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 0xf16747753699b00fadf93c6240d8e2e0d749a0db5730aee79a9601c3759c8899. 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/826fd127-695f-498f-ace1-350c7c90fb34.json and https://artists.proofprofile.net/proofs/artist/826fd127-695f-498f-ace1-350c7c90fb34.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 0xcab16b3affe6881f5a5936201462f23e441d7f55adcbf895615d7a0c57523c90. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZPLR2154156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab16b3affe6881f5a5936201462f23e441d7f55adcbf895615d7a0c57523c90. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:40Z), 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/QZPLR2154156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0ea68bb2732eaa27d9937e2c49f40ef37fbe04ecaf86328f1d461476f4d76. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:28Z), 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/QZNWS2219152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf293ef9bb7f8cd85addb16fde6ea204690dfc2b158a6497824b79bb2ba1b7c82. 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/QZTAT2264830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf293ef9bb7f8cd85addb16fde6ea204690dfc2b158a6497824b79bb2ba1b7c82. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2264830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db0ec822536c45226770e4ef2fd6e60cb2018298be2266567b1119a21397fe. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWZ2305609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d4a4250415e4db276c6f3c5e1026cc022bab4d920e5a4de16168c87aab73cd. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:08:02Z), 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/QZNWZ2305610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6586518fb76db3b875aed2925276e74d820b9b6872095753da031fb9789cf15. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:59Z), 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/QZNWZ2305611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba486ee1bd2a8259cb342e687c26eaecf320fafdc9ffd3720f82df1f5ba0c49. 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/QZNWZ2305612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb21e747720c9a0b12a9210a1ace103654530ad083c2517e0ae03eee4ca52b. 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/QZNWZ2305613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d4a4250415e4db276c6f3c5e1026cc022bab4d920e5a4de16168c87aab73cd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWZ2305610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6586518fb76db3b875aed2925276e74d820b9b6872095753da031fb9789cf15. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:12Z), 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/QZNWZ2305611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba486ee1bd2a8259cb342e687c26eaecf320fafdc9ffd3720f82df1f5ba0c49. 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/QZNWZ2305612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2669f3abd06881e687336f816403c62e21e874941dd3b2f4b5cff3e6d9f5192. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFJ2383645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e4d40f042193973b39657916a603d1e1f379c5049073da7896c7db7cb7824f. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZFYZ2430161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c25827084350c89fa62c6a1fb66d60dbc042281d243df8e3668fb5adc1881a9. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZFZ42498065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c25827084350c89fa62c6a1fb66d60dbc042281d243df8e3668fb5adc1881a9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ42498065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68f14fa66d115d49ef9c7e07ec7f8db67ff2f7450bddb4f5eecdeb1af40496. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:40:49Z), 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/QZES72463682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8a34fe83f91f17766960b1af9b60177aef3992f713f54f2b6aeaf34a3b127. 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/QZWFN2469178.