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 0x77e67b6820bc04d2b576d511f94dbaf0fbd68b6232634b88f9d6be81b2769321. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d5efb2f-3f91-492a-b30f-8ca8f3fe3702.json and https://artists.proofprofile.net/proofs/artist/9d5efb2f-3f91-492a-b30f-8ca8f3fe3702.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 0x50e94bf45c996c30e1e0384fbb3a790e977270070a6242bad8955480feb2532e. 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/ARG601000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38bee46917c0e931ef1029cdc839165795f19843d5813530dfa12080443926d. 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/ARG601000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4823faac418e491fb0f418fb670abf04d3b817fe716a7b5690dc0597fa7ef0. 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/ARG601000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d4a15f7635a3c8d84372805746eb73cd2cece37383099ef26f282a4f52b2b8. 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/ARG601000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc97a4e66d1ffb30cb00ccdcd8d5f75c3e3109a2660db5c7231e266f50fc6e. 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/ARG601000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fd719314120ff5710a8012af3e23d75c04e54a44128120654e70b3c286dbab. 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/ARG601000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01ca16e80586beba37b6a402f2006a90f645aeae3695b57ea8433f718b49a08. 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/ARG601000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40be42f110a445ff63ca8b6efe60cd7b981128fcce2e2b7bf85b88b2e4f8a55. 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/ARG601000355.
Escondido de la Alabanza (feat. Carabajales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9276c87e10452a75e82a11b1d913f1086dab1c15a324356c894d59a7ca3ac24. 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/ARG601000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59688adcf52ed9e2ed78473aa0c9ba7fe24cc09f83257f5367cc9a9c3afa61b. 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/ARG601000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185f4d256dc25b5992f213e198b462243539d54014d54bd9dc104991d37fa4e8. 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/ARG601000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6396651a6fb43bb55aad6116b165e65bf95f8ed1aca24b6110331c5a90692f. 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/ARG601000365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0149c0ad9f1236cb4c6c51c100f538b81da5f97c8e43f7f2a35517267fc3a52. 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/ARG601000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff71a7ca2f5a2246e311974998ed92f671ee0b59ddcb3874c83e21dd41cb3f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:02Z), 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/ARG601000370.
La Cofradía 3 – Los Elegidos de Daniel Heffes Cantoras argentinas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126d95c6c517b502c290ab2ba6e9dce5a0b9736b695d3d9c234fd3849a4cfa5e. 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/USA560307124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b677273d8c129ab46cae217d236d0f87e2b66d7615ce690cb2317aac10c323. 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/USA560307132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4409cc6d6b804205eb036e61616104209ed31e2c5203c7ffd13b3ecb39936e52. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:05:04Z), 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/USA560307135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916e6b935ef98b454ede4c41032046c1d913efa1ccaa8bf4e34926d370411cf2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USA560307136.
La Cofradía 2 - Los Elegidos de Daniel Heffes
Quedate en Casa: Cantoras Argentinas, Vol. 2
La Cofradía - Los Elegidos de Daniel Heffes