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 0xefa00ce6db402f58e3b4e9abc41be9fbf39b4b1565e93bd76500d54e538e7091. 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/ac4d5f0c-e547-4a6b-84bb-6e8fad0a74e5.json and https://artists.proofprofile.net/proofs/artist/ac4d5f0c-e547-4a6b-84bb-6e8fad0a74e5.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 0x541407f8f743a48102ca82973f47d9fe072a81c07d346a89f7f8a3697a5e1d20. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLG930700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c809af4e6ee6b5f8fb52a5e5aadb921ef768104d7cb91f486aa082b518675a1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLG340600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5955792bdbd471854a72572403cdbea09ad0affbd086fbbae7594fe2567c0b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLG340500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb262418d06a9e338ced2901c1ea3e358f8623b59263d6dde0120205466b96069. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLG340600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaab77abb535d2bd75437978ceadde20290e2aaad821706077422b472b705ed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:15:56Z), 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/NLG931200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5c4365e47ea87934bcae407f32289590f93293d3b3e60eac3517d9354a6c29. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:55:46Z), 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/NLG931500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d15e73dba3ab6521f13ca409459af3236fcfdff5254d9aa2d82b9dd4dbf8bc. 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/NLG931200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd528297b28582087a6c1ef03a2aca7385108454c74198913d34a9cd90b6a1c38. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLG931800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11433856090967dedcad33edd5b92652f5d8a971c3d35a8e2c92aea82199645c. 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/NLG340000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfaef42eb5dae8980c7ee41feeebb3b2e11d8cd3204e993282385855b4e2a14. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NLG340600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ac3c754b825b14c014bbe979d5149137d7c02e359fce06803bed8d0e7ac018. 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/NLG932500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7c575266e8186718ef87dce0c22733f87ad9fbd55b79dec2e98e8593ddde9e. 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/NLG932500072.