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 0x0f23302103505bb198b75c63915a64e597de867ad9d33e3bd624d88541ec1c44. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa5a48c-b675-4730-9f59-16269eaa4863.json and https://artists.proofprofile.net/proofs/artist/afa5a48c-b675-4730-9f59-16269eaa4863.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 0x618f300f82382bc91390f81ba4a5076fa320c9561e63d652484313ea5d89f09d. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:02Z), 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/DEG021225719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ecbb3e98c510691d89923eb0f1a993718999fcc460632007232ce987b725f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEG021225826.
Heavenly Voices From Africa Sing Bayeza!
Thank Heaven For Little Boys : Choral Favourites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30ef8cd9455c369cd8e4f2a945ec4e3815870991969db2d98f5a670c2475e7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TW2286683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5634868756c7308a2cf56bd66d978bbbca23c032f79cf47771ce72dcadb467cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2286685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa44c4076645e8be6bfe417fd12ca374bacff8db7aa0319b28b4359f7d8650f. 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/QM4TW2286689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ee0b5ff77a99c0bb96d2f2327d8e3fa491705a95fd2e2189e677f1a19ef396. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QM4TW2286692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd84358ce03f46872ada6c88f8253bd2d143f82080d4cad4e8aa80f882203d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ZACN42101651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedc13227a30615db4785cb45d6c48aa4bc239705e39f8f1c2b0ae5d56dd0c3b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ZACN42101680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaddbaff08df0e044c9b809463b0a236fe72a8b4dedfb13563bf852b8bc3b3cd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ZACN42101685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c76097de09693b48b88d94e015c7e52b4e07c3113b39570ee5b3e936591f5e. 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/ZACN42101678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0afe07cbee0b055bd7cc0d005b0affa9e13180fdb2b338930b6e9eb79255ac. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ZADN42100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069dcea49b682ccf5bd8ab2839a919ae48cc213644c1c15593cc1b9abc09d4d1. 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/DEG021022203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857108051ad5f6a2fba47920ac814e85b8a8222e6ebde35526296d9260aa3d77. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEG021022204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1956d78b6534758373969fe3b227c8a5033d3d2d072654b9eec9030c813207b. 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/DEG021022217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9de060bed350cce4dfab503ecaebeb750acdb721395197a75901b8f666252b8. 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/DEG021022202.
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 0xe5ba73a461a7706171c0159f1f5813c9b8f67f2e93ca500ed3371a60b979550c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEG021022220.