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 0xc4be9c7ceb1f1b04fd395130fc429aa89dff6e304e2bf85ea555f75dcc2d12b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/197e2f97-12d4-4d39-89b7-c36bde2daac7.json and https://artists.proofprofile.net/proofs/artist/197e2f97-12d4-4d39-89b7-c36bde2daac7.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 0xc56fbcd06b7477b825aa3821558499b0a734c0e2ded78faccd3774cbc83efcc3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:57Z), 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/CZCB82100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8e6cafcce2793b363adac85b15ae628327881f53fdae960372400db57b7a1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:21Z), 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/CZCB82100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584443dd74c3a583778e8febe5b9f3be812ff97ebfc5c5c9dbcee20fcd1a8cd9. 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/CZCB82100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab04b4fe6578394f4309e2a578ca8835a5aea82b052cf5efd06291bf43dab54. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CZCB82100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8742ebf2dff69b1bcf305da138e3819cd9f8d0a0de4fbc2cc16070dd8f513c35. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZCB82100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8993cbfc2440b90dfc4589cc5b4054c64f5ca82aa31fb9ef98afa67f35b517. 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/CZCB82200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffbe24954513ae59298111c792f0cebab264c013f52f7b90adcddae3aee128e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CZCB82200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336df1d29ae02c00f2e31b717e09cbbc26f12b2ffe4de05b63b703198856854d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:34Z), 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/CZCB82200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c117c3753915a570aa820c6fb4e4a691a05c8f26d1aba44a9c89cfd3935db5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZCB82200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43415835820e6162fce534edab1a008a1de7c8a1651dd66550c5abc099fbdf77. 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/CZCB82200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0ebe92ce3abbe58e2811d52a84ccb59dfd659952d5c3982ffd7614eb0cce8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CZCB82200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787cfcc18e314f0919ab2f724f29dffc3ed986a83439e7a3cb801ef0222f9ac. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CZCB82200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5c24408de9487957bd40179de0515c4bd558ebfbc5e037044e4e18ff07f18. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHQ2307602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa1a125c239c52a11a501cfd3ee650c6daae940fe03dc70330667b15a71126. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZCB82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e8d1e0c7c4e41f1560e2c169d40bb3a23afdf27b52da61e1eed441a35c31f9. 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/CZCB82400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab36e1f445839e4f9815f61fd4c476a8b2330020cb11c8ed0cec45d2b40dd40. 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/CZCB82400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe752b0c7f6a319795fb285b56377869a7bf8a6c50fd3367c741c438fb6d886. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZCB82400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe538df3de9334cac8b6c3496350c8b99a08d09bab13177d2dfc14fb4f1194b. 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/CZCB82400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d6677df87b88c5e49ab246356a35939a1b34351827a630aa6f358e060a2a46. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:05Z), 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/CZCB82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab798c159a7a81392a538a1678263a935b5a82ec33da80273569b110363210dd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZCB82400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e8eab1bb7ad72ee5fda35fbc5e384ea0703827dcb9d27dbc79124faef4c8e. 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/CZCB82400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c061a308f70176a60f9ac9510c63b758990a9ef837eddbff46e5a6e494279. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CZCB82400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c584bbb410feecadf90a0c98ebf83c3251db4f0a115f1590fdd30908a85aa. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:54Z), 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/CZCB82400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48835f4953039111a98321c41cd171d5552a581c152eed454aa0ae0af85d824f. 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/CZCB82400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f4a38b6233a8b803a78643892f3b656db84230a34b98aaaa0e99364a0af77. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAIJ2418865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2b7e08a4aeda80269e6df9bf726f1e0c81e0a239758cd300d27e6525bf7aba. 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/TCAJP2551110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab3e05e73920f14e224c75e457a84b58b5586923f0bddd0864296b05b7f8518. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:22Z), 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/TCAJQ2512942.