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 0x8427f17515b37ce1340123e526f467243c44512b3aab0abb4be5d8a1acfa54c5. 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/ffb6302d-8830-45a1-a8a3-2fadd29abd50.json and https://artists.proofprofile.net/proofs/artist/ffb6302d-8830-45a1-a8a3-2fadd29abd50.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 0xf350cb6bbf2ff0832b2d47473f1f950e3b196fd147c1f5431dc6d31cd6998c32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWZ2022500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f680922ea17a9c35e024932e1926ccdf5d353a943a5eb5fffa9424427bb8b60. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2020302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3d2a3ea394f6d067ed8defe7399ea2de68da7cde6c7969853d7c0597e4d298. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWX2081273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ff79b7a98640aa47a25b4f53845f8fdc5d8bb2cff550568f7d9481937b847. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWX2081275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4452de246d002a645df0396d731ba3f067e0f93ff14497c083f8e33663e16d6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWX2081276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f226cad42eadb57e920d30db48d62dc91455aed67c1f0a30e62b7836af88d4. 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/QZNWX2081280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13f89f796395ac50ed1a9628485791430ef06e142195d79d31b89e38297e27d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNWX2081289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd567159312d68662d5f7f86379c5c8af4f939b8f9e4be7d6d8b309d3b8733c4d. 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/QZNWX2081290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e8a866debb4dbb6655d5f8336da00417df2225ef1297e1300715a669816f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWX2081294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755c5dd99708e19954199b4ea403d77c8657f2668793dce5594ebf40d108cff6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWX2081296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebf93922011abbc6738e055a26345e40118b0a7bb83284f7f49fcc135dac1c3. 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/QZFZ22138121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c54d6d6a062c9cf82aa090c0def94929df1cad8c10b32fdfa47dc73737c5e1f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZFZ22138125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b0518e0dba200eebf0d9ff8efbef595d1ed0699af4f4d8fe746e491ae56727. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZFZ22138129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877a5e7875cf6f2fc429f91aba4816004d8436718a752ea6812f2ae849f0b45. 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/QZFZ22138119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a40a35d9fc1032201ead517ea0418854f2cad677333be979116755392514f4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHN32149311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5d97cdae16bedce784c60809d4d9a27e1ad1ba71c7ad25ab43d68280d486d. 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/QZHN32149321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a40a35d9fc1032201ead517ea0418854f2cad677333be979116755392514f4. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN32149311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ff868ddecdf467df174e95ea31bd758e513905c26a940103217085b70b19c3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN32149313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb54580c43d269df94abbae2659d1e972d8dc7696fabda69444f73a40a486c. 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/QZHN32149318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5d97cdae16bedce784c60809d4d9a27e1ad1ba71c7ad25ab43d68280d486d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHN32149321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe838ded577f43db9f27d33b5ad555a76c8288719664c207fa86c9ac133726bb5. 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/QZHN32149322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcaf6187dac1dd99797d16edfd2fa2d78ba14e9e395675784b13a9fe47c6014. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZRP52110685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978021ba5f72843dc8ade7c5133b5804872b29541bacdc156b16b3413e5a8038. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZES72283493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0928adcb7d265e19f479681f236f56f4c32f71bf80d4dd4d0bddb4e780361. 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/QZES72283495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b0ab9ec2428698d3a8010dd28f09ce4146f6110e071bb6a6726ff43528429. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES72283496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc27ae7aa2f47b76be98fbe2aefc73dcd1ffd2f3297dd87a2312fb346f38c1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZES72283499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565431fe20d33f3478196d94e5e3a602523594acdebeea16a77abd6dbca7042f. 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/QZES72283500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0e740ad4c8e7afef485cacf0ba81d8dab33ae829d06de6828df58f42a31586. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72283501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e262ef6b6520571d37b47b18e06f91516182edf2a5d1ac6330c59ec0916f242. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES72293415.
Más Loco Que Ayer, Pero Menos Que Mañana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ffb4b92a8099468f66de3d8a7ffff21969b94bdfb52092a5104e81cfb3e362. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2218326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ffb4b92a8099468f66de3d8a7ffff21969b94bdfb52092a5104e81cfb3e362. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWS2218326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7146117a63d5f25eabda3aec57d493b557c6abcefa300d1e89fa3cbf2ad250dc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTAT2286325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3e01fecfffef7441772fbbad13e1b0a941bc7fa847bc68611fdd6e58e0f1a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZMEP2357783.
Nací en la tierra del nopal (Homenaje a Lefty Sm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0dace48d2b3696b7852296a3bb38f643ef59bbd18e6a6603a83889f1f126b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GXHND2510614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d7f5cae27c2b31e0eb580a835b7e14c0a8c1e820aefbabd091c4680a8c8be. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHND2523786.