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 0x0a348ccf73f32c903dced151ad7e824d586649c2328e2e30fc4c45b3ea87394f. 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/1a1d82cd-6b27-481e-be65-2b0c222b65d2.json and https://artists.proofprofile.net/proofs/artist/1a1d82cd-6b27-481e-be65-2b0c222b65d2.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 0x202ee5e2a43fa1c12ad6aac83df198dc3e42de8dcb31b2dc9012086139571fea. 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/QM3DF2177744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c1d043f664aa1153abef1373bc27ad7e2bb1bbed119c0600e29f8e384aafe. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QM3DF2193567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe3c904367661f358d08cafdc14ab205ce6d28f93aed46d88481acd904acedf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM3DF2197216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c293b250b0d18f4e813fc9b725c83076396eb3de84cc779b219cd892bb647e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2200822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68b91934b7114a86b7bcbedda9befb83127708da6c385100e8863f5f7b641ec. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:22Z), 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/US3DF2224730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b2800e860af394a74898b855b54ecf0cf18346387c237802daef2fc88f492c. 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/US3DF2235240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc1c039e55c7d0c60fde07241781a505c74dc98d63e3abc30193775bfc1ca5. 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/QM3DF2235913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f62ba8ff83368afa2c0721c83333997a4348eed9a2d3b89277e37125780dda. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:16Z), 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/QM3DF2210512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca14ef7b3cadd9733e9d6679e9e54bdf0d9dde0fbfd375cf51e05fea9d1e844f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USANG2270053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b8c61df0ddcb3f2d9a9b2b768efdfb31f9e4c81452c843717e4d642ead9c3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMANG2207494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c7b89ad0c401f243d4e1ab002e3c8483cd7742215edef5e31e917c43c09344. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM3DF2203695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac0118dece0be40ba80e754511dd2a3fe12003a1b053282354daea88abe740. 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/QZNJY2477234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd82e97d42207f535397e4bc7b031e19555faa52bd24e25d6d93f161c0799f42. 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/QMANG2221212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcadcccbf2ebb6c43ade0668250f5cc64d8622f40876d193fde9c96a39d0ade. 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/QMANG2294198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce785a7cd8d742769a545a673abd7197a827bfabf1a5f53a222c98b2984b1a1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMANG2206793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135de6846d32eb57c36165e8c7f095260c539ace2057e0b5e7e3bb8b8f9bd84e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:31Z), 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/ARL2P2300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510747d488c6f8bf7ffcc1faa980d5495d72bdd3831af50164a2e21e0db36c63. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTPX2418448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dccb235d011ead9546d6144e0d98c4f7b9a251782e0f0e174aef55d0dc12f5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTVM2522512.