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 0x632b5be260f0fec88eaa3e6ad85d31c932685e0865b2941bd89437ee39a4c06c. 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/05989cac-8561-4ec5-81ed-019a203fffa3.json and https://artists.proofprofile.net/proofs/artist/05989cac-8561-4ec5-81ed-019a203fffa3.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 0x68b627e04631d6fd6884c2ece85e37cc3b5607a32c039f6b6c6d3b7d2a2daeaa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWV2116036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28625fc71d933e58d9c6fe6cc5275dde04dd24724f109d944ae08e1800808671. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA52281924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80adc7568ad0e7b74d11d836843129dcd006495e22460279584e21d4e8cfef. 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/QZDA82214632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed651aa98311a4abb5e3895e305ee0889318f3fa377bc7a54ca872a7d2c0afa. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:39:17Z), 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/QZDA82214637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a1fc21b3f1236e74082a8020eb7adb3aaed596d38d0c738af4dcb35595d07c. 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/QZTB52266799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f969260b79ab9f78687efa3f4ee5a38a5f96691de7b410a483c15b2b1e49ab. 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/QZFYX2345442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e810bc40d469d93d6278838aec6105d56dbc1c58872d81933df9c554aa038. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZES92323437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b157736dd2768c63c39fd1e5017ee676dc863ec2fec381c78bd0ffdc19c578e. 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/DEZC62353578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e85c09f9f188918810a8724e66dbe37d38f77d77f5a4a31bd7b771e46f1226. 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/DEZC62386652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9b69854248d5a903771a07951cf815725bb71a56f03863c285fa385e8762f3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZFYX2430607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbf8ee9738fbb14f261874778329c9ecc4da0d864f26913beaac5c8744761ef. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6N2407282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed6119a03e26d961c677a486816ed7cff8b79059c86304c49d372356c600b0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMER2497361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55ed6a763096e6fade2b5b9b4a5c0f9a3706d50afccb4deb5c0dcc8d6e1b59. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZNWT2494021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c77412526ecf373d09a7cba0ab95a7a84c23633509859a5cd22a8b73786dcb. 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/QZPLS2486557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67bc0bfa999fc9a02e1ef05c5a450715854f74ecbca1994ce948c4e500fc3cf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN62480746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd664f1eb3f7a478c30461fa9a49d5c26ba07b6ee47259d5750ca605288493768. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZMEQ2431544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757895aa059d327ad0da990ebf90e6777a457e55fc135c00289ecfedf9b0e90. 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/QZTB52406996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c5032cb6f41c0b34e4fef80fe1b81d0e66ab0ef3b08866f461c5ac916c374. 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/QZTB52406997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2af5927a0e6ad4d6a636eb76bb37d6538d8c1712ffc9223b4fb39664c0c40a. 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/QZTBD2406536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b213ac1ec483b8162c5c1e5de32151365ac019149b2d3b2b68ac87a71ce3d1b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFE2469811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6b47e658c4f8db4b2b757040acc7b1686fd58a07928d8a4bc845a10a76fb71. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZWFL2417120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdea42c80455d1f3db58bb27e3ef4361d043cd2bbbf40692b8106f8d56bb8f20. 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/QZWFR2479121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0de20d5e42a2c38ce8fab0cb96c55d27d999fbaa946310f718a78bfdd3e3f5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:52Z), 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/QZZ7R2439724.