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 0x9be3f9bd79daace558c57d32e1a0fe212e8a4ec50925ae58e1ac57f590589941. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74d6bcd0-61cc-4ab5-98d7-df98194c02d1.json and https://artists.proofprofile.net/proofs/artist/74d6bcd0-61cc-4ab5-98d7-df98194c02d1.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 0x898e82d5525835c729f537343e3e4b1371410e34916526f7a7160c10e9d886a8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3F32479247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4cf5b178829733e0de56814e4d85315a2ce49ad49bbd07a5a7b6bc42a7ce4a. 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/QZZ7N2497785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48ea4ea5332668a570f6c45dd92541ab47b6db9a211cb5202f6683c5ba6ed4. 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/QZZ7R2495397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02dfe5a1154c54eb814595b3e3b351faed7b0818bb0c1600dfed21b244d576f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN82524810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abda7de434531bb9cbb8ed70162c0dfb3c480995e76e07d2ac54342b6a51eab. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ72578551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a5bfbe1cb6e030c0cce77853cf25bcd30554029d8fed4b37d09878ccf98f0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN62515449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaabf0a977e986dc87087e6314b3b675c804b534d7f6cc49ccaf68711287d4a0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:59Z), 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/QZLL92534675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c54f90806226306edc22beb6d36b005050f8056443b01326e03c705751d49a. 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/QZTAU2571353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618cf3d60611f4b2ba11b67b068c7a7a11f419b64491113d1aa7d641244b634. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:37Z), 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/QZHNC2534430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62efab0e1746b2b50b62afd2192da2302bceb16a6f52df0a3def9d7a48493895. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZLL92566157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77492631bd01ad812c0b1bf7d8f09fb03335c14ffd3b7afa45d240814de4d35. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:45Z), 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/QZLL92580775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd460c23ebc94363a98ed2b6c4780b122de27bb14037711a2ef641b9ff5ab9e3c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTBD2526346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1aaad03415a8979d84848bc8dbdc45bbf20b871d1ae43d30289ebd3286ffb6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZWFK2511418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894816a326fb7371d151eb66e039a75275faa9f910746e35771324b3f702374b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFL2518821.