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 0x2dce2a35963fe25dc29ef391af32b8e8c9c4a4dc1c62cd935555ced7f08f7fca. 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/40560d4f-c20c-4c5a-a2fe-9ba8ad568fe6.json and https://artists.proofprofile.net/proofs/artist/40560d4f-c20c-4c5a-a2fe-9ba8ad568fe6.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 0xd5362a41f01ffc921fc17ac29c99b155ba07822c13fa5857e961d6aa9206c741. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:19Z), 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/QZDA62032816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869c69d7b456c56cda08bc01778d189fe5b54f73a2e29788e6817e0ed350d011. 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/QZMEQ2049102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e0a5d926c096eb85f423d1798ceddb35db1eb320e5349ffb23988a7cbe038. 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/QZES92129208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cc574fde36a1bc728ec9bf8d26ece356811a445930a957595be95697eed632. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNB2143018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2436f2ed572bd04c039318e8cb098e3ed04ba39e2249532dcb6a814653ae1c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6J2196040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3037b141872170c85c4373fefc5c2765b352b7246fa4ac24e349eedd6173c47d. 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/QZK6P2127721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2940f16459057d455eb127258f8d7e114677d86138bf6ca1c7c78ef847b562f6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES92129204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a96eefcbfbd53b411d221b2662c062fc1109799c81ca61ebc259e0f86d5ed50. 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/QZNWY2140849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8469fa21974f97092e4b76b65ad2831532d62ea6442d600806afd6c9d90a67. 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/QZDA72218059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919801e174af28d614307731576d74e9d784f80ea89d98b221324e150cab0663. 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/QZDA72218060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d215941354c58d8fe39181b77e5c2ec560caee3651ae195173c84cb07d2f3f7. 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/QZMEQ2185144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37deb1fef107a0437f9a64c4bbbd0276d0732906a5c5911e47c008938067c2ce. 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/QZNWY2396412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d61e4c6769d5b69f8fcf56af96e67a58ad12700f7a6812f48df561336fce2f. 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/QZNWR2344330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288bc988adada3c60767072cd2457fe860be815aeb4fccd31d20e8c7461df3a7. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZRAS2450001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288bc988adada3c60767072cd2457fe860be815aeb4fccd31d20e8c7461df3a7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZRAS2450001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0aa1788fe271d74e970a5a56a479a6cd1ba81952b733485ef48517b3cab42c. 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/QZRAS2450017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbabfd874be1b26261c2edeb102506b25a89967d4461b0151575ac035e4c7f55. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ7L2464086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4d1fa6db1ded5a7b624ab8433b61bf1169985c37d77fb8016420a2447b77a. 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/QT3F22469352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867740011037e1e7a91c9e8e7fc33319a546d0a0967b63b48c89bf564ae092d2. 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/QT3F22469353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ac7dbcf08d7584888f7d084dabcb16d38d3159b5c93117441695187d2b0251. 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/QT3F22469356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2989c48735f276f7edd7e0867ca6df6288d38328f17840e015c0861fb59dd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:27Z), 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/QT3F22469358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547615698e62daaf671363aa9a0d0723abf834cb34cdad1444a2a46d172bb60. 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/QT3F22469361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742c762154b661d2adb2ea6986699266ed079858e36c451372757886e24ed086. 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/QT3F22469363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66111db96285207ce4e763abba9bffd7adece4d65ddddfc75f8de7ad759b941b. 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/QT3F22469364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e61fba6338c7c74937cf6931d8a6ea1c765ce4823e64d18a123a3e4d1f29622. 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/QT3F22469365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209280fe53aae9d24d382fa96121a264d43e8494a97082d41f38c94d07050ce. 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/QZNWQ2529407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5420147c52a380c1334edc07ba3adafdb1ef45c6db97ad95f074b97b6abc00. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWQ2531810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc679897eb2a21e14ce07ceed81a91bd440676ccd2dd9a319d3f78504c84f68. 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/QZTAT2519379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b17bac89c1f70ed30f55d28cbb5467e6b8124b161609bda1f15ffd70e37d43b. 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/QZTAT2519419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb641432374a9bcf2a818c63f3e4880efc3b56afe95fa2d0b2aeeea1d4c7dc44. 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/QZWFE2536572.