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 0xe3e0bee53de847e468fec3712f51197f0e85517cba5cd5c4b09816a1d74191ef. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09676159-ebdb-48a0-ba00-deec599b3e23.json and https://artists.proofprofile.net/proofs/artist/09676159-ebdb-48a0-ba00-deec599b3e23.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 0xe077cc01183fa126b6c2746177bcadccaeb57df0d6a1284e57ef090e0db84b3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAN71360049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43318aa785f4ad6227bfb4fcca09dc74e70ddfa881a2959b048870698100022c. 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/TWAN71360050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524c322f154c9ee043933fec15ae913e6720ff5b6f771ca04403ca903140e5d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWAN71360051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55982a88b07ae532edd12e335031064baf3c3b14b27567e52a5bad1053d85763. 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/TWAN71360052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4101fb333d1e777bbb4acd2f8f6afa063b9fd31f39ccfa27a72c305bec8f39d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TWAN71360053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d6692dc6f49524ac4e81998009bdba8cc95ae9614f8bd540ebb4c07e900185. 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/TWAN71360054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7684bc2263c01a40f49da1c7e1a3116ecde154dbff9f50f02611ed9aa07b122. 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/TWAN71360055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491909e0815a1342c6407b1fdfc7c4002ae41d3134fe3710616faed4c605248d. 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/TWAN71360056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acf799f19727be503955c605ee24e04172a806e3f7a87d9de3f8555b6eace65. 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/TWAN71360057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1dd1a82fcee60f0f084523ba8d56d5c6e900d2f4b707553aa2f0a99ce95c2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAN71360058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba6cc88ef877309850517a10ab0dd11141c99f27d63dcb7c87a282403a2a322. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWAN78690124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d59c139c3bb737a9437c74c078301b642a31016bbe65836b2907070fe2527f. 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/TWAN78690125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94322c1f9f70c1427ae54f350663903595921001c4bed3053e7c50130ad35a2. 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/TWAN78690126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e75c6e773c88dd6d2eb44f3efec5e6fc61539c6b2fbf15f67adc7046bfb277. 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/TWAN78690127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60a2e476c6d6dc295761927124805bd45d24cd325c020721af5f5913d4ae033. 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/TWAN78690128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12032828ffc7d32a40b42f6eb93414582aa8a3285b002861d996eb78c40ab763. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWAN78690129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4906f503b31288e1afdae74e848a34511de563f2442cce731033c4f03cc4a2c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWAN78690130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45906961068a6824521a279cb641ddc46c29e6b3e7780789b11ac97f368a41e1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWAN78690131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bcaf6598018a964cd7f38985cceb1c9f2f3d6893f69e7c309a6ef85e90a096. 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/TWAN78690132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c58b46e20758bdbf84ef9b6e026bf38f81620e1b2bf0ef10e8b54b3de84ce. 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/TWAN78690133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e7f5a293ae17337de1d28361b6b8c6f27d033151a1aa575728384ca3e47a2. 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/TWAN78690134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4271bbbb17266572e09595eecb0637a9cb53e85b9018eae7e0e514601c3492c. 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/TWAN78690135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26b8b05c0159a0eafacb66b3d78b1a7bd91a62cd3868a58c1cfeb9649011647. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAN78690136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1049af78dbe2117aaeebf2db22b14e77c051d9f581f610d7f2064bd093ecd2ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWAN78690137.