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 0x2ec172ee3b5ab31d74f23e8d583d7c84f429e90306f85a9c7d8cbf6c52df53dc. 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/b64297e9-6094-4060-8c0e-a13b0053b84d.json and https://artists.proofprofile.net/proofs/artist/b64297e9-6094-4060-8c0e-a13b0053b84d.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 0x50d32730e10b55102aa93d6b0d3357e582392ed0145a5a336953b2ee50d01a52. 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/DEW872006475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa34deb642b1750faa32b84d74828c243e840373be3f34bb05a4f33585eb4ae. 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/PL83A2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5856677d23b27c1832bfa0867655410567ff0c5f1fb9771afa1f126781c1d7ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1923703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a63d7b1ae0f2b9c6778337d55afd98af1e9ed9d6065769a39a1084e3f5064a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1851762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858ec3f7b2762b57539a355b0ab9d9a05056abc8d5fc6c552ab2e512c34eb62. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBKQU1960593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8a421a11709dd4303fbd314e68acf45dbe859920c2d62c4b54a300196bddad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2318852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaa5852bb8451e8e78732183cf56faffde8135fed4315eb2c3962be408b87bd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ETR212100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14d37075ffb806e7b00057f1e051e0546e534d12ae9d59669ba7e69789a65f. 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/GBLV62004044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a49f7ac65cf6bbb9aafeb9ef4713d57f8b2b3c552de101a037e017e2209068. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBKQU2096145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a02b979cce48e36179e3edc90c585bec1290fe5012e1acd4113c158872c2d9. 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/GBKQU2046727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe433d37dfb8d020b3bc024acbcbfff8d9343476f09a5fa095ee936d04d221d5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2027874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad94591187abc79f1749c67a4568bfabed47e5d820c7c6584b4cbd981e94b45. 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/GBKQU2008891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc29a55e56cd26c8211f8d33948454796fab1401c60230cb0b0bea6ed88a177. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1804470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b3eb1f21dcc95ae174c7d2940644ba34ed0c704a7160a9b465eb718929476. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU1804471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400a38931c1c11233789456eaddffd1bb5258624b387c003a80fd44db99e9f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1784381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2692be42441b14d13194a7f624778e63f7d575b5667d07abc1f3c1dac6377c. 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/GBKQU1770522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12807b1f2609c28bf0644f5b4e14c3c3536622a20beaa527cc710f08138cb863. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1751614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83810d4d1fb4d671dc32b4fed6791554fe1d2cd81ebb7b2d493611aa342f7166. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1747989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d7efeaba7c828e6f5780073a516fd91067bfbad290e7078ad964f3a0152b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1748877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915bea4bf865ccb01e28febd94800d0a50cf4bf82fdc6061b3bfdcb796f6c2be. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES50A1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879e1be6259f984e1bfa9ba8715fe66bbaa02c31171f962b4a50ce537baf93d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES50A1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c9fcb05d3032882e18af0df2e3195b1e2a2ad301ee91b4ccc6a22ec266fc5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES50A1900102.
Nothing But... Deep House Vibes, Vol. 08