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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f878a2cf550c8197fadb1cf6632d36ffd742c4b875ab097cdc43d112d02dde7. 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/d85b4bb1-0b9c-4331-ac7e-43b9fdf433b5.json and https://artists.proofprofile.net/proofs/artist/d85b4bb1-0b9c-4331-ac7e-43b9fdf433b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Digital Time Traveler, Episodes from U-Town
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0029cea080e9efe2e87384b6f6b70769661d5141ffe62ebbb8d8abe646c794. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYX2045476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a0d49691cbb1cbf3ea9e3d3e0367767f09fd3398a790fafb04d79207920d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYX2045483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb259bc634dedfa4aa7f38f7b928d7e88a8c01d92dd05ca55a885da7c411200. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6J2005355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a43e5259331f5c41fbd506e878f8d0f03902033f985e21fd97815794a219b1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZDA62120790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98319a993cc5e010f6478348618951e152846d661f3cef1847c03f9888ac1013. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:07Z), 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/QZES62202336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634e4b77c901d30b75f7eff5d8cabcacd23bb945998610d32c2b509985b289e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2244362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12962377dc23da9b344e937a783e5d0ba5a77c825e6648f2a64d81c06d28af49. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZTAY2260387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79976b994200aa3801e21523cfcfef46e52bbb1a9b2c6707f24cd9aa8518b87. 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/QZTAY2260389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dcf9af502731924ca03fc0a7a3ee5836dc9b12374d5db1e81f208daead6831. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAY2260390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb5e06d9b1380fbbe3a2c27573fba10841ed4bf5ba5b4f39b19e8cdb9252b0. 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/QZMER2342543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eaf33c5b41fd26c9e4503f9ea3937f9c62befb4f155e2355352a00d3d35812. 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/QZK6K2416349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f7a2a4533ba4fa039bff8713deb76ca673ae3efc0e4e18209260653908860. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6K2416350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e7c33ea31a98064f578ce4d0dda218e9df0e6ece049a7c9e3cd9eaa252f12d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6K2416351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7635c32b099e4d3d12d5c6c4cfdcaa2ba27868dab2dcfc21addef9b55d63581. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFR2369875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c79f89466d32652a19a9934b38b1cf0511e837262785cfc9a9f083bdbf090. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES82420103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd47ee094af96ad26bd84a00ec64f085f39c2f71f43291396299da1ff7717f3. 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/QZWFR2369874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8668b0a4faf24f855c05042bccf40494dc7bdf4142a812c03dc6c9ff0cd9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2134398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b45518653a9b61cc8c28ec29f35d8c53b3a980fe7b7ec02741d228c2146c52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2134403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd9c3d157cd8cf6d55f650eedeada05e84605af6d2e5c42377c2340387b4f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR642500487.