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 0x78a5fdfe726bb58e36aee5b4ea1f61970b7ee661f8c3cb0626f4f60ceb5cee86. 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/a891ef6d-49ff-47d5-a652-6b8451f1d743.json and https://artists.proofprofile.net/proofs/artist/a891ef6d-49ff-47d5-a652-6b8451f1d743.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 0xfcbb3558ebd47ccd386964165d7cdf04b4d8ab343bbc4b1a315b24600667703a. 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/GXD7V2546862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc95767b2a3d03d9b24172078fd8ae1a2f92fb8287470c70bf7d420f6d49536c. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/SGB502536969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3309734bbe147e2187152e656303ab8c56640af46ac082f84de103968ccb9210. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GXD7V2584452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0f4bd8d947105047de52dc2c84f21e997b891e9696f9f26151337a385a82a6. 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/GXD7V2501362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051d130ab78cbb03b8dd07ccf0cb86463dd11d1b2351f15acfe381dd1c9f037. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GXD7V2550356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f456df82774152aabf18d9a6c9b1503b7fd8406d15a976d44519d3d33ac03f. 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/GXD7V2506458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38d3fd9f9f43e912846356f715b9bacd83ca1862b2aee2ef8a59e982bde07aa. 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/GXD7V2582976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199be75e426d17b26f04be54290cc9f3c6b90cf4cc960d9c2b1d22de0925b8f6. 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/GXD7V2508534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70d6cbb2f5f685f1bff2fcc7f6e1e7742b8f3f11fa6dda37878ff227077e044. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GXD7V2506671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6e22dded052228cff2858c526a84091a0506f03a7024a7b434ee5716a9dc50. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GXBAV2562087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3661e64288185fcaf6fb654ed25b88af499d5ebdc05ff2eebcc2dd3bad6b03c. 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/GXBAV2518424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f96a19c2f55fc14307ead99f9528c85682508ea3bbc5874d225dc1bb4f1437f. 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/GXBAV2508001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9960d19bf5aec3401dd24c73e4ad3aa3c11eafb6196b0fccad6421a8c1cda79f. 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/GXBAV2517163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d396c74b787d2d799779bb72447aa84feb219c3343a6b11993850cf0a01ef87. 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/GXBAV2574768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7742c773108c807550aeb86adbea1ac9ee784bafbf132ea6668736b1634e8ca. 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/GXBAV2549724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e085190ac6ea59b4b165a7547afabf72b656cbfe1d135383f9aa6e9bd44ca2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GXBAV2518389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e39499c2f0e3e1f025009e406671950e90fd07ee5af26007238af6cec65c7e7. 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/SGB502558119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b9ff3b1bf263014702e4e9b60a562e83324f4c3a787425dd1d7b502ff4dae. 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/GXBAV2263350.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179142aef7011300b1e538513e11af6250149bf1f319bf33f3093cdd643385fb. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BCJBL2100155.