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 0xa193b9c3fc90495148959537482df3e4cc34075c57d1b3018751dcb4694e4061. 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/05b59342-eab7-4e33-8b25-1bee9e3ff3bf.json and https://artists.proofprofile.net/proofs/artist/05b59342-eab7-4e33-8b25-1bee9e3ff3bf.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 0x288a6909d151a767f6cc2b82e2f55278532c833f31894516dbd5d18fd4cac7ab. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:27Z), 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/QZK6F2220632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40697a0d2480467cc28a7da89b485bad87287ca3496a8f148ec91dc88a16ae8. 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/QZNWV2262191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f273fc8be5c1a438c3bda3949d8ba93cbc0809dec0f0c475594ee8ffba5531. 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/QZTAT2244970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6605a6a2c9fcd06e80dd47c8a1864a6c456568065b2344c90448c9950506df0a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEQ2361274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d9ed7e7fb77bab69e228b736a908ad9ab88cbf0c0d78273c8eaa7ab82da39. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMEQ2361275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc4ae9229aa88c4e44969b0f21bb5d77c1f744f9cd11ec0413b0ccf58d451f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEQ2361276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74844706a1a32e497d94f0d97e6e44f4222dcae45b4a3aae37dd7cf1f38710b. 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/QZMEQ2361277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef1fe5f1052ebc61be27e82b6ffa9947ae2c5495dfd067a276f850fe0f6007. 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/QZMEQ2361278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60fb4a188b730ddb6fc4b8f161176b06991d86673c15e179e0605a3645ae9e. 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/QZMEQ2361279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5e4d8832c071c03c403e46e01aa1ddac050823b5ee23360bf0fee22a961b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEQ2361280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8531ee8c5e65577e6aa4c9e43acd97e43c2e4bec2a6c85815fbf73c8311e99cc. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEQ2361281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f63f80d7274ee0f37057104c9869929db3f5b639182df84a4ccbb5f8d8f8a89. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEQ2361282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ffbbb1c4a12b814eeca3624bbdb2ca560a59ed98701d01e82dee05e19109f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2439503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674bc719d555780d28e726b3a1563490b58c7e1afe0f90446b68569a6942a674. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2439504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38137de9a070cf581be5173ef4a39fc1e7e4966a6a43f29fe265ec54c430d39c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2439505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa702a9800ff0e13e159e34600e16485b89c571556679b31cb35353de221ebb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNA2439506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886bf7ecd9ae6c29ea898aa9db6b584a8b864d8dce0fa5bc1af0a6d5cd38671c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2439507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e07c973ea4b0808cac397902cf2dc27b2bb7013e3973d6b425d55eabc5350e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2439508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05544d3dc85ba051effcdbe1cd84681b4f7a6bafc36f3db609c61096e9935930. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2439509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961e32f88cf038fac2ce2999c8d17fb3a1f85596ac8926b326a5e7da04b674ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2439510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ba7fb993f8f5bf520bd518ed48d1ea9c74dbf53e7b7f362b38938cac000e9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2439511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68338a4809bdef15b2a867d21e951e4f01fa8d0c394e1e1e45306aac5d58ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2439512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987f2a821a777ea7eab338c3e2aadf62ad2d99eef4f5c1e3f12427f859bb869. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFR2399471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b45c984436a5f97febc31280a6e0de32b16a6a9c2dd1cbea25ab7308e9f31c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2439513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21a8ee538882206b362071dc96b2f2cf23508d39db29c6edd39326b2605cfa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2439514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891fd722a35b8f3256a6a26830d8ee2a94ed11f6d58fec65ed66e9c8dfe7dad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12503017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9c6e76127f5c0485257dcad8fba9002a82d1818a89478cbc67cd72965b958. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB22205087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9c6e76127f5c0485257dcad8fba9002a82d1818a89478cbc67cd72965b958. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB22205087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf599ef69fd0adcea3d4358a49afdaff6e266ee1b0b8cbc9e9462aeb45cc2f2ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12443211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ab33c648309b63b42cf40cc0e31e3d2f0da661519bf8ead41296c516a82ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12445815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83298cbf8d99ab059a24c65cba4f7bf909bf87f933dbfc56c28cc3acd99dcad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12501583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509fddb11b682cd26da43e0f5106e4df8cb07d93c22a1ee1c8a467f840bad02d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12501575.