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 0x090d6050d05ec7d5b6ae5277883aa97ba017b7e102d638ac8250b7520f464252. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e8c5289-481e-4f9b-8c32-f93e77378146.json and https://artists.proofprofile.net/proofs/artist/4e8c5289-481e-4f9b-8c32-f93e77378146.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 0x08992bb79cd1bbc7f4e54fb19dd2b4d57dfa0205116d1daba0b8ea44fc78e858. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLD682003748.
Replay:2020 - Best of Tuned:Flow (Presented by Paipy)
Replay:2020 - Best of Tuned:Flow (Mixed by Paipy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367540410a6df50589a98c8863e89cbf98b034423ddb3f7685a1dd84138e87b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEA312107791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b21d0df025694eba4849b6b83578c0ec2453b4cb5a3a1af20d09ecec5a2f15. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CH5012200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a2756c8186585f0461da29adf8a8dee0020a9ace228830378a90e01cab19ed. 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/NLD682202106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09a5b46b61cdd3eb2f5daea7ca96b1082e6608f5125930972d44a4d86df4f7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBKQU2318290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3925b6cc7fdac2553a954b803ff9c59a847049f87199ab8c287c961ca38532aa. 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/NLD682301285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de095880ea6bef40c19dde88661dbc51b37b3f0bae7e69574a9921aa686c40d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/NLC732300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d7729271f93cc982e8c7fd1bc571c1b7e3d3cc96193a9c3d52fe423593cf88. 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/DEED72300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f1497e190b56fe33f3bcf1f22705b4c14b0b50631db1d764615459f24ec9a5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLD682400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd67010e617e414480b493dd9c72f2e7eabf23c38159e608ec887f4aeb529d. 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/NLD682400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96aef59aa8d5608cccee338b6e8a33be523d173da468bd35e08da489d1cdd2f. 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/NLD682401613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac3aa1b2bc284459c7eee802c7789bfcb47892c62585b179b6a119b6fcf281d. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:52Z), 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/GBKQU2509572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357415e7434291c8053ce4ff343669d6d603bf5a7619901da364cbc4a189271. 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/GBKQU2531526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b483dce66d436b53f2aad9da416e2f91d40e8a3c59f6caacf9fb75fded87e. 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/UKRMQ2000892.