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 0x61313cb82597d0f6588bf96872eb93ec285433c00d1de632e8ca143eeb245a97. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd4083f0-003c-438f-89a3-7277214df1f4.json and https://artists.proofprofile.net/proofs/artist/cd4083f0-003c-438f-89a3-7277214df1f4.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 0x138cea38e991ecea7e4d699d2466f9804209a9c7d39f0dbbe2b493ea9c8f0dd3. 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/QZNJX2561150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2fd961a8f728e17fbad61f79e5cee2bebbbb8f3b2d825ba58525ab9a0d28ba. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:41:07Z), 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/QZNJX2561109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16b32967f506b5fc36b46dc39d671e2d9b3badae115cdedbe9addb097339dc9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJX2561182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de79267ea93e72802feaae93fff9c9cd523f9e3dbf7ac0142bb0b20c6241ef2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJX2561261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ec4677a1b767c7253a7df040f2636541eef5030c3b2336021543b9eed2b85e. 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/QZNJX2561156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6036a9145a83183b8bf5a88f0be49115c18c5618e998e4b2bd777ddd02126f34. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJX2564660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb6daaada3887b3956867d58c997634a423178527b4c54cb20d4f71129e57cd. 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/QZNJX2561106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d871b40813ccee539ac25da6aac8e573ff7ec09af765882f62875bf536c40. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:58:36Z), 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/QZNJX2561211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731f34afdb55ea4c3fce092504a1686e8019d03deaf01c867958721cfe56d7d6. 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/QZNJX2561105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3884b24c51c487cdf957fca709fe18c431854d59151eaa8fe4e80fdaeb907d9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJX2561167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375e37d5ad9f7a003c2d72ed4b9a33f95fdacf4add35e44fa282fe8d9a13bffe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNJX2561159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a58d63d591b8db4e7795fc53c59be0c0b70d2313dc109d397829e3e8594ad6c. 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/QZNJX2561186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b641b2733df1b4359faa10abcdd82bfb32956bea71c28a9c9a45663f2698d0. 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/QZNJX2561355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c56560c191317cc9e4771a66d478a72e56c5ffd8fbb67a826a2599cbe22969. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNJX2561335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d9e32e7f0e55a8b5e1716d51ad3d4cbfb45da36377409547509ebbd296b8cc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJX2561119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f07eb60b10439e246fb61f86c3c00636bc1e7e8fa62d444956932b8e6a13ea8. 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/QZNJX2561164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0a2776d21bf4b16e2e97cf0832398321f96a60538ef713202442dfb79103c0. 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/QZNJX2561789.