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 0xbdc826b12e5898225943ba7e1f321607bb2cb6d41f97370139b29e18cda66032. 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/1c0f6e98-3d6f-430e-99e2-5a95058895ec.json and https://artists.proofprofile.net/proofs/artist/1c0f6e98-3d6f-430e-99e2-5a95058895ec.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 0xa1bc35ceac9ea43093784923a7101c2c9da924130723210cf7778d7f5d124736. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CH6540875453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee523d95c0949b553bcb5926a315fb08697a337722511206dae260be7be4875f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CH6540875455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a0a9f8876f2bfaa41d07a1e99d8edb28d1874ade76b7a83f69418942624909. 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/CH6540875456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c157b14780f96649fe8c654aa0ba6cbfcdc792cffc6824051028dc650c6e7d6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CH6540875459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5459c224f9d45ce0929f4387887f6c800ce1269fc114efc00f6d002cf356db0a. 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/CH6540875460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24269857d5fce9c326b0e1a8569a57d85847938ff13882c282e09c6156994e97. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CH6540875461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f603bae3771fa62432aba92e26acb205988db896daeb0ca929c083a02356e38. 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/CH6540875462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44510e1237e42b528554192790d9116b1276c39321bc9715cdece75f3994a6c. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/CH6451504729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410c32b9e944322aba7cddc9c59dee4501dfbe2b331412aa7b3fa9a8e864348. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/CH6451504732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf036e651aaa8ea8010d014571c8fa3732c48623388e71c59aee81afe5c588a5. 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/CH6451504735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c4e5df60ac7b9296365e9066017b8cdd98967e03f7c7c8526e53d4cb91ab75. 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/CH6451504736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83409286e8ab6b811043e671056e551fc4361fc4ba2f44b211ec596eb2265ff9. 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/CH6451504739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f220deea27c71269dc6f330ef4cc1940d5c28aae7e756943dcf51a88fb2f53. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/CH6451504740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f50e4b87c56b88c07f0499f53180e0219f0b8b37b8777d42dee5a9710895b2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CH6451504741.
Songs from the Gutter (Live) [Live in Zeulenroda]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ee1ed1de301019a597e638dabb7f6700a4aac2ecd80c1b1769ba63e01d222. 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/CH6541751991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed38c80ec1ccd0d14875c4658d877872f2b688a22dfbe7621eae21b449e7f49. 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/CH6541751992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd24ae10c8e5c6fca9ab05431f13b4e791240bc05a61a50ab539b86df06a3d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CH6541751993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820af374f2b4a9b183698d1d8da1c1760c029798609ac725ac93e08dde1caa9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/CH6541751995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c87eb6da923820f7b0f87890250134cfb76c91e258595f74a1761e33eb2366. 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/CH6541751996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74af5f87641274c9f822b17243903c4d976c08c951e00395962166f157793fc6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CH6541751997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bfa4979470039418ecd04e2c75250680a9b0cf1e3daaebe3a46e711c0fc764. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/CH6541751998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d57121112df5441056c29dcbc293be71cd31c681194ea1d67c4b9998e07e2d0. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH6541752000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056943857a2506c327fea9a6c95764138d2befd06a98c4192d0f9ccc4826d91e. 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/CH6541752002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb8e950aa344dc51efcfcc238176700f39a391fa6106f221eb7a6b33d366219. 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/CH6541752006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e2b9ccb244ef486f8da90714e47f698d1f909d921dce54979d7840035ed92. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH6542437511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171fc1d0d8e01bbc761b3cac39a4161a7936652f0aa5d99c496b7834ea853930. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6542437510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5acd5fa22e12b04207d1b1ec176b27cdda853ede58ae39c9875089afd8adb3. 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/CH6542437513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06d094c01b72c593e081d3d3f3b5995e3e57a4d84dd708cfefd21bc1dc0529e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/CH6542437512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b16b17f062618032e464baf9efab2cdff6fd4948f6b9adfa8ee0adfbba3549e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH6542437504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda797ca66d54346e1bc016a5759a459a569387f2010ed8c65d987402baea91. 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/CH6542437503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca3e2eaab431ceef2710e46c4964b08d896d7b8651ab1398854f340a3b1479. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CH6542437505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d037b62451071c35a9993a4eb9098942470ec1576a62e21360572916d6798. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6542437506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba57db52acb807de746b02a76892e1e335f7523991f8433927c9f4d03ae8ee. 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/CH6542437508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96269d4a53675272b647826749c0d5df2e45beddccf4295654e619cd78788e7. 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/CH6542437507.