40f2-8aa2-7df5cb263a6d.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 0x82447125b1d27f5629c9e625e0dde13283620256c86a16fb2a433c0c16e007ce. 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/QMFMF2117044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d3827f91cc36092a20dd8738e0f24be53a9b36e729925d79f2760312d3be8e. 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/QM4TX2231562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281aed63d2a9380f9a25feb0d5d73a5d006c92540191c579f35f3ca86e6e58d. 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/QM4TX2231587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb76be4f6df9a593d0ecd3cb6a11df5da0d7f6284128f49eab0b7dd2d123135. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMDA62115089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e994ff287d98029fa71f00b8ce34c75ccb842766e623231e99d2ffce5ebb69. 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/QM4TX2218844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89af8a0cbf4e62293ef0a6adc4411530249f0a665b86662899514a8da876c3. 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/QM4TX2231590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25815a98685a0cb9162fbeca361bd8c655e48410a74c17eb2faeadec9ef227b2. 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/QM4TW2245465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed81895144b34cb85d96eeb1c922d35eafb898170f5610cc67453ed5f158f54. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QM4TX2231568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca0dafa521dda163f6f6ef36b9398ed129791aa0fe53b42b4bc1e47b3cc4ad. 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/QM4TX2231611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37013726926b381dc69ac90f3ba2db67f68d5d8b92da09696e878ad48a45af92. 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/QM4TX2231516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856fa9a044858e0f45d90914604377d4456263b8432f0203be8502e6060ad988. 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/QM4TX2231592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433f4f59b910bbc344e8596882f79752d020e4623682b68c6a4c12400beca23d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM4TX2231572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d14146cf521c486cf0dea335280cb80c5b301f6193a7c806cc4c46a972a8b6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2245467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84f76cc7ff2030218bf89437e932e6c885daefe15bbcbdf53e0f753c93d078. 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/QM4TX2231591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf654ffd6368f0d25e246b2f90bc540f5b3dbdd49652fdb04d18cc54aab90b6d1. 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/QM4TW2255130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602f4162cd16c307d662488a0441c93460f963ef04cb137f2e7de7253634413c. 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/QM6MZ2277659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc4547a0fa13c3129146abd8ac5a35ddd213082666efbae53181d6d5040c53. 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/QM6MZ2277660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c947a7cc0103e81b0064282c574a2c79c645c2d81f636bd6640848536987f18. 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/QM6MZ2277661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910069fd3e90bd69507d81d2a402e6bfdabf806d9091ab683fa7e2e3a6049a8. 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/QM6MZ2277662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d5628c5ea055919154b815ce234473686ff0cd8d7b1a435fdac349ca5f91f8. 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/QM6MZ2277663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccc7924864b9ea97ab1ec3dc4e14e317bfc925dac38f07d4b2dd5bdc3dc887f. 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/QM4TX2253178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3670a73e481999aa2d445d7df909461cca45b3fd798ddfc563726f88c0d09. 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/QM6MZ2202142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b72c717bb1dae36e14e7cc381eed5912f2617a0d53611123df022a86f72884. 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/QM6MZ2202144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7245218e44b5449945c24b6cfa09a110c951c4e102d34ab48c260eae974315e. 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/QM6MZ2202145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c988f868668e7486b5a707c1099900f6d234385acd15d3f4bd1a6757de16a4. 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/QM6MZ2202150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc0365fa7a93353c6a1649d85ac6b232b171e9975aae6bb606a7cc270226e7. 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/QM6MZ2202157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f58bb5b40afe9ba77237783471bbc81c001cd86a0e6e07a6704e37c8fca983. 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/QM4TX2253177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbf1b44d813b66164ea3eb9247382107c4a53b4bee489105bebb2a0501591cf. 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/QM4TX2253176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76baea5bad307498702b880bbe2e096146ab423c6e66f2df4d9216d0b9209344. 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/QM4TX2253157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa519c973b9c3f2abfd5f1d17b1f30298ce014d2a7f10f813e530c3a15665b59d. 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/QM4TX2253141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89af8a0cbf4e62293ef0a6adc4411530249f0a665b86662899514a8da876c3. 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/QM4TX2231590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84f76cc7ff2030218bf89437e932e6c885daefe15bbcbdf53e0f753c93d078. 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/QM4TX2231591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856fa9a044858e0f45d90914604377d4456263b8432f0203be8502e6060ad988. 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/QM4TX2231592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca0dafa521dda163f6f6ef36b9398ed129791aa0fe53b42b4bc1e47b3cc4ad. 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/QM4TX2231611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281aed63d2a9380f9a25feb0d5d73a5d006c92540191c579f35f3ca86e6e58d. 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/QM4TX2231587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78469398704d222a0829d45d862322b293889477ae9020acd61f1ae4522d3711. 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/QM4TX2202355.