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 0x9a640d79c0a6b7eca058dc8412afe29e4a5105436ea1e0464ab96f49b9e26712. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06e1b1e3-8f7b-4576-9ffc-98f64e017e04.json and https://artists.proofprofile.net/proofs/artist/06e1b1e3-8f7b-4576-9ffc-98f64e017e04.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 0x2f9e37963a979d61af90af3618660ef7704a2ca97abf67a19e4dc8387043ac56. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFN2397522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f8881277cdda3932a258b577673137dd903a3f5c636549c5bc5aa87f8eed7a. 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/QZWFN2397523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79de833039deeabdc131d872db24dd6bb8832c2289b1e2fc7150d3be287fce3. 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/QZWFN2397529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e44dccf31d58a76dd4ca079c9daeffd3e95cf66dc26f6a68998242051fd1e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFN2397531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ce575eccbbeffd47a9d9237d8cd0dc6591f46730c6214f7e09fc13455d977. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZWFN2397524.
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 0x232a95592c48874ae8485a35353430c84aab966eb1f540e165d025ae0ee1bd33. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZWFN2397525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df2512ca7e0ae06b98112122b028529c395be05b028c9c8768160b8b67f4b2f. 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/QZWFN2397526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714341874696b0830598f4051f0df950079eb65a3bbe650868c5a0124a64bb9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFN2397527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159dd393e449ca014371827f80466cd17b7939d94a5e49662e7aca39fff23d5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZWFN2397528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc611e80e6d67a111b80f138b5b92d039730128a1fed02d7646aed34ef61bdaf5. 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/QZWFN2397530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f3761b75d7440ce8a145efce1694ee96d8760be86687afd71dd294752c109. 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/QZWFN2397532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fa1a2c2e5b4b5a631425c510e172466adec8237ddcd871e4769eaca914c55. 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/QZNWW2069552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a032895a2ac1ebdc7ae25f1e1bea375ee31806d242d3f8cc5bc6e02616be13. 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/QZNWW2069553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6b5a238e9ef1fc09cb6b161fb01775ccc9ce16b3c96f07d4ab4a607657a4a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWW2069554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6272ab73dad588eb546ce0fa56228d35dd7026f4a517039f6505f901641dcb. 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/QZNWW2069555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bbf660dca0e48c62c6c5314905bc2ce88ec5e18c8372f49a7f9c8ca0ff332f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZNWW2069558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e82f93a16aa4b6e0c88e50656d2b2bcc1bf567427f7c790c79ae4d6fc1c3fe. 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/QZNWW2069559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e580944035d15ecc378e3493cc20a6048f4282d789bce62d4d68783f396e7. 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/QZNWW2069561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb5b46399acaf6f15554a56a6da8778743d11aa23088c55e7edc2155889a03. 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/QZNWW2069556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e16e701b9bee387e28798549e8c04d5ea15547dc81d8098a17d99d9beb677e7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNWW2069557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023e0f719f79744312c37dfc6a3da49d1582e28f843ce7abdc37a01282a93707. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNWW2069560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c84bac70cd6868bea658fc1ef6477e136b286178bc2ce070910283d9ab2da. 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/QZK6F2047172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe31d5a8c29952cc3729c445db4777dc6b9c9def26c804984daf255a030bce1. 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/QZHN92086854.