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 0xd6f5134b6b66cef32dd56743fc676c4dc0b46ea6b04cd81a2e6ac82a9dc77132. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b8c7617-790f-45a1-a9ce-e93666b30d6b.json and https://artists.proofprofile.net/proofs/artist/2b8c7617-790f-45a1-a9ce-e93666b30d6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gonzalez Toca Gonzalez: Suite Colombiana
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 0xaf3e07abe12074aa4323111fbfb69ac88a988e246aef5e12b927e2287bf0e07a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHR2331121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6210ff8ebd98747a4b21e240ecf44bf876b709d1ed347b82016e6910c9580fca. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAHR2331204.
Suites Colombianas 1 & 2, Tres Piezas Mexicanas
Tres Piezas Mexicanas, II - Mazurka Mexicana (La Cucaracha)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4deee5a57247243676599e69524e9b992c5f351055258acc7043a70b446641. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHU2405371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d51d1e556e83bf4c13e3826f2b980b2fc56c3f0c3f1c5fc9e486f2327eb7ae. 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/FRPGB2430280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1298e0e1751926afd57beed176101c0d76f2dab66b0ab84c035ba47cd33f11ef. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR6V81910919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee03d9c42813867fc194ac9adbeced9387c6a29cd447470aca0014137b1f8af. 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/FR6V81910920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bc7fb450cf0770222afaec5e271d6ead453faad48bd5a3d421902416981183. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V81910921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe542a4dc3120ecc293a44fab0ca2b42a35a7642cace4aff5fd045f38837a8b0f. 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/FR6V81910922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625acbf2848f0d8eb0318ca96cabf4dae94d865e544848d99decbec2f7ac7346. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR6V81910923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8baa5b5ac9b08e2d4362fd53cf1596494d5cec22cd927c248ae8b044f9fcec7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR6V81910924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ddb8a1bc101c7d207896bb62741a8167618101f3e65335f4337eaef431469. 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/FR6V81910925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9499fc8082fd436a638392f28ae459555c9b8d508e286a9d32a2750f594ea0f6. 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/FR6V81910926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b8be16a1c2da4f47348f9bb1d8e79b6ef3391bb3681cde057abc8d4f7f083. 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/FR6V81910927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db973ed0264993f81d1b3c4493516c93f7eb3f066f35957854fbacee16bd025. 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/FR6V81910928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14fb72e85b8b484055ccc70a0fe351d2ac170488ad78802d0fbe12b5a7e5a02. 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/FR6V81910929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dadbc7d63050abf3a95f875a9a5fa69c36d33c34603d03fbb293b66f3737786. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V81910930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f031b076450528dac301e5fef7fe10084431407a2a5cc5cba23d7b66caee8d. 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/FR6V81910931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b82cf4dc699e532ff04a9c5652a50df188dabaac69bfb4263024ee03423d1b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR6V81910932.