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 0x7070b2d81a5bdf39ffcff6150cac28e5ba5df4caa4b8a161bc92d838bfe0ed15. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/246156a2-1238-4dc3-8213-962abfd1aead.json and https://artists.proofprofile.net/proofs/artist/246156a2-1238-4dc3-8213-962abfd1aead.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 0x9a9186271e230202f71e27259f441fa96dfca46fc9d9943cfa875c87554cbfc0. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/TCAAX1105231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e12617b3756edf501cc9941a0c1851372b5531897eb3d6de10959782d447974. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAAX1105234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780d2c2db1e3495d31ec373bc61645037fcfb8de5cd2eceb1405ddc9d7c527b. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAAX1105239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2e5756beefa97a066d2f786ce949daed6643665f28977529e862c2d638ca6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAAX1105249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf386867d5aa89af6376eba49826da5b4c00b05fa90b441b45c6d642d7a902ac2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAX1105254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee4acc114c655f423e1468ba419c18eb5407e03a561c7212eb3096938d54644. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAAX1105257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2960ae3db8f3cf19a10765bbd9996ca7215581adcda79aea5b29d8cde153e1e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAX1105259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662e21afd62cf0a607b504a16cb0d98488e6f8c034d588abb743fe7077ac381. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAX1105260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e644c95d434b17e7d9f115cdda459cac94cf82949afaee10739fcd79e13c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAX1105261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed39f9966fc58818a810bfe8feb74d2c439baf93de83509c4f1b87809bc2307. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAAX1105262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f2d886583255a402ad155875a824b396c758de61cf5349d1543c3ffbc5cef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAAX1105265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70f3bc6f475176d9ff11a18a9c1d385d2080d93331fe0d6a9efcca7f1db673f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAX1105266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a5ef5e1bea3515fdd2711f1f437bdef5d8be39303b7352ec210e46595d54cd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAAS1074562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d737ab3ab4360ae0c3b2ef814744af92f92ca9254f2baa94f05cd0b723f586. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAS1074566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc70ac6218e93ebfe556cb5de78dccb1163459dbe0ac92785c11773a5db2ac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAAS1074570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ede178237c9f80afd167759060489d07127301424b73dc6e83161478810d97. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAS1074572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c555220fe7e62eead03d947188ca4e34110c647e38b6ea41c7179c560d2cbf3. 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/TCAAS1074575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810347e295d6beac8798d7f99364604677bad4e7083c3ad96a9c3877dda452b4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAAS1074576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d0d4f8ef1633141ae964afb5e11afa53671321bf9404ea0ce861ffb039e1a. 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/TCAAS1074577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008082bbbad5b8655ebcabb2772188be735ac99a7b93622208baa9ee616cc141. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAS1074579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cbca6cff7833298c1df39a4c7cccc63089ee94a41fe4e16e16ee3f1913e129. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAAS1074580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817517b84de4e89d5b099fc29ca8cd8a0dd6a54a1d029263558091c93086596f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAS1074581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c130d39ba1380ec5b7cefe7c3d3da7694e7b9ee77969eaa1c0f16825ccf8097. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAS1074582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5907782e60686eaf3827464ceb1365f522c09b0112db91828dca30a3384a5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAAS1074583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae52f036e7ebc463589df723ef78b212d96adda01282d94192d2a4e2f8af697. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1506267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfc2a868b36e0c4a9ffdc44b0b8fe11cfe58bd86c55c8e3d2b81db041497fd9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US7VG1506268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b50f1cc22bca9276e304969a60aaa4bea36ad358a85628d30b603c48c4d061. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1506272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ba1219fc1268bfbca71798a6b9b5ce275970103ca032429fe1ad422f47396. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZ5AB1636361.