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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0da2af388a56af8cd6230c88c88eaa063713ba8fcb507ed2491dc4ec7135f8a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/075e7a43-81c1-41eb-99c8-b14fde1a1459.json and https://artists.proofprofile.net/proofs/artist/075e7a43-81c1-41eb-99c8-b14fde1a1459.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e6eda64a65cf09a7275ade628f5d7836c08a7b2ad201434442fdb4b41b1d1a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFF2305502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea675674775afa997cc7c0b76486aa4806004e6dd785a1e533d3f9870adc3c78. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAX2338245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c192ac93759012a6be6ba4661e84cd80076eb07cb0e068f6c8cb36d3d6d0de3. 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/QZNWV2337795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60796952698e72ea43a73718f9d0e60d8003be227ec47dab513ba8f218078b. 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/QZK6F2207872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4868d3338915e637678f49b4af21fafc8bd06665350a4d3c395e860f4422d. 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/QZFYX2162609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc589ca619f085acfb0d4ac65b696f173b077037d356ca8307063fda6678faa10. 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/QZHN72086264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9dc47784dd922fc5efebe7a9b80e36105994ecd6724f222984a1c9df677258. 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/QZFZ32083592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25353bc16acd327f854b879a9e79431ba5691654026b49ca39cafa48696d486. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ32083594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995db85834352621cf161b62e7b93096a0b0d08f390777ccb8dcb65e9531e964. 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/SKG992000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9522ac52e2adb0bd10b926d01d6e3eda222670c2c7af2eac2094fc2dede2774c. 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/SKG992000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a201d1f3d0739941378a507ba8bb9de6bfe977fdcbb5fcb0ba955cac75d02db. 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/SKG992000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b0c47c7dc6a0f1479a555bc34767318139e66cb41cea182014515cf1bd27a8. 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/SKG992000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466d521a5361402a4d2243655c3f61c7816bcce855c5636347132de8ef7dc821. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SKG992000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfc2e703f5883f312a10fcd3a9c2ff42dcc6aabea88067a2fe58f5f257c733b. 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/SKG992000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297befeb94782a89f0f82889683b02d0b50dfb84379758a8158f9c80c1dfeca0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SKG992000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9ee0b0077a21b448cc4d2fbf73f00bc058b528ad291f729e16af266c5eb0b. 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/SKG992000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb26087f773f8450cb0e7b69cac331f80ec0f9b3ff241ed598f52cf28deb4b8. 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/SKG992000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bbdb4ac322507af0bd3233cf2fafa829f13535b00ab737e2654d7d883e8ac4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SKG992000109.
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 0xfada8bc9e2c46bf184bccfff80185e6ff4da140d86a750a83ff4a17151beb762. 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/QZN882284730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a5700318b01f595d4a1c993b4106250ae32b25d5857954febf2c2548f77884. 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/QZN882284731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6962893398f0345a6d28f04e61527d168ef01de75d621a4eb49f29af7dde87e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882284732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ee64ea86ad16ded0cc62335645c38d6c53f7600b6cfab88bef28f31ba7694. 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/QZN882284733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bbefe1dd63a19fcd30b55f43a3d92ea4ced68c39110126508fef6d9895d521. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZN882284734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7edb7e83a9efd79ab411d849deb1c688d4c45d5e517715644d08ba3b27f83. 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/QZN882284735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6325a219c192ad2df6fa2f7111d8c01063d259a4aebe7c5f2bd360aad0e3d7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZN882284729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2613ab788d6990b52af0b5414031df0cddfeb9e5100c0bfc22538076753ecab4. 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/CZUM72200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ded811246ff0f0b18afeea4df1ca38fa067954f2b3cc37f381e67006e1d3ed. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZK6L2058802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecabefbaa8d8df4afa9c3c13614cc5b36c08a641d6a755652d14f8c17156314b. 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/QZFZ32474242.