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 0x3cac2fdddd51cc386ea598239ac7dbce8cc9a51240a8163c7240e5eaa27d95a9. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac43e1eb-427e-419c-8567-36fa41576157.json and https://artists.proofprofile.net/proofs/artist/ac43e1eb-427e-419c-8567-36fa41576157.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 0x90677293232cf892bac99b4f6c6597c002bb8db1d72bdb57f0f0fe37ff9fe393. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF101900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95e30fbc091646cc8124c706735f805af9e607b9cabc9ec3326611c0216742b. 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/ARF101900078.
Hola Dulce Viento (feat. Emmanuel Horvilleur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84bca2b986def55a4ea546a021caacfbb123c940f09cf68bd2417ad143be738. 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/ARF101900074.
Casas de Arañas (feat. Lisandro Aristimuño)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae8ea6e3cf005b76e8cb4698ac0284fe1b0d3d298c72d1dedf17317f1423e4. 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/ARF101900152.
Hombre de Mala Sangre (feat. Pedro Aznar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582748a4b4628bdfbac260b7529abc8f6ad5b09f561bdf203b4eb6730a1eee32. 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/ARF101900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890bff62b16f6862e6329ad169eeb5be1f85175705090413ce135ce86632b28. 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/ARF101900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9994f2b7f247e6e3184f7bbb1d0dbe65cee92e3c3d02c7e899518f5d7ac598ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF101900015.
Parado en el Medio de la Vida (feat. Andrés Calamaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d21e76d22171e22ddd860a7b301a1838a2c17754fb6b975b8435f2c9e0a9b0. 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/ARF101900076.
Dos Edificios Dorados (feat. Eruca Sativa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da83a739dc0d640a89fcc06542167425ce41bf2cc18909451f02ab3558367e. 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/ARF101900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13588e6657c02a1e6559e70f02f409c9683085728fed0338442d7c8428adf444. 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/ARF101900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384fa4ea86d701a3e15cb9de3594f245e12d878b10cbea4b9d6e7db91841f202. 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/ARF101900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddeb841b1e79ee18ba534596c2c74d83b18e08b48ea1c9794a7fcbe1e787d86. 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/ARF101900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f46716946a687ca5140dc8baf3e163fdd143a02055bc64f008b2c46e49ac0e9. 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/ARF049700232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b15b53c35158105211fd4447de57ce569839e7d69cd8f2a692743483cc15efc. 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/ARF049700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ebac7676433b7ce66325911eb7f5a37a34393a3635f84e52f6f0ea48d0f60d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ARF049700236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994687bd4229bc5a2c97b910a27544effe8d4efc73b184cf6cbe5dfcd9b6b870. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARF049700238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b9273dfef634d35a18bb0511f928e645a3293d52a8ef629bbb48ac5d71aad. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ARF049700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da99b6f46b483db305d8554a26bea7f4284ccca2ae33312f5ff12208376f0e9. 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/ARF049700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664afa0993a48d7ed4b5ef8b7a04f98985caa959fce9b5618d629240d46ecfab. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ARF040000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae620176a562fc48d8ab99b6cbce2a7d377086314e3f2db50552a81c3f089a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARF040100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf661c8ea06e62fa802b7dd9bbd9af731ade6a4040b517008c5fb3badd1865eb1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ARF049700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0757d6c5f26e2045af7d9c6255ae25429414336ef38d2d40842c52176ac7a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ARF049700234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20694a552e29181c645c613dd0d6fe1b5244ff9c176249548eb16dbece3142. 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/ARF040100792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab89d08bc20bfa08d1d73751632c0184a165017fe197f511eceaa74e3c2c0b7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ARF040100795.