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 0x1cb3bebf41462c0c0fee70ba4e6e3e7b717b78002747bb64362847563beb1704. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0b0d804-f44d-4929-9fb4-895fd12dcf0a.json and https://artists.proofprofile.net/proofs/artist/e0b0d804-f44d-4929-9fb4-895fd12dcf0a.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 0xc73f89769a37e14449580f531f2bb565dafd2dfe9ebc7a9654ab6ff738b13cc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB62261392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8b998fe12318b9a508b2cdf1c986d637ae6591678ecee320c66f3ffce6de1. 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/QZTB62261394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790d70200a925bd3da4f5cd9bc27c40acfd710a1a9bec85150fdf78d891e6fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB62261395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e876bb567c97ebae4fb31fde2b3c4fb1a7ec95331353af51d98e10a22c12127. 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/QZTB62261396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06302163aa2d3f3d8ad45f38f1f6bdb35dfe5ca2f4f0ba5d877b12eb2551c4c0. 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/QZTB62261397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd647e52e99154caf274d5de58178fa939a65517db7dd0c15a314a8009afad425. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:52:19Z), 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/QZTB62261398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a24af2b4f3ea1823b24fb97c7f1d3c7c9640f5c32c07584a69055f07b8bb4. 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/QZTB62261401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b7a8cd517fa825e21167c9278203a98f0667bf2f0674aa809bda58380ab99a. 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/QZMEN2370195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dafd94532af286b6635b02621d0e11e776e827031099367aa4ce9feb4b9f19. 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/QZNWQ2279898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09465f619d8d7c10fdcadee65a7678d077a0e044835626ca52fdd97f90469114. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWQ2279900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028a8e978d9aebc11ae578c73352cabc7273cf71395081bedfa84ddb26dbea8. 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/QZNWQ2279902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0186ed51919b30ad5971ec0cad7d1ddce8754563f399a5b47f68dbd7379984. 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/QZNWQ2279903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda414d278e0dff6dad4a11e73cd3ba119711978e697810f85941febb3166469. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWQ2279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0134008a162a0f63597c1c921067c15ed561f0eadcb293eb55990fbbff398. 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/QZNWQ2279919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378057d8bfd8c8cd02015e773f8e9707c7619f06f4b0390a3d249514bdb7117. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFR2329159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d50c90b67ae3f35228734498a0ca7f59ed44cb71ff227809d9b41e9e85a094b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFR2329160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a851b258849d31aa340b7c1a8158d3e0d8c543b2e26ec301b3766d140a3a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFR2329163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13de5c6f054aaaece5fef3b60cb72c1075b14b8b9bede22a1a2ea0956a73358. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFR2329165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaf99c3d88d14d94ff6a5ef37da7b8d27edab78de66b45b0e874940c813d570. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZWFR2329161.
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 0x4769d44deda6e3f0c32276e712bcceb8f103f5fbedc8ffe46920bde7d62b4b1f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZWFR2329164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5a014b78f215f8001156dd629630b6dbd23bc4e2278b0a757e73fd81220c91. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFR2329166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f65c04db8504054f64e9443a21dacf66ccf25a2103303ff88b4f91e4253296. 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/QZTB32412058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d3132cedc800944263b8719ffb8125abdf49a271f5d0c171901213c5e6a4e. 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/QZTB32412067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02944a1395f4c49f2734f38ec2865f9559ee2bef7031bcdf22007f55ddd0513. 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/QZTB32412069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca994ddf33c684a67d6c731e3aaa4371560c2b152a685a92db124c84dc5b4b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTB32412056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd96935bc2a55bc44fccbf8a8fce596001426cbe66a70c4f5c15e23fb56c4aa. 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/QZPEW2202087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e1320c092e2e2782e7ccfb3740fd7b120caf131a8bf30a93f6e516b53a2115. 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/QZPEW2202088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277018605cb9f89e232100b5811ddd5b8005083da9745cc6142cc7cdf71fad3. 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/QZTB32218335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27468d57649ae7a882a02f987c1299b3c467d997f845bc670f66333cb13a9f3. 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/QZTB32218336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb0e32e75d35de5c86ef853474b69810687880c0cd09ac71ca6cf611ff7cbd6. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZTB32218337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591813f7abab779000824a2fa7eaaebf041ab79e3f830a53e0197702dbe5745f. 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/QZTB32218338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764fc264a663720ef353303537b371dbbb4523ec45f3863ee6a99011cd87c9c. 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/QZTB32218342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49860e1815a51cb2227ba7de6ca638035caf45845e5749fb8b9dfa3e6d01d8bd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB32218343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee5f33564f0428f5323b79c76600148f1a9d8e6325face2322ae1eda6f6cdda. 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/QZTB32218345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf02f1a5a24070d518475b32e901c11ee1beeeaf89cbf70aba9016b87d3623e1. 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/QZTB32218346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc14442d01d350109a0d3fc94314404f61c86348c6c8701fed6948a6d2f791. 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/QZNWY2223653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd0a8358b7261af3e61392021b46a97e125180004a6b81e8c3a3b4a9209e8bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB32218349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a122d5ffa9bcd45660616f5c00482d6099f6e37d5602e0415118367f2e8e26. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTB32218351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80387325504419406c46dd38afb9ca63bd7ae402dda441dd8d127fd35d1c22ee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAU2350683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ca47882f58679270946d8add2b18cf4d8a2fbb4867c37c9037fb8d996664a. 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/QZNWX2154896.