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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8f17acd175d59e9229032755e502281cc53e6e15542412499b9be12df02b11. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ab19bab-efd6-4d7a-a39a-04d34dc38652.json and https://artists.proofprofile.net/proofs/artist/6ab19bab-efd6-4d7a-a39a-04d34dc38652.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13de8c0a4d13fd128fca683d26d8b467fc08cd7b5dcd8bd6106d38cdad21fe1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARXP71600629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7132b5a6d5363b9054f7a11538cf36a45a286317262229c224031111e3f77011. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:02Z), 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/ARF109900896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab81f173d7e662fae57d3dd48a11df6672e801a9d6e7827c2dd0df7fe61997. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ARF109900878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887eba6885312d7d13cf3c2a0c20892bf8a2df2045bb3ddde35092a5f0937462. 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/ARF109902933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584a844a7311a041a853fe2487d8c93c5ba083f82efe13b2948f5597790f202a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES71G1879432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c2dec68245365eed1dbdbaa9b45829c605aff49453e53e844325e2ff8e6e0d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ES71G1879444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd498f790840ef034f001eb4aa919568c2bf615c44a443f47466e45a5539f4. 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/AR9VI2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdb38d539330de2b1b9a24027ac795fee3aef5e65b1a9fcbb1486764bfb058e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARG990901755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10dfafc3c2502ca0ee6dbe16a0efd55ec10bc5d431932a3d6386fee60976e3. 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/USDY42181033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959912b072077982e55cb4e3921b158731f72f4528de13710ff728e5037c4be. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42181035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c3dede4ed712d07f9920ed6317be2cd3d5625b49568aee4fdb452a847e96f. 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/USDY42181037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7addf96bddc174032b22cc462d6cb8a3558faaafa273a4a685c171ccbf4f70. 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/USDY42181038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc092eab51e7a65a2746e63a92b710dc85039a534bfd04e66c1bb31247ab6c39d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF109900873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d5d5b0f18f8926391cba92e5570551dd6ee1c9f93429e244ef120ca786709. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ARF109900871.
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
Zamba para Olvidarte (in the style of Mercedes Sosa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb727f8cf9a362326efa3eb6fa62862f8919d4b8e5ae50b329ad6600338da9a6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEAQ72148806.