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 0x6492482616ad63f8fca1b8984e60a11c287a7095101952b2d76e295f107c0f26. 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/98cad0f5-5301-4dd0-97d7-a1b4d0cc6752.json and https://artists.proofprofile.net/proofs/artist/98cad0f5-5301-4dd0-97d7-a1b4d0cc6752.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 0x8a84330d2a5d9db231e24154e2e84313043f6bc269d0a01be8b1300604c57788. 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/QMMZN1701312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f648e7d11a96df165401e50274e541ee6cb67e61fd7a8e6539209ee95e49b4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMMZN1701425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09b13332e84cae0d3d153d9e945da2301f8f2226b0a7f2709ac68a7856b95a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMMZN1701427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215b497fa371e585ecfb1e40304491e2991d72f2f28e11c3867efd3652b3f7f. 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/QMMZN1701430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561eae75ebecf96371ac2f48af77530c4699ff5cef08de604d3d13cb4870982. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMMZN1701431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852c007a957ee656cfa82dca1c66b944e0c091a6d28dbddeda6066dacce5d17a. 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/QMMZN1901726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd766d47cadba1fa7c1a7201df1e3762aee4868ffc12635aa2ef03e7093678. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMMZN1901727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530afaf04cb25e2bf4ea73bc77835e49323c64d4cf6342618f58b72731ad9289. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMMZN1901729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908173bef4ddc054e3ac7c05555d5549dec3315ec55cbc0ade1c3e1dbc88db0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMMZN1901730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd069ab7a6301acd0b0b47336f11471b643971af81fda46f1ba2e00d75d248eae. 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/QMMZN1901733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ddcb8a9a2d6d3f0972cf0ef8932d60b4a7c0b319268fab89428ace82085727. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QMMZN1901734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d278285600317bb81ad3390675d036ae9e5e93443207d1c0cd51e8b17aea341. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QMMZN2002123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bb347df23576d2dfea94021bf3c2f003744785f98eee2b7a263a7e209b9a40. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMMZN2102238.