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 0x3c83d7493df9f54aac357d3090704bbe99c380c03f8509c0fab74b59c94fb9cf. 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/a4a1263c-084a-4bc1-ad1a-b2bd0e3093ac.json and https://artists.proofprofile.net/proofs/artist/a4a1263c-084a-4bc1-ad1a-b2bd0e3093ac.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 0x2a044350a2e01b3ae922cc4ff3967124f6fc395f9b43a9076f0dc37e0daae1dc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAES2051926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5247689b67db036436fb9e33ccd453f68df8d30a95f951146f4198013c1fa911. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAES2051968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda98690c229a10457b8c3421a33663f41b2214c84b36b9d7b80eb7a0452d149f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAES2051996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02216d2d4a0408554293c8fc8a75cc0303ac637a7ef989f253cbfb266e53b58. 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/TCAES2052068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a822c49eda21e08de16163edfc51855114e68c1f96ef0956304076cc641b96. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:57Z), 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/TCAFN2144337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad623cffc13c341956912f606ad905dfba7ed96124a8e5fdde1529b5783c29c7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6P2188605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256aeb1a4b82badbfbcc993b41305ef57d82e6f7d8f53f39132c6ecc78b2d266. 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/QZK6P2188606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c130e8369d8084f751b1165dff21355bc2306d8221a9caeded88ee9a3dd91a1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6P2188608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee933e0a208de7714d213c115594e354f88eab5d55ca3be589e00098af6bdcfb. 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/QZK6P2188610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a822c49eda21e08de16163edfc51855114e68c1f96ef0956304076cc641b96. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAFN2144337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8c2d196b4b035637fdef28580e3a325bedb0490b685af6f283e1ccbe2e6a6d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAEZ2013830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61157b860ed08fcab80146f5df9520d2ff73bb58a904c230f92471c73e23d13c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAFD2097548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a423eb46d07d152a510ab717614f50e03319f8769f7aa27340466724671896e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6P2188615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330dbe5083e694ddddeb24a00ae593f7a9da8d2020bdd107983503d4debf7f46. 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/QZTAU2161497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2587d74c9d8bbf18b0f7a829d77fa321d662c09c2087b5e2d3e4bf9e87828c. 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/QZTAS2362685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a5ffaa5c2ed14a2372a7a1806f048edb53ebe4bdc5ca37eea2847df2aa673. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6P2396188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f210386d7a1a3034e55b3ce9504819c904606d6e0c5e51ed1f1d562b309b3. 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/QZHN92222698.