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 0x13ecc8f5f694375ba37c2e308f66ac9038c7dfdf7383247c60b4193b060077fc. 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/c75ef93c-6ea1-4c1d-98b7-9be178b0e5b7.json and https://artists.proofprofile.net/proofs/artist/c75ef93c-6ea1-4c1d-98b7-9be178b0e5b7.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 0xe4aac3b2d5e7650db1193bcbd2b3b6980f2c537850893bff3ab13067dcad7229. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FR10S1940325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932c475719333fbb51e3f7883e4a70b086eac7873f470f01eb217f63cd905eb. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FR10S1940326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3e5661585cdeda456ff55b827cc652776da0fe873e05e8fecc540a73cee956. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S1940327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74847345ce2b3afa9c684a91f486b03f9cbd9391e12a2feb8be3fc682839c544. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR10S1940329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb273a964f912ed78f7dd71b10efe8790f2cadeeff42fda745dbcfe7ff8b596. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:00Z), 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/FR10S1940334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52ec032a392b1f404d1585e5141051c935b9235faa773225021c16e707d570f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2X41968849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa678bf9f513411e932c9164d274c620bf50eaba9df95803b39c156bdd57f9f64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X41968850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d51de569da1bbd9dcda3c47832639dcc6caf33e989c60e309835a82f0eaf3ce. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:43Z), 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/FR2X41968851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992b367a4088ec413998cda7763d1f85cc7740ded83f25cdf1876cb0a77900df. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:21Z), 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/FR2X41968854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118319836b86789672c0900a6322c0408b9f814dcfe0fdc01fc67c1a1b6bdee2. 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/FR10S2053396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c979de7fabfe05d8de920f5550925fc1659e059f2c9eeb7b44453f2240d9c1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:29Z), 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/FR10S2053397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3f227c630730cd8e7ff45886237de860e266632ab70e2b65ff42e25bc5f2f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR10S2053398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9c7126880b324a3fb7e55578b37773770b924c33d2d060473d1837cf8208b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:11:16Z), 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/FR10S2053399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fa356fd94ed235d73af0db41064be17c3ac83e08633805fb214cef265292df. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:30Z), 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/FR10S2053401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7230490cddd283c96d200079f8d583632b7d211956c7ab5620c6e029945d26. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:23Z), 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/FR10S2053403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a795c92d7a1e0069d2d815f9405cfa73142030852d670c794e9680cf0f8b7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FR10S2053405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42710788b432b487917003ec2c1ba3985c5a74d1a98376276ef2fba60f5edcd0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:05:57Z), 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/FR10S2053412.