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 0x7d8bc2c1f04a83bd544bf2339c7e780cda9fc3d62988ab6394fbd35aa436512f. 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/55fd8fb8-6b6d-4dbb-be19-da7392d9404e.json and https://artists.proofprofile.net/proofs/artist/55fd8fb8-6b6d-4dbb-be19-da7392d9404e.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 0xb9f6141428d6de569fdf8596fb4cd013c33ee4b6c55e025341e102e042a2d963. 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/ESA012148253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf248a6fd854832df0f140e62de84b972542e7bee0d44ad722b8f0c250d3299e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2150255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2108790fd2c0f12389509e98f9a7406ef4f3e65b8587f45e8c9b3dadbf3c7c7b. 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/USA2P2205615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42506325e0802305a66d433547fe3ff325c540b4ce5f187eb22025422b9863a9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZNW72206672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd2a79d62d5adeb6e0d0761e230e8842e3aa22f239a784940ee151265da42e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZW9N2204845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea4346845f3126f629913b647d7b1ce70d2d975636976cc21751967194fb384. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ662323658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c23a62f42f5f2e91ee38951a40342b914673370bc0131ba8ce2a10d1254570. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9M2311418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c19a3b608e31e555ff13086d18922b830767a77e905da8a99fe8fb797c512. 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/QZW9M2311419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfcba5cc465fb0f0ef9edda6bee18aef5b5fb5b8d73fe7ebb2e90f605b56060. 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/QZW9M2311421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2fdf054d536f495a1c1272b7215382e0e6c37c66211796ff75e73a205a1624. 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/QZW9M2311426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177222cbfe7c170ceccf44696dd19fdecdcc5e8f6fe6639607ddd91470b67759. 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/QZW9M2311428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13b6ab203c6746f4fead642c35c2ef6ca29481e43aa34e8c4a1a1c0f232fa3. 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/QZMZ92474016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e40a63d19ce2ae902393c983ea89a06335e98c653034b181782114d1e5a97d. 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/QZYFZ2502204.
INFRAMUNDO "El mundo de los infravalorados"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba04b9de4320bc9c431d23acba0947741d8ae73defa3ff7104b588010a74c6. 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/QZEZZ2000806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a311a705b0295d4793b53531fef73021efb89037c9eb859e19822fad622d01. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ESA012262844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb7e1574b7022aef3cb3c79571b9f20f73e827dff8b4d1e72fa02fcfcd80ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2435573.