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 0x3aa9c31a0a1a3b5a3a66a543cd3312e6a83c849b30cbb9a8643bc3c1563fa4a9. 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/7320b7bd-dff8-4825-b486-7a9209119724.json and https://artists.proofprofile.net/proofs/artist/7320b7bd-dff8-4825-b486-7a9209119724.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 0x0294674815109b86056fb6b2419cce8257dca52cc5e48efd628cb4ef3e330c1e. 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/ES7739908314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f63c7e4cf9801495b7b325a4c517377982172a7bb2f4e0f7feadba2ac7c7e89. 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/ES7739908308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4727d7e686cd1697d6c92fc7d7ff15cc36de055d1e7f19ab52c6ed1aeeacf27. 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/ES7739908306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcacfacb2d8d3dcb5e0441339596174054f1f4b6742efc6e5301d301f77474c. 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/ES7739908311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d5bbf1f6d95329465599fd751f93d9a0d9177b111408175385a6ef410c58b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES7739908312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a748c3b9fe7b93f7bd68aba40ae2afd336a9228a9f46782b779d3f75ebec1c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ES7730908027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588ff6b0df9a407f0d71ca95e12733503ed33b991c2e06aa280a7b627bb3849b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/ES7730308658.
Amor Verdad Belleza Pureza (¿Te Acuerdas?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396c95074ab9bddb05abae702625bf7781113881fa1ee5ccc49ae00008f33dd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES7730708490.
Amor Verdad Belleza Pureza – Love Truth Beauty Purity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa84d3722c42d1e484bbb89732d42e41fcac0dd12e7f51e1bbe02b1cd73cc0b4. 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/NLL8M2002064.
Secuencia Constructiva. Pilares, Arcos , Bóvedas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94bc90bcff73fa8317aaeb2ceb0a59c5886f3835632ed5c1e6b48fedb72f2a4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES7739908298.