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 0xc0255e61a5503165bbfe7ddf4865dfc2f02c05cf982f3dc566ea5d79d146ba1c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e54d13f9-94ea-442a-9a2b-0245a2662de7.json and https://artists.proofprofile.net/proofs/artist/e54d13f9-94ea-442a-9a2b-0245a2662de7.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 0x56b3374cca508c29de7525e948de600692c3b23fc100f40a7bf9ec58758312fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHZ31912151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb0766339e91d9a58a14dbc5fb752839b2e604cd5cf71ce25f7631be267888. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BC8VT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a97f9f3340e638918d0c2fd485196cc02ad4aa99ab7f54f1a7d770bde6a1ad. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:09Z), 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/BC8VT2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a17b72314698879c6c276356b9f129464ff02bd145f8ea904619ecd1b64cf56. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BC8VT2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464a34c778a509fd34231dbe91f9a92668624bd19f4dc0acecbd718ec28c7d7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:07:51Z), 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/BC8VT2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe10d3b9d4a76ffe8578d2b7b562b81be39a87c3228305ae6c1527dd6b7a343. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BC8VT2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d8928d96ecac358b96411658c1cda005e8367f0fa03e3a15a9e66259af9758. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:45Z), 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/BC8VT2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60145dbe0671f52a663c6451f1cd56ffedb2349a121a4aed63bba64144ed75f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BC8VT2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25a9504abf91c0a23171b3a12e443a30bebfeafdf6f8856821365d649fd7ea8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:58Z), 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/BC8VT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf232c8b5f341fdbd9a45c25f554f406d05101ad632504ad7ebae30ab061b2509. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BC8VT2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292fc3226e8bc055d3824082fafd211309286001cda26095a08df0888ce4601e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BC8VT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87870a6322b236e6888cbc4f417a49f8cae36bce9ca68597a42f50f1fbb437a1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:40Z), 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/BC8VT2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd14ad0a32a4585c82fc0f0cebe9f893929df8b0b0fcc5568430299f5b78ba8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BC8VT2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8015dcb1b3db8bbf1bbdd75e26f9a7dbd8623eb89c2027f57d5100682dd06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BC8VT2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ed54742479c262b5b236da53ee7da2e83ceeabf73d3de0505952821e0aaf0. 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/BC8VT2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6f30e7fac9ac0f06a4be900bd3b1aed9fbd39fce8bc6063c03ba4519d166a9. 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/BC8VT2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9c565920e05106fde4f8d7d9981f805ff754155410eba837c2219933418c2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BC8VT2500006.