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 0x49c046e300082aa71eb7baf0ba44865e8820c7bb8ab09fd2460cd6dfd830fecf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/661cdd03-8133-457e-ae75-24d15987b7b8.json and https://artists.proofprofile.net/proofs/artist/661cdd03-8133-457e-ae75-24d15987b7b8.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 0xebd1f0217be7d7738edcae49af0d52111113e3a4fbda8bf7f74421f1eec665dc. 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/QZZEC2458303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e8083ba7c81a537580be3809e5c7e8aca9484070519ea9ced7d39903b0a2d5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBRKQ2597192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016bb9582a56989b9e5c690447b53678470e96c9de2c6db704960ed316304548. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWV32567092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc699271ad9a3c3260409deec615fee374ed1b0df2f402e5f4d88e19d35733b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWV32568051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88acbc6f6f5b7e7f02f1c216d25fbc0ac5bc3f43323ab01467aa83fdd2cec6d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:07Z), 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/QZWV32568653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccec17fce82460b933238e46179aedf90d3493c4aa4def327e9589303eef4734. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZWV32567869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3125fcb626415eef6dea076eeb574a1a071bdc08a85af6e27abc613d62d6d7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWV32567962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ff8d843e99301813355582ec84d46fa443c6abef12202aa2e035cd774b6b2. 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/QZWV32568321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724e54204da1c065feee6d70bd8d3b9feeebe793e1e2247ea7c203deec4b98f9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWV32568635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0703893470f9aa6db3507b818fb6b70bf5b75f3813047f2bf957cc6f8f07dae1. 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/QZWV32568712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c6eec49e0bc4617789d9a72c6c9b7854f9445b04d2cc93f81172be4cf1f9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWV32568917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a3def2a2d5fad325d86faf3fd057782a62c918a4ecf9d4b866562fefe9f31d. 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/QZWV32568912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b650980efe9926c99e64ef256b4ac65bf484f188d0a52d5908cb9655f6675e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:03:12Z), 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/QZWV32567016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd1f0217be7d7738edcae49af0d52111113e3a4fbda8bf7f74421f1eec665dc. 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/QZZEC2458303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a10b2c8fb816682f6539eec4b128cb544b075e4a85abc45ab4f72ff1727305. 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/QZZEC2458098.