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 0x74e21a0aedaf46358d9d60c3d3206cb3697d5143cd7cac6b3ee49d1876c71757. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b692865-b0c2-42d2-b08b-e9ee2deb37a4.json and https://artists.proofprofile.net/proofs/artist/7b692865-b0c2-42d2-b08b-e9ee2deb37a4.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 0x974cb39978f81917971a2b2dd11ddfd32514985dd1a4d8e3f54a33bd35dd27a2. 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/ITC940900573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0559b9c4f3d8af7389b331736dc351d2e953649a29d9d2800e05683cbd0bf1. 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/ITC940901208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af9195e203339b50d8014c5325722a711f60452a360ac761be2b114100ce4e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ITC941100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894df860c814fb65b1023a5578087efa57b2abdf0885a6d6f544f9fa8d71047f. 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/ITC941201299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148de5b075b89afdbe94a1a9e1950d1f10a0524816c204f6f43e65ebefd6f514. 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/ITC941201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348aeb61b8f418bafd11d03ebf8c3221fdc8b46ae7dfa0562e2457d973e47ca. 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/ITC941201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c64c5a2283b907f94fdc7ee23825d16bc2acf45213aeab0567c7bd408d6cdb. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/ITC941200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6f67f1db2f508eff1c0ecd5d46353faac8a25701b54d4d183d46c807755776. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ITC941200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6f021c316378c296ab7cb8b42a1adb69725d063cbe6fd1945efa11600ab74. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:12Z), 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/ITB841700463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dff2d40e8e7fc6dd51648695155e3c5b1eb3ed2351864d76833c9feddd4a39. 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/ITB841700466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a85f3ee1e3d15b111fe968a3ee31ecfc6085ca26f10f4f74456b6a20a413e3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:16Z), 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/ITB841700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fcb565bf034ab390542a8900d3c918a8f444b222b09e58860754b4fbee5e14. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:38:03Z), 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/ITB842000358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc61b7a3887303904147a9e40e27d578f75b46a1cd4dea487430bd301715a50. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITC941001269.