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 0x35e0e747be117707a074d4ac85c0fd7863fcc2e0c13e3329093d76da6884ee89. 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/6bcb76e8-f65c-47f0-87ef-7bc77904a51f.json and https://artists.proofprofile.net/proofs/artist/6bcb76e8-f65c-47f0-87ef-7bc77904a51f.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 0x7e1ad68c99ceead9ae66dbd688145e95a952519a76a829a1f5872edc6d4d2d27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ62223664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f266e3056180edb09f7464aa6b7d72e0eaf53cb2fdc68fe4d8fd12e6f9dd868. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJV2201986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b9bbd3ccd7294343555da5b0d1f3f87980296d7d833df5f3728ec1569d349f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:59:07Z), 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/QZNJV2201988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad211ae778f12762918fce98e89596689f95e9ea7fc248aceaa779b44a7cac04. 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/QZNJX2273323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50f7c72dffff69aa072cb5c6bfdc6fb0d19872ca92afa0869ee8540812cbf2. 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/QZNJX2273324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376bdc0e7c0f5e8dfc0f776b714a6b2a335b92e29117dd626dd3435fac90a91a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJZ2226050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b08aed3ff73f072e93f0538b988d59deb42d3f377320f4cd9391a8b0f6a14e8. 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/QZNJZ2226206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991334b73900c40077e9aa16175b5e0c35cbb0dfb1cea0a865903896ba21e4a5. 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/QZTVM2239614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3ca1d5778690dc48b1e8cea901b5598023526443d987961bc2ebeb715f3be3. 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/QZW9K2274816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8d82d4dbdb1d1b454a9a70c962796b6579a1d370fc7ca9a69842d88d56c34. 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/QZW9K2274820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392fabb4fae2dc1786a171e962439c2bab9a82f8af3a8b6b300337539316f2e1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZW9M2252094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa994d017a645f908a52443ed7809e96b00173c993dcbf8188f352cc94f55bf. 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/QZW9N2218784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a54a5287fa98c7144a148156c6125b5664a74d1686146c36e20b858e2f3b470. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGLM2348207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833af2e53db65f1b5bd7ee280e45590f4b96b10a20bbf51cf38e5a23639eb16. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:13Z), 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/QZGLM2348189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a5f5da783eb31cd697b46c631220b921f432348f0c4c678e862e95e87b2df5. 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/QZGLM2348175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51878edf972a5920ecfdd320a9e7fa87919336689418520597bb842c14bb65e5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMZ92303770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e3497feaa67d8492c4a5d8329506cdc08f09d0302da830c6be731dff2e683. 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/QZNJV2305110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe377c847c23bab9840879c6ac431ace3f0fa643a12b0242a754b47931f9dae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2383000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee38c1bfd3c721dc4112fc229177d425db859ca81f4aa12ad69893ee1659e25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJW2326187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65b1b33c6f02a027c1ff819102b3d88ac12765d2f948972533e4c43b711ba7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNJW2386140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce1163c4036280168e6b0bcd6240b41e1d2116a17c527ca6bfd43592535975b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJX2383425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cc3d69a938924f8d2d11cd23f1abbedd8606291169b36796709cc0f22bc8fc. 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/QZNJY2348581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa4039454a2e62572b6f7497eabaab52ded695e261bf5ced7b0864ba6ba44f. 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/QZGLM2443924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8a7ad0c64341c7ce1a90bb596c074b6832a5c27eeef63df252684ca80a1b5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:41Z), 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/QZTPX2465883.