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 0x3faefc434e1d10019a7535a9dc79d729fe8c6d7f277ed57c748302269543bf01. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb76b1ec-3788-4d4f-90c5-f1df7ef3ffc2.json and https://artists.proofprofile.net/proofs/artist/eb76b1ec-3788-4d4f-90c5-f1df7ef3ffc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Marimonda (Valeria Charris Salcedo Reina Del Carnaval de Barranquilla 2022)
La Marimonda - Valeria Charris Salcedo Reina Del Carnaval de Barranquilla 2022
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 0xced0bf84a6ac629b343f04fc62957cdbb56eb0c593cf7ba8a7766fa026bc8018. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA012211350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd17512331eec4c35a8a1c467cf830a6c96be69b14987881b80b9e24cb472fc. 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/ES71G2314725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4cfdaae5f4bc0bac100058035443fbbf368b9f89d040c6c47f4ca7cd866e5d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES71G2314723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141645eef26916161b6abd75a83c45c3018b74b1849bfb67a4c0e677869110df. 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/ES71G2314728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c904b85c0bccffe6bde8d554f9207f556120a6b3402247299858e3c3c7ec2f4. 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/ES71G2314724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb8cc24872938b1d88f960ec0a9225f71388407d5db079fef519a82fe27014. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES71G2314729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa22c6bd34361a89a4c86f20d294d104259083d616eb0fb2aa69f4fc08ef2e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES71G2314726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69494652e2f9ae8c26d30ea29ba397876f1a2d4b6e4cb07f36d159643f02a0b8. 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/GBPQS2400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c16b26261d0c9a1b270ba624d6a77bff05800f2e2585c1df5a0dfd7f9cb93c. 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/QZZ972462313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a3a93a90044cb401df9414adb9593256b65997836a838322e8a1a5df56e9af. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBPQS2400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550173cb051f510185ec2fbfc7ee3430797d898ecd3629d9a4c045e709588310. 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/ES31E2412150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d036152f8e57fb309a7e3b8dec1476e9dbf344c51605b795626c4e91150ccb. 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/USL4Q1815066.