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 0x9ec51eaff84510ef5a1c98f2bb93a63f76e2722885b07186128d1bf6e14f42d7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5183a8bb-9e1d-4f01-ab6a-20af31034585.json and https://artists.proofprofile.net/proofs/artist/5183a8bb-9e1d-4f01-ab6a-20af31034585.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 0xff14f04b8830b3848934b52d9d374d99eb57039219e89181359a2b18353ec363. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ARF051100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff14f04b8830b3848934b52d9d374d99eb57039219e89181359a2b18353ec363. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARF051100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b83fb0b218cc22405f139e85beaae9f8c235927cf6a2b271449ba0cd47bd0. 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/ARD791700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60cae94b2688f8e4da1e0be1b5b1dee3fe9cb0eca18dad0315685be34dfeb3e. 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/ARD791700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6093ab81d48840087233f15f8da277b523d8b27ff9b5722ded54403bdc61cf3c. 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/ARD791700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d645136e356796f0f69a48295721601fd594e3a10bd2e33cda138213d9251a. 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/ARD791700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a7d0edb3413a074876609a1b2359e3c3c8496ab7932f0896a354130f5af08. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARD791700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6694cb7536257d80d80e9d0bdde0f7e296507711a0148885c8db191ede5f0e0. 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/ARD791700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04797d1a4a7e14289d06707b5ee492dab158451abb610322cde25a0a611dcc15. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ARD791700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05af9c36a8ca9f555fe20daa44a36db2e4fd9a3feb945d0939412c433e56665. 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/ARD791700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a00c31feafdb49da80cdde2095d5e756ef74c09cdf256931f537f9dd608c07. 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/ARD791700009.
Cambios de Tiempo (with Las Pastillas Del Abuelo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b0f7ddc0acbc2234e1a017c54397789bbdd70692e40695eed1134bc8c356d. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ARD791700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094c777e65101121f79dc57de9bcf23029beee0b5ca32f66d7dd1e6f354c38f. 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/ARD791700011.
Oxidada Argentina (with Las Pastillas Del Abuelo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3f796b11a1a09f32b055257a1d0bbbe416254f268aade20ae2ba465bd4d6a5. 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/ARD791700012.
Paren de Matarnos (feat. Miss Bolivia & Adriana Varela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509e119d66a5b750064c4fc1fc4c6baa5055e5bacb1fcb760bfb8416749d19e0. 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/ARD792000001.
Arrancacorazones (feat. Mariano Martinez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4b36aa2c5d6cb0f787c8263372b8c40b5386b9f63eb84ba3606d73a4e3f03. 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/ARD792000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec775a1e57d538b6039633aec8dc7eefbe7ebcb7b218790de2af6bb8b387b35. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ARD792000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62555d5e7379df7b2701287b2a1872f94eb6da9cd9d9ba07cea878bd8980cf3. 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/ARD792000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c14eb873f97002269063a52acc5a0f32c4ac7b01ab7ae5c75d9c3a3740793c. 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/ARD792000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a7c5af9ec780e7de26d7e98f631fec6418c8c8f71d22b34849c1018886f15. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ARD792000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e36231e4263e581bd34486c2dd79d8fb1197d79b7066e74b49eda6065d0f6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ARD791900001.
El Arte de Sufrir (feat. Responsables No Inscriptos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486b08c15229558da54601b27fda59f6f117012674734dec7d064e3fda800e8. 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/ARD792000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97ee43584f8147fc5f5203eff3c178c494a1db9ec668e9bd89498cf358139cf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARD792000008.
Chacarera del Exilio (feat. Raly Barrionuevo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbd545950fb9ed4917424c2c1e0fb2214f0a7b174dd53bb780e1b8f468c865. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARD792000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f48bc4b266453a1e82c903aa9e113de9a0cc546edc406399ffe4f1110f6fb. 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/ARD792000010.
Desencuentro (feat. Malena D'Alessio, Adriana Varela & Victor Heredia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4a1690a457238209b2f637de11d60763883d5387a7d1f64e5799d8ce530085. 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/ARD792000011.