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 0xa504ff16a2335bca2b10bd9c34bb31cd556ad3223f62808f3cbcb2ce9f7ebf2d. 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/42c27b2b-2bc2-44a0-99d6-2563dea9f952.json and https://artists.proofprofile.net/proofs/artist/42c27b2b-2bc2-44a0-99d6-2563dea9f952.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 0x1c69cf0a965441888d85bd2864921d789614c9c5f53eba721b45842830746d69. 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/QZFZ42554439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc967cae280da6674fb463804b57ca31c4991e3be34d8bf6f472f690e6bf6fe2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ42554440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1522af54c6043749875a8c52862a29ff7ae11159d004cd34ce61024d6fd5a. 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/QZFZ42554444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80709b227ccb01f816bcb327ecc67ad8d86c6331e4f8afe7384a8d47922e937e. 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/QZFZ42554445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731209acaca1546ac2dbf4459cc41ec46120c5629fc294d209015cdd0a570905. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:49Z), 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/QZFZ42554447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254e52966eb4ff466670d935b60240f9bda1dbe81478b2b3a6ae705d8406ec15. 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/QZFZ42554448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2bccfd543689115a5031d028208a855aa087621f6f5fee321267e6dd69b562. 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/QZFZ42554452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d50fe19a655a744b79f22e96bf5752e870582487304a7d4dd5048002c08f5. 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/QZFZ42554454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0be73ec82b586804e2b29ffb3c4e614df0d63a71639105b299cab9dbe1a12e. 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/QZDA52558345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67606dac1a1b1dd28bf4f7687894ca3e07db593d736be21c173ccaea63dbf1b9. 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/QZDA52558346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e5d288d75a319e90b9ac42432d1352203780ce5bbc84f1cb6b43b8dffb449. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA72504836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa331c3b3a080876f00e3c3b196ff33df8ff2a5f1ba49af2e0a48c1aba97a44b9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA72504837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b425b29f9bbf8bd0259bc60469ded8a0aab06422ab42b243e6f93f0f2b8e090. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZDA72504838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95273cab559faca93d6a1ec3de3382bc651de240ed1614518f13c58c559b75d3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA72504839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2773259fc9a237810a70000cd7cd3b777d9fea79ad1dc4c04ce0b7d37691b0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA72504840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f342db7eeb67024b493449cfb933bca058fbe763dc8683dd6f3cd4fa54335. 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/QZDA72504841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61210bab1363c3eeeaac81bfe2f26b547eee6e6c9673b6b94befd0a3b5f858f0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA72504842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7926a48b220370b52dc4ef06e41c6561c216c8ebcf29bbb4c9090dc059e9b5f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:46Z), 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/QZDA72504843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a5bc117cdcd0f0bc7dbf3c996945ab7f399e544561995fa74cf462ac07855. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA72504844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c98c32090c0df7c1e98244ed9b5ee2070398da1776e065aed197a51634187f1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72504845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3941400c0840cb4d9376abee964d0c740013cf8c40c17b531d4a826951012b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZDA72504846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30de94a6ec53a11f91deb15aa4b12fa203ef4eda052786085add8fa29743948. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZDA72504847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc8cc88a2e2372b81b60db84ca78d010760cee7b854c3a19bfd63d104b3228. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72504848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11be61d7c8a8164144b50298eda6e6efd75c69aade5e0a7cc8d01f38eebe5312. 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/QZDA72504849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469a0104c05f3f0460da91ae04f69f2e4d61e451660280d84e559a7e912a7d15. 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/QZDA72504850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451a4da901de7c6187da9644c73a69e7884238168ea5057f1b49f5c964de916d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA72504851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db201a434f9c19a86153f8b19aae1a04870029b8ef4a89a6e5fcfea6139cb25. 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/QZDA72504852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adbcfecb58db0b46be395ff346854bd37e795cc84d23c3004c0746c5536195a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA72504853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e10ba3b6bb71fd59584acb0f5e961e33e910bb32b87769700725cde540c54. 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/QZDA72504856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8258039c7a4044afe31912dd06b0e5ee0586514d126cfc63d113cd21036781. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92513871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae367d17d2572b4175149ac5374a481284df79d8632ab48c63522abf8a5140d2. 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/QZHN92513872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5f40d0222da1515142714dbffde42be310a8a71cf9118aeee22ef3193ccbeb. 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/QZHN92513874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987896f155744a3e848e7911ebe24d9701a9c6d18c59c58f0b73ba948b563c00. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:40Z), 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/QZHN92513876.