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 0x2dc318a83a38c58375a28f72a5b833e3432487dffff829b679607550cc1e1a5b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c3da16-4790-4f05-9de5-82a7340b0aa2.json and https://artists.proofprofile.net/proofs/artist/f7c3da16-4790-4f05-9de5-82a7340b0aa2.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 0x7948f9997d3564d6478642b23a98964b342ce8395e8e66f70d4736d49ac30a66. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR9W12209732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245e4350f87aeb3da70c9d6ccaa537b608c8a08983c50dd86de6fd63f7e48ff2. 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/FR9W12209734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e36ae87084348b793c8e43ba6030cf6e60c97797aae16b05367350f68f19f60. 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/FR9W12219573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6267b84e2197c09426b6ec408b79e4f6181465a14daa999f78348fa4b01cd1. 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/FR9W12219574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb5a195b60d2755847dc4ed3edaad4736256ea0f95466add60e16084b27f7f. 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/FR9W12219576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe67d7e385f93d71d5d6a94d80df26432d76d408aa6f9cf3d087d799dfa567. 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/FR9W12219579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b258b4a280c641d361e39d9685295935558e28ffeaf1a06c025a917b685b77a. 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/FR9W12219580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893d4f001951bfc74dd4101496e6b65e7d36604f284e7ec5d2c7bbf8aad6d4d. 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/FR9W12219581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08680a4e86d831565d80bb5e0ebc88f0e247f6117805c8f7f04ee351047bbd67. 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/FR9W12219582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860f0be1103614cb6f1ef608c52690719f5c7cb9f5c76ddde23ed0b86b8347f. 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/FR9W12219575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dae5a83949839d9e26a72a6e1eac7118a87f496b073789060e39eda2cf2ca7f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR9W12228046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353461e724b4d18207283c2b685e1303b399c61ae45b46d606614353da24265. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR9W12228048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203cfa7a03a35d4a7cd50faba7f15e48586903331febc606b8dc6debf83c6dd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12427961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd488d519419e7f979916fd677275279cbb54aa86a7e78423092aa55aac124278. 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/FR9W12427962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7f2312910d9e3c30beea86c91aa47136c2ba1334d5781995e42a37c958085. 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/FR9W12427963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00944b867e33a38341c15516f498536af7371eac763ccc63e6caaa90ef3cb20d. 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/FR9W12407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb216a9dae4f939bdaede20c227507cd458bfd8c2b90a23838e869b6d5d726146. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR9W12427965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586a8335f3c3fea042f9e591e3d1ca0947e527e6bf3dff7df898570ba6f817d. 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/FR9W12427966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203cfa7a03a35d4a7cd50faba7f15e48586903331febc606b8dc6debf83c6dd. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR9W12427961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7f2312910d9e3c30beea86c91aa47136c2ba1334d5781995e42a37c958085. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR9W12427963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00944b867e33a38341c15516f498536af7371eac763ccc63e6caaa90ef3cb20d. 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/FR9W12407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0f8c01115564e59961b91a29f31e596539be1d6a8a32f57750c84f33f48c31. 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/FR9W12441671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d052f46fb586751f9f8b813400a04ca3ee11021088fdfeaf6276875d75dfad. 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/FR9W12441673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b9642c6e4fde8219e31780370c449f695bcee6b284dcef0db1c886f15c08f. 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/FR9W12441672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb43bb9c9599ef55539696e9c6d1ec265865be8845e1212869c75a0d8e915af9. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR9W12509834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd500078a876077b79a3b48ab041ef48c2e8d473d41def3eea78e398ec098897. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWV2309490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efba85ac90bbbcbee8efd1f2d25575e161d2bd825aa4b4b731ba9fdb8c8f56e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNWV2309491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd50de8d31ed11ebd91162e90686d715e132b37bba7f023b742b41b16433c2. 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/QZNWV2309496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5d934e411695382f9733e99dbc1c0a32c6e812d61d433068a2b80830ed44d3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNWV2309492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a88906c514f59af4eb1e5b0562875692ce9132db266ff237aa41ae20395b7. 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/QZNWV2309494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae0c5f81748bc635982473a96a340b5f37e961e73cf9ef3ec3e9d705d86c39. 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/FR9W12317922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173071c0e65bf2fc46d3f205ed59f149d647ccacb9e1a552f41d8b9d70393863. 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/FR9W12317923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddac23cd06fa998e2339b8f5826f03b5f5b56a4dfb19b7710327855fde5c79e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12317924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd03de0ba78f3c02a63e0a975514484e354d2653b02ea5ae0462e8fbd3787a7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR9W12317925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35c81367df508bd9688f35408d17a1acbc9e162223fe22680a8a5a162e2193. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR9W12317926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ae0965937f25286f87b3ebeb8e20fa6ff11868ae87957e2ce6cce6948d690a. 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/FR9W12143046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4528834a820cca947c575788571c71d6c7baa4da5cc0b225d7818332023443. 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/FR9W12143049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b7550a2698c3d21cc05d8e182258ddca8e95c65497eef2cdd3813131c105f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12143051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026781f99e1c306450d171e08247e339f06a97e31acc1d7016eb4c65ee85775. 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/FR9W12143052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb656effef9184752af8fd8e7a2cfa54a7404475bc3f6e6dc288ddb06f3d87a02. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR9W12143053.