thumb|A lump of peat thumb|Peat stacks in Südmoslesfehn (district of Oldenburg, Germany) in 2013 thumb|Peat gatherers at Westhay, Somerset Levels in 1905 thumb|Peat extraction in East Frisia, Germany
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x326cc4e0cb11b06943d19610f6b51aa9856d7a68d2ec903c9c257e725a24a77f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b4df483-324f-4ba0-9611-daaf1fbc53c5.json and https://artists.proofprofile.net/proofs/artist/3b4df483-324f-4ba0-9611-daaf1fbc53c5.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 → block OTSBitcoinBlock must exist at that height 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 0x5b85e1b053d556658ce80084a266e4a81040a08c57333f4a2e4aa031ba22474a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEZC62193792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c07fc9fb6704fe74f5c1f4ea1759e732bdce9f12a67966a85e6b10bf22ff9. 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/DEZC62193793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2e0057c1eb16311175236bf4289ddfd765b2cfcadd848837ddf2d0680326e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6L2361418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa1f86984b3d2c38e9c1f08088172c36a63fe7764d605da12ad1c3f61d9e776. 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/QZHN32328997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a207efb559503104e07e49ffae24035eec5af4382ab2b84d6b000c0a1b2f073. 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/QZK6L2361419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446015878447c63818fe7fe1e6a5ae3d0ed0ef9850ceb68bdd9fbe06e069e733. 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/QZK6L2361420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1510a494339a53a173656342c9dac6a5728bb827e1dcb97c7229079bd430a3a0. 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/QZK6M2396814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4293d7fcbf64a26d9085aa2ff214cb85cd9d7040299965966ad2e3dfb541c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2396815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63cd0903652de7ef6955e37559a5acf21cbba35b9db9afbe77d4209d2a181c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2361423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03cd01bb2bc3b5dda5a018f2f70a8d0c89892b2e58e4f171a1e09b524fe3ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82384975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400ff992d9b52aced4a6ffc040439a9b869073d910f06d4015d4f7bf8fe19dd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2361426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4e8ac52fa01d3cfa6e5d80c4fcaaf6d1f6807b20a0275e7702eb215406331. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:35Z), 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/QZTB72486121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe888f21b786a0fc3cea844195691b1c1b10310f61c973f7fb40ee235eea3adad. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMER2544630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73db5eac424d1324dad149f8b613e99d1263378936e73a72e3aa3c88dd71ed21. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:14Z), 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/QZMER2541145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88e713f4c6f5430d058e2a6a900deafb1820eb8c5046d16793569ac7a54f80a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMEN2512789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17fb8dfc3af0203d32505b84e7cc72654a1cc8c03ecd9ea74f1f364a1626efb. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZMER2544632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d39129829f377811d2d5af3461cc431d36266f0aa730b011a9aba4320a25f33. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFG2504105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dcc594c0090e40de30167d904833a458f70e0b4f72c643e2ab4cbe592c12ef. 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/DEZC62213097.