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 0xa043a19a7a5019784e685b146c01069efe575744deb1bfd80c11e703d2cc5285. 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/7bedb2b2-af77-4357-a999-0e201fb47b50.json and https://artists.proofprofile.net/proofs/artist/7bedb2b2-af77-4357-a999-0e201fb47b50.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 0x8d40f28365420832d6ae90f87a115819f0eb27566783aeb492abc0dcc90770c7. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/UYS050000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902be698a12f8097d49e0500913004395a8148e5298374cfbeebadde677bc3f7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/UYS052000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b4e8d40d3c514ac90f7747268064e3578d46ca6100bde1985dea77926ddc1c. 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/UYS059400065.
Tabaré Etcheverry Interpreta a Tabaré Etcheverry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d7eb756052a640c61f2b48a2303e45058383d607b75603dc1b3f604653172b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UYS050000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd215074a2ec9aeb8c0552e8a2a89681f7c6c293b66f974a80c8c5ccfc28e8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYS050000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7139fb81c396c637fe484b3ff67351dc8ead9d27d047bd40e4ca0a8c377f00b4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UYS059400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43192987621cde43c3f2dc034310a9bcbbf05568cff9f983e91d94e8ea593dd4. 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/UYS050000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40f28365420832d6ae90f87a115819f0eb27566783aeb492abc0dcc90770c7. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/UYS050000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fcd11e72e3896837a40d3cd4f4bc0fb54795ff546022e3f83770e251d8cd4b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/UYS050000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484c84ed6b96405c2d5a26da928a849998552ee4805deffc4020a803a48aea0e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/UYS059700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d1cabed99f7ea83ea2c117929fd9382a4adb7a1100b810f5679f7171760b32. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYS059700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e6686894863d0e51efd473ba969c54dd6e0fc445419d230ec1817845435c71. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYS059700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7621b00cd924db862af997a8f07ebbca896b4b67fad6613fa3cbcc649a5c5559. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UYS059700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1d8b35fafbce0e00660e9424f69f0c713d48efdbe3e2b0818e49f434889308. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UYS050000063.
Uruguay y Su Música (Folklore - Tango - Murga - Candombe), Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1d8b35fafbce0e00660e9424f69f0c713d48efdbe3e2b0818e49f434889308. 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/UYS050000063.