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 0xcbe78f76520fb88bdb63fee1591ef88e615d535ec945ae9c15d6a4f56e0a0233. 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/07457e52-fa85-4e3a-99e6-a8766e4eb110.json and https://artists.proofprofile.net/proofs/artist/07457e52-fa85-4e3a-99e6-a8766e4eb110.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 0x3133efe53d6aad7cbad7a0b58a23dac7e202ab7199ee9138c82facb7aa0885cc. 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/QZDA62130085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59578e23d9c66adeb8f6c09f3e8000c4f1e237ad09ee3e7655077d4af810141c. 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/QZDA62152245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e98ed20d80c09cb7a540f3aeac1f7f88b742d2d4850bcf0739da17c1471b4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZMEN2118279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a191d0e64a194e1162d4c9d86ace7a0d96268e1129b315350cfa8c651566568. 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/QZPLR2117395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe7675fd224588659898ad7c8c944621836331267e7bb1d9ec76c3c99c3f9b1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTAU2104345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2688ada882909c13455e183e7278cfb216ca5c79c5e39f57619f1df86fcd0202. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62205881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59abe1bd20f01a3203b723596b40662d54a77e21a05b041f41c567d65ff0e3e7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN62290736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05e1a77388e882febd3c3296d2825e6dc8f11f5ea9bff8d8032d98d774add9e. 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/QZK6G2299306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fcbd8f27d7f9973e740a2b4de9e11c9a87f7b10a9af9962bca939cb2d2804. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWT2228919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e041326c6cb38daba04614bc692f245b4a6a4cd93e84b867ea739a0873a8109. 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/QZNWT2247572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a63decb3344170f8375c8837a523abfc5c4a3982c307fbb66759482892c305b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZTAX2231963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c0cb8e5c69d4df08efc26474eef7c5d59a770f333a426792cfa5db6619da89. 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/QZTBB2206750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b9fdbf993ad755afa77764bf9ccafea7b34b6b63d687376e49fbbe3cce1166. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ42336679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83ce4c6ee2552a60a8a59358d5d3cccce2765a212bc4b6676ffd8537fcc9e3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZFZ72347671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aab5ec31b4683a52c23afdbd630748ae11e85be5e5331c2c37fc44b17018bb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZ5AB2309639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1f315d7e2bcc2282eecaf515bb24bc2e9dbd0c7ad6f0521f599c40c3c7cad. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZDA42312786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607324205802b062ec14dfd0cdb8eb2adb14f3785f00d6b010d7763da6fedab. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZK6L2314200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ddd81e249df0f42c232716ccc26a5915aa4ca63fe76aefc222dc1077a373b. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZK6L2314201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947d2e2cbb200cb9e34016c77e227f89ea8f3c544afa6a2a345fc3957422796a. 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/QZK6L2314202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4acff5498ae92740a0dedf6958bd8f25da276ea824d5fd6666f7dc3fc40d3c. 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/QZTB42370527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7b0130f366fa795fb152f06826238dde706037fcc7dcfe5db55c36ed2ba41c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTB42370529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb655f4a61a1273f80e098c78167ed95ddb334242e47ca945a0a6a1190a79e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42370532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aab5ec31b4683a52c23afdbd630748ae11e85be5e5331c2c37fc44b17018bb. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZ5AB2309639.