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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b772da765d41ce98c35ab43e9287dd412fed9c0e16c03186aa94dcbc5b96116. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5af9656e-bb97-4d42-b27d-153ad0f2f55f.json and https://artists.proofprofile.net/proofs/artist/5af9656e-bb97-4d42-b27d-153ad0f2f55f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92ce13e44bd239b0aeaab12b5c14f8d5940e62fbcee635afaeaff8c851028b6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5AB1956928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d247e14581f0b349f5d6ede5c46a22d52a9fb30416d0b672797126dc71e47. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:36Z), 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/QZ5AB1956930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416ce6e52cc1a05199363d0b16b063a6bf112236b56d04f9cd8bd1adaa3db58. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5AB1956932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87c14a522512983bd220c6556cb5c21f9a2de08c0e679024bd2de7e2c549af5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:01Z), 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/QZ5AB1956933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8d326637523427513c777f4973d0c3aae75707b05f98b94b5540cf7ffd001a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ5AB1956934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe46635723916a20ad65e5b5ec867e2d39ec128666465164c1d66b2048dcbe3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:23Z), 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/QZ5AB1956936.
Chant de la promotion Colonel André Salvat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe54741699be6a1abacf835e9b843ccdc88fb5bc08d3b0ccf398c77561eff2b. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZ5AB1956937.