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 0x27fdb6408c19743009e15a8d1d926cbea9d99b0b52f308dc0c0ea22cec170bc8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93b46fb7-bec0-4cfd-a5cd-d539ad241a65.json and https://artists.proofprofile.net/proofs/artist/93b46fb7-bec0-4cfd-a5cd-d539ad241a65.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 0xabb3c0bf22725f75b48de19e5eaf30426697531643b9f38e28b5c0992007d427. 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/USL4R2578567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e20868a573ab97ba1b8939b2b0772c0539b88863df812c6b8ee7c0bcba091f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USL4R2578568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf9eed52b2ea21b13e9aa2b0bba9511706630ed900d423bd34cb756f15b9a90. 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/USL4R2578570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b0f143f1f3e0043bbe1c7e9f7ea7a16635345720782ee4629da645c76a862c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USL4R2578572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2c19b7686226365ff375691d72ee3e0523a4321c559bc884d33ed3c3a9dab. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:33:44Z), 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/USL4R2578573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a764aa9e530a9eee3964af084f8c50ff3c95d3b9410baa5c634e6661c16ede3. 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/QZDQH2387031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e42108d79fca9af333fd31f5ac58802cdfbe46d7381cf67a059557ea1bcbb4. 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/QZDQH2421528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b5bcf20e43ea84c349d8fe6ca486a98aec3f85db9ab5169527b6ed87ab881. 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/QZDQH2423325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e42108d79fca9af333fd31f5ac58802cdfbe46d7381cf67a059557ea1bcbb4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDQH2421528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90b874d4fba8dd75ae43649f677f095b2ab443a15548a6e05b201b1f2aab663. 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/QZDQH2427557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3535e0d67fd15f328610786939574fa8f2b81ffef4b2879831e8fef31875493. 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/DGA082379044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac1c4092d8f8bf1cb556bf3aa3a5bcaae27af2b953c865a41e026c8fb9c2f5c. 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/DGA072337694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6508d5f60ec1fec9b9e2534864c4e0d1b8301d6177d867eaa2787a003c50c. 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/QZDQH2412690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c0bd0ac18eb70cdfce9eef7912632ac672ffaebfb413ef45c908a9c37a625d. 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/QZDQH2412689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b1287f13b758a91f62de2c1e344d3af3dd981e28307da8f0fabc68b39eea1. 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/QZDQH2412691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8702c5a88228cee28b68a59dc4c77dd6aeb6f2a0d11d86bdd645338f8c11a1d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDQH2410648.