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 0xff9d4afad4a82b9e6165d2822379b1fba36c31c1801df082f1f279d3c0caae76. 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/a94f2602-aff4-45c1-8e38-39710edae490.json and https://artists.proofprofile.net/proofs/artist/a94f2602-aff4-45c1-8e38-39710edae490.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 0x77a147cd3d867dd5acd90a57e2878046bd64ccfe4ea5c99baeb9d59fff935260. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX872369588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24947197cfb19c5d57abdd2f5178585750959a670ee9ceb4b03c9ea05b7830a9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0L2366097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a513ceb6b5a98a4302dbfe14c161fbee87948edbe7b10ee583a7971271af114. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0L2366099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f2c4d38b6f030b6b1ab1310a8a3bd899c1b4e5ce6ff283be43b9033b692ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2366100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3181073696362bbddef2de9beb0f8d406d78740c3de3489205006e39532d97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2366101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4584ecd5f42bee25e0df0ea148551e90fb52a1ac1471d7d81f293d7919c39f81. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR2X42416323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6385d6d85d90f91fbfd33bb409656a9461b293610469d4c3e887d2050e5df922. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X2415044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4393cbe6ddc5931ca1ad0dd96cb930303d8b828b629477c5697a8a61bd531e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX282467512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae51697bb4b3b29d765e302c9165a12f5d941c5c72316e88fd2909d6f092243. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA062445773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae286b7ebdd91f852c28986538f1c7a1911cf1370d892cb7a18616efd62d8f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA082454902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493de1837526300e6ad35d28160d99499402240dd0f02a1d582ec97d2b82e36. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DGA0L2406283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab2231312eb5ca8059e65950f75c9d85689437e355232022d1859eda1a42f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0R2492585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab2231312eb5ca8059e65950f75c9d85689437e355232022d1859eda1a42f0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0R2492585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529c01d6ad519c2b06bcd5981323423eb17d0074ad39c04255a2bb9d3a7e58a0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DGA0T2410346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7fc187cb9e4ae4b55bd19185da857660c86c2bf05438f9737058379fb4e422. 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/DGA0T2410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a69ffef6050417f3a0e123cad4d398c295eb38e075403def7b8363dba74f9f4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DGA0T2410349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4d15a51872e03ffcd3506bc6dc04749fb0c4d5e7beceec0d6f16367036acda. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DGA0T2410350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce733065912a60fdc3bc0791a2f6bc8d9a960a2e488704bc8213fc7360ddd101. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DGA0T2410351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca35f6df9f0779a8cd99c76e107ebe1a61c8659a58aa11a4f993d2d912c820. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA0T2410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5575f7fe38fbbecfb32843551dc4a85c111f2c3d95e748562cb3f92500d88c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA0T2410353.