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 0x16c5934f3339f655b1fe0dbd5ebb15b05b3967bdbf46a7398f32118358c10fd7. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63142cb3-38a3-4353-b3b5-f4d0963c6fd4.json and https://artists.proofprofile.net/proofs/artist/63142cb3-38a3-4353-b3b5-f4d0963c6fd4.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 0x2c18ef0cd4725b549a404896eb6deb39461ee43cd3a8f64e0cbec307c51c9637. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEOE81220027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc85096a66f5e5774024e9c81c0725cd90a418b00df8b4500d5ab17914abdf4. 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/DEOE81220029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ccf8ec03aead096b0bd399149ea244af124e6d150d8d11692e15c5faeb2616. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEOE81220031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a53692234aa18da1e86b4b3d87eccd154c41f18325df97ce53edc59f7180ffc. 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/DEOE81220032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced04c8c5b83880bdea589f10df99a20a5a3478ecd9d723e56637652c5db51e5. 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/DEOE81220034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a6fcbde1bbdf617a2a71a79686c68b1eeb1d5c69e2e7a7c57fd17f4aa9ed3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEOE81220035.
Modeselektor proudly presents Modeselektion, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a1614dfc26c2de9212759a46b4dd580d5d22ae18500339df66088424b3d476. 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/DEOE81100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2738e2d9aa462b53a7a75f7d7ece2da3fddbc7aab8d89e8ca0982d717e8ef5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEOE81020001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e28fa183fce7a0c6754031d4d770732617ca33f1574f21fd3fa675ff011315d. 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/DEH741808798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f97cee0c8c203218a96314ce29c86c83ff4193b8c5333f9a69678c263fd1c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBHFW1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04c3275fa6bf8a0128564a6324d7410433dc8c9f938eaf912e088a2d10a127d. 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/DEX181000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa21488a559bb9dd3e3ae029a14dbde466978081ac0af36efa6aef09deefe1f. 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/DELZ31400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59044da0045100ef56da5598176af9ae1a4870606a093bd8640e4075a3c1f282. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEOE81320033.