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 0xc900e67573cf6e15e2b71d390747af5c68dd77adb229fd7dc48c131fe352d653. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254a60e4-a902-46a3-bc57-2921bfd19258.json and https://artists.proofprofile.net/proofs/artist/254a60e4-a902-46a3-bc57-2921bfd19258.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 0x2a6de02d66bc13ce871549a8581f2ede70195bfb894dfc0a712d51a67d8e3d32. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEN2168482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b5e1f868da82c233c5c2d7b4cd247f3a08bd99117496e210608e22e2ff7ade. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZMEN2168483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38cdf6067b09cf1d11d8e0774c73b4ae646344bad45e15e65742643b014830. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEN2168484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ceff5fba8ec2101391c58591477ae13ed821efce56f1eb69b44e4beaa99e5b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEN2168485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302813dc776ffb025979c19402109e7dca6d297c139a27fd2a4a6369175ac88d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEN2168486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb308c333fed6cc9178721b83c5c47166088013fd86dfcf65b649cc3f92ccba6. 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/QZMEN2168487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1253afd3fd2d2a97abeb2ec5f8388acb6c16d4b66cc2c9f0028e4c05d5c98. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZMEN2168488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df954953705c6f1a771e66c8aa0b019f7965defe910cd91ce5e0076fdbcfb7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:02Z), 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/QZMEN2168490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc4828edcf55f3462bb671603f7d020f73ebfdde527d92da458ec4e60b22a9c. 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/QZMEN2168491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe130eb3cd5dac648e375c785fcdbdfe71865965d23db8a0f2df07aa0f05299f4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEN2168492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fddf99dcc716254923396a569c9d40d6cc185bc74eb0fbc63a6ae5b80cdacd. 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/QZMEN2168495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7037c34db015d3bfe9a41b996b97ee4dd8817f489732762881de3743bff49136. 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/QZMEN2168496.