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 0x0e8ef8be3f72b96324a4c49c1c7c11fb25a0058f9416d15f3e8613d53d4f1869. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/674ce202-2be9-4b6e-8f74-010826b690cf.json and https://artists.proofprofile.net/proofs/artist/674ce202-2be9-4b6e-8f74-010826b690cf.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 0x947e94197c3bad9157cac3a8b0ec0957a2ac48d558bebebdc324600dd88f80d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFG2472376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da419b492b2d9ec2838d9f4ac2581ba4e21a86015b2eb4e624a4fc950827f08. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZWFW2480010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da089dac85727ceb493b6718abbc1c7c7deb8839db6eabee151e5d1d7310fc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFW2480012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f62a8c203ef29fa7f34da5203724d81ca6250a445b2fdd2a40709601bdf1a. 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/BK4BU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947e94197c3bad9157cac3a8b0ec0957a2ac48d558bebebdc324600dd88f80d0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZWFG2472376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07856c93c4a8a7aadab0a92e209c72dd16c363b5f08e7214d49a29c2ce9ff1d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42215437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88772330d173fd3e787a755a46b87515ba025239b4427d839f0d1c3b03d00f9. 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/USA2P1925692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b90f048fb79b731744ecd5cb5aa58b13471d666ac15cda7fbd30618a23ea78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2377547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb484216c0066fe88121b3434e9a0cbf4a2a2fc5b089cc3dfb57594394f00a72d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2377548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad41bbbc04d2b1bf2e87a86cdcfa3527cc2c0f6391a374770bd8846e97c2c1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2377553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d25a9dc558b4265ae2fc81084498a839f36b89e8da03c0abb84c53c889b5b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91827587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5855d47573904d049a90b2dfeb2f5321cfaa346c37e78fc3596d3c96e3e99f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91827590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96771810bcce8553a6d6366ddc7a88599a1081b5e6d8e7e9414520471edfa34. 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/USHM91827593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a7ed8d7054ca7726422b61682f8b0dc83b3bf8f2343795875e770a9ec4b24f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM91827594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7003278a14cb1cd097b266886bee8157849a85ff15f1c1e56a0c41ce6dc13d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6P2202354.