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 0x48e5caaf31e5c21ea58f7258adece26395edcb978e97e2224984b3cb5f36a6ec. 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/022bcd72-8c70-405f-900c-477396c83874.json and https://artists.proofprofile.net/proofs/artist/022bcd72-8c70-405f-900c-477396c83874.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Canchero (Juan Carlos Godoy le canta a Gardel)
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 0x417b6d1beb68012d00c746ec81fff657ee9231a8bc8f578d58dfa13791a59df8. 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/ARA821401815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778260059525a854f184414de6ec328313dfcdce0692e5600590591209537c34. 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/QM6P41441807.
Zorzales de Antaño / Juan Carlos Godoy Varias Orquestas, Vol. 3
Zorzales de Antaño / Juan Carlos Godoy, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ebf08a448f85d60a43d932ca07d00a1e71b6dfc513dec41ef36fc58e9be2a2. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USZZR1014315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd500d8f44f1870af80e148d9b4a870451c0d3119e2f1c80538212e7af6e4424. 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/ARF045900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f59dd90e5c3778924ea7b690ee564cbc8cc74cac7fe0e30de3b807b4e5a35b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARA821401886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755728c8ac7cd88e83d6fcd29d1864e67e0684841b6ed85d1918da5729a5fef7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARA821401888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d5823fc8426886d81bcdfa65c91f45f0a5d5c4b4b2921b62b744340b2b847. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMFMG1391862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ea34724129e486308df0e88ca40be161bf402f6b3bc37fa6bcafe44d757160. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZZ42149345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd266df9342da7e00510ead7d35e621feeda4720161b72182b6f0ee99b3bcb. 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/DEZZ42149351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03de7aecae6efc77b5f6698f0f8b5ab8292cc445a3717fb1cb7683c4a151afe. 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/DEZZ42149352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb230db928d98930ed5910981f63f3835c68256771dafe32c4753e0ca28f17fb9. 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/DEZZ42149353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353dde7d8ffc80c9ef14ce36052a87d3f6064c099795b932bc2588ec16a5f521. 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/DEZZ42149356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad49740886ad5c4205390b39695827d14e65f3098cc308a0cf42041cd81a0b9. 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/DEZZ42149365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f9374b6c58c8de977a5451ff24a84f043297cfccc520a374bdb0de3384702e. 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/DEZZ42149379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa902501253026e0ec80563ac43c9b2b81ecaeffdaa81624827edfbbe72b31d2. 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/DEZZ42149386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b6c2aa23c296f5bef7cafcf408e01933c3086d71765f76db9b3c29ef824474. 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/QMDA62441281.