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 0x49c5f06237e401f5341bdaf1e6f8a1efd0869bcdf1f6d796a894872e97a0e369. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/647da061-34b5-4d5c-ad3d-030ce97a43a5.json and https://artists.proofprofile.net/proofs/artist/647da061-34b5-4d5c-ad3d-030ce97a43a5.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 0xae8a963b8b1e482a6c12e177bff4601b2a1fd21408122263354c52a8330b99b5. 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/QZFYZ2215545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd369a91b0abbbebd34d95993d2c67ac4d33c0048bbe1a789e19be037d560a5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA52280907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f52813758251d323c72c62af882ade8dcca1c896a4e82a953fef6c3fc7cf8d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:16Z), 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/QZES52270832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f928b2bdd9819ad288bf3f528edf0c8486a75f5a430ce9c3c833b8386ffc419. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNC2273552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b310a24f489ba95bfec11fc88faa1f12a8e0698e8fed2cff2a0562f0334fc5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWS2276532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b093d2eb211f18c71af85ed9d851068d34630acb52b5eed4aec8d39279a820. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB62258466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa627376bf280a9561ae912243c80b084453bd851514c2253f3730238a2fa656. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ22399967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53828c09bde6db003e0dcedc28a06a22218461a27c1551a0e1a692524ed77d3b. 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/QZHNB2351427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2069237ad8caf637738a397696eebc3228f21535246c64b47e2099753e5f2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWT2365717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2493ff2918fe71fcb43e42a770bde91309e9fcc804e305ada5f9d198040b0f. 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/QZTAZ2387675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a69826af2c17ea20cfe67add815b7c5e15478bd37fd770540168466373f0e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFE2354631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591bdc27df9dacaac4f81566101139f07239e18e8585f7c54652521426f0b819. 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/QZWFE2354605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0ebfa51bfedcdd770f9a2ec20c8a78a0040639eca6055643cbf4a0b12fc380. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:09Z), 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/QZDA72465164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e971959b513c42c03ad3238b2d952b7764a26c7ea146440cd060a0fd214ac. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDA72464843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4329cfba9795fdb2bb014439cbae673a6f02c2e045b068e7bd0d3e966b91d29. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:44Z), 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/QZNWV2436986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4876dca53329922873b71f66e3a033f40d14c5521fb89efdd90650d95bf9fb6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB32412117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41577d4c08a11b9c3f5fbcc5c77f9f34ed53e122e2500c3fc98c39605718bdcf. 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/QZWFK2583639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba0cc42fcb93d2b2d3e6b994016d7149dd22e9e475b8b101e9b4b86ba3fe69. 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/QZWFU2582527.