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 0xf882070947cf8c23ca5c285c6a5f3087b02dee918c4636af923ff6af2bed76ce. 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/e93d3e1e-51cb-404b-94f9-d54d80dfb982.json and https://artists.proofprofile.net/proofs/artist/e93d3e1e-51cb-404b-94f9-d54d80dfb982.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 0x64960c0efacac4073ddcc56ff775fe00f1e5d7748661540a129d9ce027e10da3. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/USMRG1657704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b37016c40c6823718395833a8b3df52658933dd4d6b4ecf053ff5a9b57e481. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/USMRG1657706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4843a954dd4ded89d8489763c24dcc48101fc4024d7bc85e68055721f180a5. 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/USMRG1757801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba4dd06f3eb8e2b3f64a1f101a5230491a51d92371f545ab0710dcb1c840fc8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USMRG1757803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964baa40fa383a4bb0fec9e2f916a78500fc96af8f7ae0d849012c5ea5ce3fd. 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/USMRG1757809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340fe75ca75d5503429a0cfdf3d9d86b57f4b45b15ea0e4d9ede0c26fd44e45. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMRG1963804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4818d697d9f0583a5cff08a68a49c8dedcf06520489eaa585d7fbd0230c740d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USMRG1963808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c693193a5415998a0d1cd3e3806b2d1a9767efc04dfb717366fecb452f5021. 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/USMRG1963809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb106ba386aa86ba6294b2561d7bdfed21cb4116f6484a0bd1b32ed73c0345c. 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/USMRG1963812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302196f9e666b3fd67e5e0832ab92233bf1c5174d5d29ad2e4275d18c1c79979. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USMRG1963813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674f94524f4fdb0949d04e1b43486232acb92db24e6d0c0a43d38f6ee6545b69. 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/USMRG2072101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7002a2cab51461c82e2aab938556a7c88489eeceb26f2bc726002a15774d653. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:34:41Z), 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/USMRG2072102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a25a15472c16b97892350ef6070b9aed299bc7a8e1e561b6c1968e62f54f86. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:42:44Z), 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/USMRG2072104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7002a2cab51461c82e2aab938556a7c88489eeceb26f2bc726002a15774d653. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USMRG2072102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc35b3fa01c17fc53a0d299acd0d92f61bb04bb1a410d0cd142cda9a4973e89. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMRG2072105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af70a8e089495e8a53add525944a249e588658d44922bd9b2de374b120f45f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USMRG2072109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787cb11afcd8eaf6c473c8738789bffc989682db7b7941448415034a3869dce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMRG2282201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed974617183824e20d21ed53355050c09cf652472062aa3baf039766bd6422b. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USMRG2282203.