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 0x62750c56aaf413ba2e58ee61d77f997294281420147eed781b3fccacfc2ab8e0. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/108654e3-6029-4dd9-ac0b-91f562ff313c.json and https://artists.proofprofile.net/proofs/artist/108654e3-6029-4dd9-ac0b-91f562ff313c.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 0x351aaa53916b9bf0843d303f83d486d6d2ac37be15e586923f099f1a0408ca47. 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/USM2Q0800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19936aa8bcf4a92c6c1507a0cad09b2f3c83f315b5b080eacd05317cb329bbdd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USM2Q0800503.
Sleepstep. Sonar Poems for my sleepless friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309c53a070b7920ec20f586ec942c8c539a1ac4c42d06cd2107690fc9eb7746. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USM2Q0800801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd7ec67d55b19594ce83b35e59418aef130eb3916c6fef443637b8a88ac1d9. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USM2Q0800803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6dc4b53f5df343a6f66c1961077bc25892e2bf7e58de29c424f72a13486f2. 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/USM2Q0800804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47429f18b107b264eba3e1f041ce87e9640a2bd3c555d4f77e8dd667483a76e9. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USM2Q0800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf112fb7f990d1ddf0fdf4a39afb74cb74c7494e5470efd0598e235e46170e7e1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEAS92300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48efc84c1455bedc1ab53b47496ed4b21db57e9d33aaece2fa4edd31f1fe801. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEAS92300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813e17a793d376393a446f2f910f02a9c2eea6f5a39d8c95b2b2397c55f4776. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEAS92300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8df94ebc5ca2e083d34b55b0fecebc4b815f13cf0a48702ef191f49195da824. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEAS92300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2a795aaa9c286013a945885d55b24a079fc9a4dcd608ee4fab96286a8254fa. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/DEAS92300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8819a96b96970c9553f2449961b3f0d95fd70d8c826b40eadd34b9adb3028b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/DEAS92300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5de299fd788143fe40bc43e499aa962070863d85d0be4c3033d4b6c0130cb0. 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/DEAS92100011.
Escape from 2017 - Dasha Rush Remix/Dirty Mental Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4e6b609d82de5d7e233eaf5619dc71c0115f874750b50bca6ee6a0add7355f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEPI82010495.
Dekmantel Ten: A Decade of Dekmantel Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05a7e828bbdc2303e0939aae15163e3878b6f3de2632d902375e164f4f02407. 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/NLTH62400118.