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 0x58dbe0eec5bea275493f2e0ad75a6f1cd0ba7dabfc1b693f22857a0089d44f19. 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/c135f3be-5420-4391-81c3-2f4676d65933.json and https://artists.proofprofile.net/proofs/artist/c135f3be-5420-4391-81c3-2f4676d65933.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 0x2f7a4655f792e7b795a418d0101d4ebe270e86d5868a65f8e07d6c2b9d7e0324. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:51Z), 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/HRA041165542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb885a7b86beb1d51cd0420400a72d3f71e7767b4a56a2b2857ce862d6639098. 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/HRA040607769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cbe9c26c1d8319718f72639e3b31066a0c11fb22c4ef5986cc1d2987f2e68d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HRA040619226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d080d4c92cf261018362fde7ef38166a7dc1cf4d31e3521b04bb3e6ee1747. 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/HRA048207054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25424ef2df07120dc9931b8244bad937bcf3036bd0ba7e06c748aec0e159197. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:45:01Z), 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/HRA040705667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53f63ba4eb2c3c48e86ac95b0f17d5ce36fe83f567d9a332a625947089013a5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HRA040605670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1021a924caeafaeadb46d3659b10cfbe03ec2b78c79ccc19d1e3829a1b44749. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HRA047507051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f53e9345460f124851110530a4301427123f2fa3b2469f2f1ffe007a02aea. 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/HRA040750819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ba0132a98697541acada5fde65e540f3874d5fa345e94586093e83e3bd931. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:25Z), 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/HRA040756618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9ee2a5bec19e240f371c9249b640341b20595ec8575a38e447be4f899ed5b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:15Z), 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/HRA048920451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad772787e712321934f60ae1e97586df838eb1fbde2aeee4c0aaf0bdaa6941d7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/HRA041582912.