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 0x344776959def160e7e52817a6fcdaeed325ff24fa1bfbd235d61ea8fea874a59. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a883f2b-abf7-4571-a54c-536a7f9b7f09.json and https://artists.proofprofile.net/proofs/artist/8a883f2b-abf7-4571-a54c-536a7f9b7f09.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 0xca97dd6842d35922fbcefdbd4d6e6de269149b0178896e0889fb009d27ca667b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US5UL1335536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06383f7763db88072caf27db373544ceb24fdb10e97b87c64431814f1b5a5b1c. 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/US5UL0925179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07087ec3f6c416e502b19bd3e175435314e1936597dea0991baef9592973ba3a. 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/US5UL1440250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c9d01f17a7fb06ab39a92102650f48fd74c40e7e365f83f31795b814268407. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBPS81513071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7474be0f0dedd747a5015fa41b82b6a151cf6ef8209f9da47998d34e141f788. 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/US5UL1237554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00823452f148f481055567e5b678741e12f2629c1b1dcf5eb1297a0cfafe45f. 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/US5UL1103792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721ed67f06772be72e59f436af582844a50606bbd9c9b4c4fff1c05a9fe1b75. 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/US5UL0764030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc0f3ea0f8ef57f7db1c183796034bbfe9b50beb4b92fd232f42b967912cf44. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR0W61758283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc645de960238566b450fe5f459f19b6e3ceddcb341cc941edc36c4d865fae2. 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/US5UL1043327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1678d1d4c11980eb0672b423215c0c0721e076a3d18dc110b5ec6151ddc93dce. 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/ITO101253961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036140a23fbedfb86fd6749402e6c0153b61ad07f10d1902c612213f453ff06. 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/DESJ21300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2be3bd4fbdb2103179a97064c7fe27df1aa32998e167e9cea7e68477abf0982. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DESJ21300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e0c7196a30e68ffd70419d000e5a4ae7dbf2f9002edc72d044ee04ff6e7488. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DESJ21300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdec0feb1844d4901c3fa430dc4a658d4360105aff8bc440aa6243de25462b5a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DESJ21300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0a36921ca3e969137cf675bfc9d9043ec482952eb72e9337632b8b7455dcce. 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/DESJ21300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cc1943ecbecd33843630397954da5d3d95d4480f523876a9bb8337d641d41c. 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/DESJ21300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c525bb3c58cab919c7cf2b3edc63db945b822a3ffbcbdffeebe50bad68967. 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/DESJ21300264.
Anton Günther - 25 Heimat- und Vaterlandslieder