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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 0xee7f204c81e4a869fc30a2738a8ad31c971c8e2041730cab42c82f3e23796aa1. 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/b05d7fef-5b06-41e0-8f6a-b62c83dba6ec.json and https://artists.proofprofile.net/proofs/artist/b05d7fef-5b06-41e0-8f6a-b62c83dba6ec.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 0x94929e5d0a6129e8c25e666699a82be55b08fb6dc9549b7d9ff2194ffbea3ff6. 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/QM6N22267605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931423260563e0389753cb01d53bf2dedb5d0437cf234af44964be618aae3df4. 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/QM6N22267616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cccc952b54180b61e1be45318dcc0cf2ef3d31fe408fe6d2d4dfa94f5a20b8. 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/QM6N22267617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c640120142a8891f09a5dcf5bc182712b86e49483e39f2e314b15a96fc23267. 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/QM6N22267608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00488d51ad8f514146ddf298131bf2ab730f82aa272ec6a093808c88fd9e5b01. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N22267619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eca659bd745bbaf451ace02e9dac6e10489783ce240f8426b2b119ebd61683. 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/QM6N22267620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658971592ad346e73387f44cc15a02cc5a0dc6d0c8d8d7038183c73a7248c85f. 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/QM6N22267621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e9078708315c2b22b2cbdbe02c2c7ea0d184b82460266e7f9413cda9f0052. 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/QM6N22267622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70baca4473fa5150500b871712d5fb44f13acaa9b945773251d1953f733cf266. 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/QM6N22267623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24292e132eac2dd71c874b8ad4169f6c3a371aca99ce3fc307c14b7f49ec3a60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N22267624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4a95938322802cabf5b03b797496ac9acd7215083c9e5c2fa90057df2d9c05. 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/QZ5F42300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94929e5d0a6129e8c25e666699a82be55b08fb6dc9549b7d9ff2194ffbea3ff6. 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/QM6N22267605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931423260563e0389753cb01d53bf2dedb5d0437cf234af44964be618aae3df4. 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/QM6N22267616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c918ff51f758ac66c9bfddcc3b15d1b8beb0eda78812bf9cbfd0443dc11677c. 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/QM6MZ2111375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82254570dcbb28c2859a74a282c98d850c9c7161f1b0ae9a78117a418e6a45. 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/QM6P42005938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83046caaf165cd506dee61e70b1b21798b4e5c0865696a8e94897dff5f44adf3. 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/QM6P42005939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a325383c695d48b363fdd525f76ac5d6ab2e0b7b79d5ab19068783d6ba495d5. 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/QM6P42005940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3bf7e06284a552d783f533fdfc4bf297dada90533a38a474db74a4eab64cb9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM6P42005941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8454c41c44c15cbe3145816534c0656693f9de26111a8a19a9ed258c0f2216aa. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6P42005942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82254570dcbb28c2859a74a282c98d850c9c7161f1b0ae9a78117a418e6a45. 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/QM6P42005938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3bf7e06284a552d783f533fdfc4bf297dada90533a38a474db74a4eab64cb9. 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/QM6P42005941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5c966c93b48e6e2cd511ebf0509bdec81bdd25c5959a63dfbeebf0de0fa12. 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/FR96X1882761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da6f10d2345b166a3758c4cd49bd990cb02c1a5b77e69d1ebe5f8614fb29329. 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/FR96X1882762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c7365d093c631a8d958b618511e61fac10299294463555b682474e761b35cc. 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/FR96X1882763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df85da5923c5f6953ef6c19d3554a22ee8df5c8abbbc0603965e57d5706400c. 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/FR96X1882764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa163389835812b77286c83f59f9e204fa0203f09b20d822a9d2400ba64a858a3. 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/FR96X1882765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571053c13d353a1d9d71abd3a7dbc65a7477af84ff0923726bb69d8234a97547. 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/FR96X1807606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfe21ec83209a8da172d4daf6d10800ae2aa50cae0167a728ca2efbf0d9399c. 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/FR10S1804478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab3ce14fe86fd0b0cf96e90b072bcb696be32507f2f153cf1dbe41af2ca4e7b. 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/FR59R1794772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf180fe341536cfa443376250e11c28a38197a404de1ec3e29c40da4038fcb3ba. 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/FR59R1794773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cddf089b9095509374d394aa63f28868bb6e480410a75d18224a8664e2d2da. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR59R1794774.