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 0xf3ca48f8bae28ec7a8949b9d63e273c6d49e062e164a448ff7ba5e8c7a3e6e47. 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/26c5e085-eb35-48f0-97ab-bffb45af8138.json and https://artists.proofprofile.net/proofs/artist/26c5e085-eb35-48f0-97ab-bffb45af8138.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Historia Musical de Lucho Pérez (Lucho Argaín)
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 0xc8d991c6929165450f8576f6f394f6d207932df493ab09889bab087360d46575. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/COF019501062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3185695c8d9fea24a4b4678e8504ba35a8759c6c21f6cc4e03bc8d5341504. 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/COF019500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970034f89a9202d6e9af9fdedb54eb9b78ef9ce516c1551fb3b62706ff034bbe. 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/COF018200529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b41f9ef0ce66daf6efcbb37198a1dd589814320f5d99af53a2d365afbfa6935. 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/COF019500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ca8de8539d2de3f6c4e8378742d6f3bbe13581cfb6ab5bee053f7d2644830. 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/COF019500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169746a0d32bd2ecebb4087c44b136b3647721aef5cb93f90f818b9e8ad9977a. 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/COF019500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d991c6929165450f8576f6f394f6d207932df493ab09889bab087360d46575. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/COF019501062.
Greatest Cumbia Classics Of Colombia, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1eea3f7e842a4ce3d0d943eea6f67301f7e9286801f1476eb7b3f997bf75a. 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/COF019500614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32b263ccd2bd8ade014dcaf63390aee0b728d655f125e822cf32dcf48171c7. 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/COF019500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1eea3f7e842a4ce3d0d943eea6f67301f7e9286801f1476eb7b3f997bf75a. 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/COF019500614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ca8de8539d2de3f6c4e8378742d6f3bbe13581cfb6ab5bee053f7d2644830. 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/COF019500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169746a0d32bd2ecebb4087c44b136b3647721aef5cb93f90f818b9e8ad9977a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/COF019500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3185695c8d9fea24a4b4678e8504ba35a8759c6c21f6cc4e03bc8d5341504. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/COF019500072.