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 0x14c1da2c05c5b77c0c2a5519505f5a0b70d0768a08563d81935406f050788a80. 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/33a57371-8456-4979-83af-a14627ea128f.json and https://artists.proofprofile.net/proofs/artist/33a57371-8456-4979-83af-a14627ea128f.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 0x23043d44de8718a769b9b970ea8265bb34347170e72c695b9d98f879000630df. 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/QZRP52491117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5652ba8902bad842ebdcc644537c5e6e114a4b7b747896e99e167375b2eab1. 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/QZK6H2497009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed95692f94a2a44b17e15539ca54fc9a267080eb89fd1986661ba7ba90110c3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:26Z), 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/QZTAS2427738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd504cf88f6d4d9bdedded9f7863af71adc956adecd24809c04c6f01d8833b9fb. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:15Z), 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/QZTB32452693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a664245160c42772be1e4c91c6ccf4a63d66e9c42d1313db5ba6e84e0775ca6. 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/QZTB22424162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b2f22393f36fbe44f976089dc2e774d429c296455fe8bac3f0b9de3c207015. 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/QZTB52445746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e21a0a083564e83f283cd9c531fec0f696b7fcf1ba4331bc213e997a758d7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTB62444265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c57e61f2ffe1d955f859b98d8a753a925747c352e99681adfc9c7d7b0976d1. 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/QZTB72466020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d4246c479f6b7b12f9e49bc5651022c58d95b611a7d3671aa3846589a6b274. 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/QZK6F2485219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00831e1b55b4252da85343bfadb738c051c7e97b1276d83b3c22ac9c1e831c. 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/QZNWQ2433710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307341fe7fde83b3d39aa95604e61cff80730bff6d5ac325281937ac223d84d0. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZMEN2463170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed085cd4ab013edf6c79d76c69a11debf6e84cf7aa969581859f2c677bda0ba6. 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/QZNWS2422550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd57c134b627157108c639145758920a83935ce2505796cbb132e87e2e0ef0b4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWY2442742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1bb55b7cdc809d7bb5b70d2b6a36acc07c21f76e815a3d0b7e326d36e46c24. 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/QZNWT2496849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b417a04e1ced616d662582da664926720dea872da2997719b8eec8fb8a8fb. 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/QZTBE2469048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d27daaa46f8a1eecc06993875f202360cae4d3de6de03f2571c85b89bd46a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZWFH2465428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022d99a781180a54a3fa4d0c0a4cec1c17cb60f110303847c72962281e57ae4. 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/QZWFN2444413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed2a3278f27bb79e94192f423213353d85f566466230bcb63316d8e88d51bd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFQ2451212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e8c9d72fffa9e9d1d1cc38f11a03192677b7e33d6fe7510daa582f24539a5d. 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/QZWFW2419653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4abaee9d595f5164a146b5eff9baf900b391379c02fe3c38341f7a24a62c6db. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7M2432487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b282407b49026bd3daf45d090da0c803272116d5bd5c0f3c2e0254a0c2254. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7N2494418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dd1cb6fc2dfda1559c6e049940e79a87ba7559faeab5c130ddbb0de0cccb75. 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/QZHN42525888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec62ae0ba990d6b06fafe46c7f1189496545ece273f5dc9b503db1307b49b6e6. 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/QZHNC2519278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05805039f7b1129ab7ba0da42c14779b2ab6d1c0e2e179b35e35fe41c060a92. 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/QZPLS2581529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5cbafd2fcfbfc5f0059766693eaf94fd1b2b62ed155768173a8e0c9e01ef76. 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/QZZ7Q2537724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26d529a2a5c4dafd83283c4ab884105f06558ee32f9add909e232f102f89134. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7N2509516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeaa6fc84cfe4569148c622d8fa0c4dd668f8fc89d79e32366491b94487aa65. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:34Z), 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/QZZ7Q2543310.