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 0x9dc63f2950bddbf74368ab434e34857e0843aa47db18bca3122a6e6e3482090e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba6e0a8e-2707-4dda-a0a7-85eb8b97bfa7.json and https://artists.proofprofile.net/proofs/artist/ba6e0a8e-2707-4dda-a0a7-85eb8b97bfa7.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 0x3862c494c124357040a5a873637e9a9c5671f46a024c6fe4157a424e73224d7b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:39Z), 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/PLW011700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726229b7b9247b13baa37d14c574fb13438b964ab8c49d512095521e88ad220b. 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/PLW011700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff082ea4c467d224d43ff69349c7f7b05410edd901a0f0778084fb6b19d408. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLW011700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ea8f3e0915eca97da52d47ec66c9b64f4c31d06726d938194afc2c41acd8c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLW011800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b479e9acbaca64d58704bcdca1af8f63749a55d8e7cddaf9360c8b85b82baff. 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/PLW011800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde52bf8c9563dce821015db0a29b525318f0063dbc0820bbafc5b4a72ba95628. 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/PLW011900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9655db0c904dd0f6d7da704f04a1dc823281b1501cc1ac17854b3dcee6f8160. 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/PLW011900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3b86202e8697689c92b82107eeb12f65b82520ada73542ad1fda2d779bface. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLW012000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3b86202e8697689c92b82107eeb12f65b82520ada73542ad1fda2d779bface. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLW012000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66dcaa287dad73c2dd2a47ef5d741233ec74ea36357c63f1e777606d2ff56b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLW012000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce01579dfaec7b2cd1ed51725f4e2fa4421c3711b0e3fbb887d34106d79b077. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/PLW012000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde52bf8c9563dce821015db0a29b525318f0063dbc0820bbafc5b4a72ba95628. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLW011900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c87129d20cbda18fcde41fd361f3d701a926f260f2c05502c94bb1bab41bb. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLW012100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80aa710f43e654aba80fefcf85e6c8d9bc50c3d719b3ba2ffddd4fb7b589cd. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/PLW012200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40900de54140769eceb4ba1aaa6c3af492891f132ac2bc96e92cbad2901626e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/PLW012400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e0b52a030483d95e03e1a550be599ade9cf1beefb6ddd5e5347e9544540f0. 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/PL22G2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107592abb8358618e868330d7b317d0779c982ba789cc573b2564714096a5ba1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLA681802238.