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 0x83a2d01c8fd6b30a3026f2c4801d79fd2cfb94c9c22a141fd893395cfd431e0b. 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/b4006377-8655-4dec-8ab1-2a4606352164.json and https://artists.proofprofile.net/proofs/artist/b4006377-8655-4dec-8ab1-2a4606352164.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 0x99aab172699ad0a34ade22f9fa9986d6bb4706cf90988ef87acc4834c29f3470. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZSTE2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3acd1a6e2e2faebaefad88bb6627d349c29e3d15867c336127a0450d7f596f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZSTE2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7b5d5e3ab9434b5ff7a56403654e083e109edfb4ead2bb7065ebe89efa784. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZJ842401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bc7fa82b90041b24bd6a714bb8c3e154af46577293d632870bd5201135b73. 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/QZJ842401848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0147294f638fad83d61c7a36b4c80e20b384eff393a388329a645b1f43602ce. 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/QZJ842402639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a0132558c4011254ac0ae0a37d2b15d160ab2f291e15039c6ba5cd6281286. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZJ842402640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bc7fa82b90041b24bd6a714bb8c3e154af46577293d632870bd5201135b73. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZJ842401848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69a4f2c16da6bce7c356b85c2e3ee4aef1eda95f8a0d5b738e416b548c7ed28. 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/QZJ842402641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa91b9cf57c158cc94ec00c0470e75f53453288d2ae971ccbb0d19e79488443f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZJ842402642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda393ca38db493e8fd65d57b948816534d30bcb33073147a52b31bc391d154. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZJ842402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1906c24f55f8fd1ba053d78b87203f5742a0127e568ca316fac9cf92a31a3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZJ842402638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf100b2abef8fe9dc38820e0c5da209fced3829f52f6b264b2a91df34a19dc353. 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/QZMEP2587460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a8d3c10af2057d39d31193a7b79af7f58ed6f9ef5de2e2d84465d689e9885. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZWFR2528181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ad199c7244333e52491979b721e7d36b7ab9bc8451ea05a7acb49219daf8c. 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/QZZ7U2562061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46a9495eda32f03012b89fe75da7acd08ffe9f74d580b61f8cd4d07899b4404. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUYG1546832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086eb33beb7499689583ef3025dc3c376221613ea32151a284c0797061960ae. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFU2442702.