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 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
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 0xac6267b84e2197c09426b6ec408b79e4f6181465a14daa999f78348fa4b01cd1. 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/FR9W12219574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb5a195b60d2755847dc4ed3edaad4736256ea0f95466add60e16084b27f7f. 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/FR9W12219576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe67d7e385f93d71d5d6a94d80df26432d76d408aa6f9cf3d087d799dfa567. 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/FR9W12219579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b258b4a280c641d361e39d9685295935558e28ffeaf1a06c025a917b685b77a. 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/FR9W12219580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893d4f001951bfc74dd4101496e6b65e7d36604f284e7ec5d2c7bbf8aad6d4d. 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/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 0xd488d519419e7f979916fd677275279cbb54aa86a7e78423092aa55aac124278. 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/FR9W12427962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00944b867e33a38341c15516f498536af7371eac763ccc63e6caaa90ef3cb20d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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 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 0x00944b867e33a38341c15516f498536af7371eac763ccc63e6caaa90ef3cb20d. 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/FR9W12407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586a8335f3c3fea042f9e591e3d1ca0947e527e6bf3dff7df898570ba6f817d. 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/FR9W12427966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b9642c6e4fde8219e31780370c449f695bcee6b284dcef0db1c886f15c08f. 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/FR9W12441672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb43bb9c9599ef55539696e9c6d1ec265865be8845e1212869c75a0d8e915af9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W12509834.
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 0xad35c81367df508bd9688f35408d17a1acbc9e162223fe22680a8a5a162e2193. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:01:40Z), 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/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 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/FR9W12143049.