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 0xf1f940f8ca1e004ec7d45830d052e9ff190f7f973cfed96431de6c2e318e7eb4. 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/b9ce6c00-9df9-4418-aa5f-b5151386d38c.json and https://artists.proofprofile.net/proofs/artist/b9ce6c00-9df9-4418-aa5f-b5151386d38c.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 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 0x0992e6e011f580913a605d424fba890d4d316e47adf5cb38ba45d59ae97f5620. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR10S1917927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb552f7c612140e40213e019c1405fc287e744c72a880e681f0f5d3030af3fad. 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/FR59R1939945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40446a662f8fd6f88fc228c39dc4ab5b7d72c97dac3c346c1ace1c485423ad8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX281961418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca0640d0a93ed3f933c3142709a271222db0a55d4b0c10d4409282e986020f. 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/FR10S2042812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a4131b54799df2207f5484e947c2afab4daa576e1d67850ce88d7a219b3b4a. 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/FRX762016424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a7cc991c2d67d2f5bb03b45732ff414ac49aa46f9f6475f78c1276b95cabfb. 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/FRX872302389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf3456e9d9af5fe975bca72f1f0cb65efe312ac62c9e04d8a9fcf85e42d65d. 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/DGA062329598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64bf9725bcdef7c05958c69eca2510b2a3dd7c7f0b870c89449ae914409df94. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DGA0P2359813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976a9a4b2bd0334600c4822aac6e0fbb0bb83cefef9bf35afda1a6b23d373764. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA0R2310496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28c6af83f6d7bd36102d3f8327fc26bfb7dd7af4ea60ebd0d540ba75ba7e44b. 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/CH7812423954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd61456fc71a3342552a818da2c9c49fbbca549ec60eea9bf847913696905787. 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/CH7812420631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825790d77e15dd87f69cf58c7b3340712c88ed52bd324ba773f877a42a22f11d. 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/CH7812421312.
Team Dorian VS Team San Andreas (Part 2 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77c6deb2bb692271917e5f729f40e2a5447c338c42220bb700475cd9c3dc354. 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/CH7812423480.
Team Dorian VS Team San Andreas (Part 3 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69415c492e14cc796e1627178a5ee60f3d52ab880a93ad15c2c58cf876458a12. 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/CH7812423481.