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 0xd72ac5d5029d8ff792bcd07d167db3d9bd352b84ddb3a7d1013a9fa04da4a33f. 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/0e764ac5-7863-48dd-878a-e591204ec46b.json and https://artists.proofprofile.net/proofs/artist/0e764ac5-7863-48dd-878a-e591204ec46b.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 0x3c0405f287044850a0fbb295be013587d373cc5ef2cb218b92b374ac1c7990e4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:17:49Z), 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/ESA012206892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd06b5239504312790234b6ff661c4021b61171817cc3b1233fe16153fa7618e. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBMA22196629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f88f05578978450f5931240c2b39127e865baa7245edd2ca5983bae5dd2cfa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:00Z), 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/GX3Q92333431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a886706f4a969b80a89bc1cfeaabc018874114684f0f382fbd651b8aad6d883. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:56:39Z), 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/QZXLZ2372220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f01b7c78bd3ab9f5cff843e680a55c637e887209cc51e4b9e7702b13e60a8a. 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/GXD7G2330917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6fe2088a4fb0afb32f4e2d61d2b9c8476e5125215a6c9857e897ec8fbff31a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT1R82400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ba0ea050ee5a37299b23bed0083e34a11db9b41180741ab7c16e1245168d8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SGW502585312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2907d997b60a330441af8c5252bbf5085ad84cbcb167f280d490564c8fa99230. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AEA3A2581889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa311622d49b619f10107afdab33c85f51e3847dd70f2591b79a5802b20ebaa2d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:53:33Z), 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/QT5M22529281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87806db1296e807b56d49ed1b8d661c9f740ed4b8c0795fbf0eadfd3f4b4257. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:00:55Z), 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/QT5M22537668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bc592901a2baa10e8af573c6a013bf25856c89645e546ecc7604fb1b3aec59. 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/QT5M32594260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb21c6e22992c58f023192d25ec8f3b725e7d2a3319ce98ae8d9c27a52103de. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT5M32579112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234d976e6a0cc4d7d6db4a7bc661fbce1c8545f1d0995a912a50e29d001ebc8. 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/QT5M42543523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2256a99cd4fad1955fb7fb10c0f023b2db171ad666465c1182cc8854a0f030c0. 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/QT5M42557053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe6fba3b86bfbd38facbb3c0e656191e2acc6ddd18488f14c8edbfc613c8ca. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT5M42509520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d33413f1d2daf9a54d8dd182746eda25ac27959e8f5df10fdeb028449750b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:57Z), 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/QT5M42568861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8e0a78ed775b23176c77f09a50b290660780a7574bd6dc624687b2663734b5. 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/QT5M42593259.