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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8296c5f3c18e5a9ed92e596a10d1384923545a6fdc26f8f33197ff708a0603. 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/8d8484b9-c136-4092-888e-e60fc8987473.json and https://artists.proofprofile.net/proofs/artist/8d8484b9-c136-4092-888e-e60fc8987473.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576936b6dfb15b78a2dd8db2c48751924df0139ede11d8547a8ba86b858a8c46. 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/FRX762464304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e662b213008086d13e2585fcf7fcda103d0f541fe5024d78ae7148fe6bb3d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX762464308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0827d0f12df6c2e3a98e3bb528121ae87157e1c1e8c4cb7c985f542670dbfc3b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRX762464312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cffa0a391bf654e0609f0fab2d27a30e7da0f32cee7b3fc6e3f9554bc5e979d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SMRUS0058667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13340cb47ccb26931235a34e827f4beb0a16baf3dbfdbcba16a697e231a2b895. 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/SMRUS0058669.
Chronicles of the District. Compilation 2010-2017, Ч. I (Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb2c246ed0985ab6e27209ea39edfd68dacc07c2d46ffcbf06fa385127aa5a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:05Z), 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/SMRUS0058652.
Chronicles of the District. Compilation 2010-2017, Pt. I (Special Edition)
Chronicles of the District. Compilation 2010-2017, Ч. II (Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0210a196fcc2fc0a88bb253dab37ddb1e65a2616090041121d4e4218e07e2b5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SMRUS0058659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12df66512dbad17ac70f6d187b77f583d9bf609656c54f8fce19084c048abf2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SMRUS0058660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1505d847a6cfe97a1a2c1bf64694860c8a22b86816c6b7fba83b5773d3823875. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:06:01Z), 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/SMRUS0058663.
Chronicles of the District. Compilation 2010-2017, Pt. II (Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb7f078ed641e7e805afd848b4058c24a202ed9c473054e4711571d254f4739. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/SMRUS0058850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0191b562b977da03251cfe222a8505b1448d06b48d4973a922269ef954dbdfc. 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/SMRUS0058851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a294828937e4095931347209b3ae0f544fe7b6375fbaa7905aabadb59343453. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SMRUS0058852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f80973951cab6759efee903d678ae1476508a68d05ffdf1258175cad764518. 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/SMRUS0058853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b836bb6f3f39c1f0978f3860b4ad4d2a1d7ed608a4f9013c03adbeae6820b9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:23Z), 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/FR96X1937237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fcc4fd89620d1f254a3614dbcdb0044043fad6f52f987ec947079dca914f75. 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/FR96X1937239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99faa9a32caead60885317309ae78f7026a4adfdaab6826fea19b96a087888f7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FR96X1937241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4df3725fb975e03051e8121de3b7e44d055f4e2adcd2ffeb460f6aaf61b752. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:07Z), 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/FR96X1937246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57348b12dd1d7601001b0ccd807b187b20fba8037cbd46cc4894ee5bbf3354fd. 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/FR96X1937249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbaddd7ae91c1ddb853a0509d0ca1fdffa45f75a93d07782c1a7aa73edde6f8. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/FR96X1988496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f652d8472b3c8240ab7140b54688f2a9bc234910bb371394b30de5645afa652. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR96X1988499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a9d807e8f941ea22ff272bc3fc0d07465a8937179435c630bc017c45c62d7. 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/FR96X1988503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5ccddb170b5c0f92dedebeba8066684f96a2453e78afa642a86aa917ccb63. 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/FRX201969537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676aa6d2a9f4a7b8f5f4d41f59b52cfce59d0e8ea5ddcb9e064a8526ad480092. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX201969541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5952c0fd3f74b9b23567700cb1eb648e5f4d010069171ead92a15d7d52c8c6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX201969545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f05195758332262d3bac8e5d381114414c93ba729f1b203c08773efd7f52fbf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX201969547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1685ae412486b3cf94100c3c057ae414445e1267d54d3cfc31f15e2f16836. 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/FRX201969549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a4ef1c19bc19c2618eea6492b02fb09d029eff7e33898766a50b903961681. 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/FRX281973338.