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 0xd17b41917f23fce1e46c16c12fdccab2b7f8521a0f3aebf46e4cc185ab3386b5. 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/fe362836-1a0b-41d5-826b-2ac73e3f706a.json and https://artists.proofprofile.net/proofs/artist/fe362836-1a0b-41d5-826b-2ac73e3f706a.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 0x9592abcedcf7cd35e6a49ccac54e426cf43c950001ada687532aae9d630d931f. 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/DELJ81817431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceff9cbbe9262535275b85b4567172aeaa481da960f1dde6cf7f7d2be73ef51. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DELJ81817432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d1db73d7ded5d4b9515a73458c02166b432313f445c5210793ae4c41d64a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ81817433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98102f3402d76f714332b2f65d3366fc5e2a13e24713e390c1747dbc42a4923b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DELJ81817434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd876e02947da3dd25d3ab192eaadf847ca1f616201bc7cb40630f532e039a6fa. 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/DELJ81817435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bca96eb9c33677dcdc8bdb91a3cfcf1509264daa9aa811a667f8158871106a. 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/DELJ81817436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31aa59ddd668abe699e20d29727029a31e39fa7a4fb9b242346d5b23393ebcd. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/DELJ81624328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff19d6ec9a097d8a1cd61b7a8c5568e409ab477333c82b896d87bda2e4d016. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEQ022116715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de7c320495f0b7df16be5edffa7fcfcaf667e9b98610718640354cfd0104e1a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6541957102.
ESCAPE THE CiTY (Level 2 - Alien in Transit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc740a6d9236b82ad9e1153d21ce86f15912814967274f0ae5431b4b9edd612. 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/FR10S2025649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5230fe1696ec0b2f24fd99309a742a503b84da0e437c3149e0f119d05258eb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEA811801407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d474209efcbd6cf4c1e0a80f8e1a239eac61955975c2e6f60fc24e44e2a92. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DELJ81809633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fec74a9b83e726de553c3e9b8f501bec5a11b26e37cf90dc6a0c92b65db08. 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/DELJ81884620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c781e2ccc19604a55d536b6d228c465faeb0e19728933372e5220e6d4bf21. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DGA072431683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c781e2ccc19604a55d536b6d228c465faeb0e19728933372e5220e6d4bf21. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DGA072431683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20883462c3369807d85f9131a3b480b14873485e83ce7a5b0a5ab236a496693b. 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/QZK6J2417376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a66af8db3d790f705159e0a6f9e7052ed7a451c23f41c7ea1ccbfe9b85e98b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ81945519.