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 0xe772c1985811fcb95f3a16651134ffa55444a86a34dab309d6fc41fe4f318afc. 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/f1c03985-a799-4a45-90bb-0e55c293a813.json and https://artists.proofprofile.net/proofs/artist/f1c03985-a799-4a45-90bb-0e55c293a813.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 0x08ce032d125424f15a8cc38cdcb67e56c24d8b42a2b56e0edebb1fc3f4bed377. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2558455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f0dcc5e1f282968736b1a72d3e387a60bf5899f58e2ba4cb814a3f485696c2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2558457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007c9de41af90da45bd6db5d9dc12d0f19ee7ee8eb8524d8494a32c3c3102733. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA2558458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ce2698fb6e030ddf76745a587d426b4ac0f745af2a9cb2b20f696a3dcf62a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA2558459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c72f1c139d67e3189820eba002ac1663917c72163576e215aff171fb335a31. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:43:49Z), 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/QZHNA2558460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d484b947b6f5095cbc5dbc48a32549736df173ad833cfaaaf6dcda08d8322. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:30Z), 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/QZHNA2558461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50565f176692e514d2ce5d731a809b6e695e38f0dab3eb4943cb49fcf7243272. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNA2558463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde983b23f51bcd7ef48c8027c6686c731c54d84b4468de0307b884d4ef6a16a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6P2502252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4d6adbec4a1e9cc780df303dc1f7ec224f9cd8bbfe0fa39003456bec1c089. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:21:47Z), 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/QZK6P2502253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec3a303c348e467c4486d6e22c226c5b8d2905261186e12e83bd654c0ee144. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:35:31Z), 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/QZK6P2502255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa988531bf9beb4924ca9247cee2e220ce20d5b283ee7643fea9a3e89eda1c11. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:00Z), 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/QZK6P2502256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a45ca37e4ea8207e4378ba8d1c388ffa1be11a13f940a3f3c5be9b60c02cf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6P2502258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a06cce6073d84ac3bf777c801a2a1d159ad8bad126984d957af5b0b2869e88. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:34:33Z), 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/QZK6P2502259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5152fb3228ed7e4e463a37dd66669bfb90aadce60051d6a1ae38e474262362d8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:08:06Z), 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/QZK6P2507641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daabd334be36c79ed842228855c8b28e89ae33b728381bed4d1f154e461cb65. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:15Z), 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/QZK6P2507643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb362a77f681ec4c85868d7e1f27482e81b8b919139b39faa3e92660a4be698. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:29:09Z), 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/QZK6P2507644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8fe67b0ba11af8c44f8f7d5104035a773c2e25c25f96b1c88b47611f9c2767. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P2507646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf288375eb423107da2ee98c2f2366898becfc3bdada99622e7cbd81f702758d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2507647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9193979efe86f8220c0e0b4b761d39810ce76b9727b04e6ea90362902b3f130b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6P2511236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a035534f77b2193f4c30ccc4b2d2019984589d23dcab91ea4212577c21520. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P2511237.