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 0x36926fd8cffe52dcef9b9867871cbfc4dd7da05eeabfa13f06122e7f537d8129. 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/c5dd0261-fafc-4582-b008-4294a7289d2f.json and https://artists.proofprofile.net/proofs/artist/c5dd0261-fafc-4582-b008-4294a7289d2f.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 0x8fb3c687358dd8f190366916df5656eee1fdca1b51ff6bd752c274377116b7b1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:14Z), 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/QZTB52435498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e538e8561c5af54307a6299bc3be099724b3d0724f41a1c126f23652fae193e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB42496760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7086ffc77c5acee8527ef0c96d37e0c2a5cd0448abdd0da7630afc1cf7ef167. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:54:43Z), 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/QZTB42496764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48218281ba8488501919021f8bbfa2f1e59b82573d4f71cc71fb5421e060463a. 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/QZTB42496765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e81c870f023fdadf63f9cccecc48d1508f9f90ef3c6ed4298b52ca24156711. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB72463573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56664173d73916d70fbba57a703e8a0e0e6aa3f2a0c5ddbbde3bdf065596f24. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:17Z), 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/QZFYZ2518122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385ea8090913d8873e2eafa70e9aa1f696298d063ac07aa9eab974d777c5314. 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/QZDA62579241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ab8900b90e4f311707eb0944b76b341c1dcad5e563e3d05cacc9de7de66d02. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA62579233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54959a085bdb3b49efc52335ff22bc8dd71b3efce8388f9df8653c9dcf4f90b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA72546260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096ba66fa8e0c899aad617c7761c39216f2f5eb40e1f208e439da26f9bf01a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA82595128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d43ebc31bd1f77055f0e23d3a93cd4f41821880f56f01d9cd3e799d964f874. 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/QZES62592030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958283a1e1d127930e8bdc4cac12f4285190adcedc1d5dfad857bc59ee066e23. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES82545321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def331586bfbcc9f4a9a96b75d9dcc5d991262fba0a386e293203179760697c. 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/QZHN72553810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487bd99c445647d833cfe06d74bbf241daf6b50e5bc328f8d94bad51bbd9b9d5. 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/QZHN72553830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107fafc5bdd365c613d3daf787a3427125fd82d7d4916c3f945e6d04a3f52996. 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/QZK6M2553610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0943a016c65ae667861807738804948aef866f12605ab3b71b307ccbc5a111d7. 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/QZK6J2504053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d2989225dbd663cfc8a1b561c3c424dafba5c76c7b5123a665fc565217a8c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:40Z), 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/QZMEN2526087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ed3fb8e7828ab03363460a60e26fe9e1ce5c33cc95c50a344994e991dff18. 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/QZNWR2522186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd350fa552c6c0b3e910289db967e1d2ca624065fc47d140609ad60e18ab4a9. 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/QZNWX2540727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67ebabd70e2f2f3e7be966708aed925cf1015a54f4a1dd6b1f11b7bf201e72. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLR2547673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1db031b59813ca53bf3013cc985c2ab2d309c6d97f22ddd2159c66d8a36b0. 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/QZTB32532104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1582093750561353810a03bf7ea29108eb54f3969c7f3116ddb55ac47da764b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB62549443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f6b227d95f97d990bfbf0d5728394e023dc0ad49dcde11357b9c88234634c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB62549444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fbb49aa4a28483f06a2a4bfed5181dadc539b8a5413ca11dc5a526dfafe83. 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/QZTB62549445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd4e69be646f7b4d697f1d99c5421f9450bd32de93db676416af18e0f2fea7. 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/QZTB62549446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcb695da6917f41e7e6bbe70987b2cc5bf45f5452b380ccbd2d7805cd83ead0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTB62549448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a86f021acceb50eef1bf82af69b2520350e5ba5b8eb77bd6c2a3fc8dfd2e0. 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/QT3FG2501949.