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 0xba6d3c3a888ae8b4b3dbe14592cdb53b798f9ce687d5d4f242133be3ce615cb2. 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/38c0d758-92f1-43cd-98fa-057887eb461a.json and https://artists.proofprofile.net/proofs/artist/38c0d758-92f1-43cd-98fa-057887eb461a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tu Perro + Ladrando por Radios (Edición Especial)
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 0x6ceefd0c68430a9be21bd9d5a9f6636e73bfef891e29eddc455f768127f7ffba. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES18C1801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50406205cef1a0ecf79d464ca9a03f90fc42ce43e92dee66c99a4be8f814ab2b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES18C1801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd414a6191de438a819e85fdbeb89a5dd6d244e029b27ac4a95fe7f485b973e5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES18C1801007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af411998656e376fcad5572cb5d7c7405f7bd0db7b0bc3976b3aec83d85965. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES18C1801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf1bd1a3589b155d95b0891c2c7cddaff5a1665e8dd92cf1f447f0ec26e970. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:43Z), 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/ES18C1801015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ea093e3812e5c4d9e458cc024b5e7e7c040b4a35fa3ffd95ebefb9ed93d789. 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/ES09S2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c8ef3fefcf0e6c03fb24966a98023f808c1846855558852c028a2433155976. 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/ES09S2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f9e49a78e5e2d8c57662401659b1c8c3f6e5f996901a5f220bb636e5eb378. 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/ES09S2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbde374144087bbe6af830b1ceb92fee2b26cb21ac8602f76cf1a63e7204336d. 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/ES09S2200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc7ef1fdeea2af2deae7aab5f67c5a08b7b2a80d0146b6c7954b2f4d2c58cea. 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/ES09S2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a14150bc8dff5c8c6d6fb82781d3caf5069ca7d48e644c15e6cbd47c38848f0. 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/ES09S2200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfc73a8bbf9a49138a326c954a607f03b2a4545faae6e098d0aef6a3ebc8aac. 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/ES09S2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694c2bcd2e3d6c8c14274511ffc5cdf4cbb46281c155e204bef3995b76a16a7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:28Z), 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/ES09S2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36e22855483612be1d6e164ff2ee5e8d23ca1fee77fc7072eee7e9697396dca. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES09S2200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769243b417cad5b151f06316f987d6311bc30c635e5ddb350bbd26f571cfc55. 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/ES71G1833603.