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 0x3ea69b230a5710d7e7d8efe8ef721e69f3cc5633c6503d45fb1aabe347a780b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/626e513a-2484-44bf-9022-fd031c4cc0d0.json and https://artists.proofprofile.net/proofs/artist/626e513a-2484-44bf-9022-fd031c4cc0d0.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 0xcb04712ff2ed48c7e112f75bf3060fc42a47b315cf0f8115f65a8b0878841dd9. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NL1AP1903341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0703f69e341a2d65fca50800b9d5609fd253e835241b2a3ac4bfd347a5a86d74. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE6A61900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614c4829f43adf3fb613f9142864e16857b148684752902a379437fa2b645cd. 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/NL1AP1903342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c4f2b82f53c7b32d31d62e4a0b0339d9a108db4a2aaf7ec5e921538259876f. 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/SE6A61900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c9eff51b6173c1e4c3f0170b4286bdb86ab271e391baee1f1f46f15393959. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE6A61900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d0c668b23a89675e4e50a3df253b978851de63e6a90ca2c0e73b1b1eb3b42. 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/SE6A61900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c5bc8633fd0be8caad054e1435c4dea5da973abe481822b6e87739b6ae4799. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NL1AP2015399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d630f05cdb96206120efa754d8585b3756931cf80c598df79e31c1c96b639. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/NL1AP2015402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9d6022a68887f7a06f234cbb9a0c7b0b335b802b2a718859662a31d71cfae. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:42:34Z), 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/NL1AP2015405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62af39a14b714d225f3cf58334dd45613dc8d16870371781ef154eedc1ab53a8. 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/NL1AP2015407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc8c8de2474da29f73c662ef7f30acd1dc378730175a422f5261b969ac01d6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:31Z), 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/NL1AP2015408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c467ccccf005fda7caf6da0839921f25083c235fc1176dde03229b70b51a69e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:38Z), 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/QZK6J2248490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c0a4a30b838a311fa6576de8ccb3a7e5adc08b3b8dd6f91bc9d5eceba6e24. 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/QZK6J2248491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972586c42642701e6e144c44ddfa0e25ee57912a87e5c25b32cd691be02e349. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2248495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2423f29d0af3df482c8d43bf7bcc234073ec42156580fe958d0df7b5f6a90a. 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/QZK6J2248499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3789717f8867df02e3fd9d2411880f05c32d2b7e4638ac3ff3e5ae28bdc272. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6P2428725.