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 0x72074f6309287d4f35739843e96abf8f5578f5a5536f675927625b72cc52d5e6. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/356ac730-bf9f-4376-91dd-f2728ed27d8c.json and https://artists.proofprofile.net/proofs/artist/356ac730-bf9f-4376-91dd-f2728ed27d8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
VA Innocent Music December Sampler vol.3
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 0xe51e9bbc9b6096b74f76c60dbe78f0c35b9856205c212bde469b8e31977e6ef0. 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/FRP401500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a777d472b909f6c1c2d81673b7ffb124ab1abb3f5aa794c9a11b686ecfd5e6. 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/FRP401500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f0b79ae93648a7d52e3182f5e9346abe149eb10007e3aa4678eefcb8c0de2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRP401500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c60205edd28fb2d09664b9ec632445aaee510d73637ddcdaf3d78975c3487. 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/FRP401500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3035861bbb3fa768f4209e79276c8901d8371b0a7ab612b5900de8c39ef5b08. 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/FRP401500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126115164734e8818bdf52cbbead3d726c690a85ba4ae0f345688eb9267a6ff5. 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/FRP401500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f73ab5767057c798cf487ae219ea3769bddd1f2136ae7b0c6e07d83797c83f. 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/FRP401500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3e41f25e388cd2cd52e53df2e83b415b232cc9e5d9a689d653aae267aa9b3. 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/FRP401500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559d48f032904aa73fe57d79066759a5598787966a6cd974248393c6aad483b. 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/FRP401500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59de0a7bffe73093621a77995c45f64cb2a0ecdbfb2c5e97dc97202945f91a. 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/FRP401500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772967c5b9aff396318dd92ef4d9cf4bb428a72ceaa381f4c2677d9cb35bdd1e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRP401500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de44320f4656c765e1300cef97b8f59e0dfa3f74b7a8569762ffaa7cbb3ddaf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRP401500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c127cb81ea7b0b8983cd4225fbd6ec57b220a5973bbe63dd75651090180958. 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/FRP401500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6b5cfa47a9b381ae3e9edb586e256995665a0b6fa563e4dd2cdbc7f8af7e7. 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/FRP401500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc039db20046eb09155f9974cead67a48fb08ca76623f9d7c2747e43582b98654. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRP401500350.
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 0x890082094c65f6f0bb1ea61bfca20f9b63a66c00f23086f22e1b4abb19094e14. 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/USTCG1096561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62036e6ad5c2d1dd7fcda2e3ffe155a9e2bad840569666291aa3287bcf14d84. 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/USTCG1096563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eb8f33a3a55e4ba85c0e3b993e1d7859f9d93ff84949ae47abecf297e46da3. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/USTCG1096575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e5a74f36636a7737c0945e32bd5a2a62821d186e1111bdd55c6d97f886357. 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/USDY41832618.