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 0x55ee905924472413bc5a23bbb6d772d7d59fa348630956cb6c5e996f90776140. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee64d39c-a919-40b3-a38d-66466cd6990b.json and https://artists.proofprofile.net/proofs/artist/ee64d39c-a919-40b3-a38d-66466cd6990b.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 0x470093990e5d1d2dddc57ab899d3f8d5b0affc5f7729f1227d165d3ee009bad3. 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/USDO19800002.
Ipan In Xiktli Metztli (México Mágico Cósmico, en el Ombligo de la Luna)
Suite al Culto Solar - In Altepetl Tonal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f29ea4fabd83f5f1d2929c696accdb35ecb8a328aff0904079523e9f45d5b. 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/GBCLQ1700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf695f6f7d5f5a87a371d412c06ea4dfe8a04ca1f1053e43ee8970f3a39d941. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBCLQ1700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6f2a305c24efe44969a69b34fe4988b6c1fca9c3d157b5bb9694dd710f99b4. 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/FR96X2094554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2e34c0107651cc07924fcb4baeb47bf382736394f16a40a5af8d63f6a6e13. 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/CAC609440090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470093990e5d1d2dddc57ab899d3f8d5b0affc5f7729f1227d165d3ee009bad3. 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/USDO19800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470093990e5d1d2dddc57ab899d3f8d5b0affc5f7729f1227d165d3ee009bad3. 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/USDO19800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46194b23204d4c553c604b533bacfef6b1777105b59a40d68adca9c4e19063f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:31:47Z), 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/USDO12000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb42489fe5fb8ac2c045600e36ef9c51d0c7e757c6de957b314e45026b5b02e4. 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/CAC609440020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32c5435ff80022025e702cbebefe48b101ade187e2f96385721c97ef5918457. 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/CAC609440030.
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708667cc6fef731f73f6369c93564785f71cf1eabe6aaea0d15c450cc4c8d31. 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/CAC609440040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91253f2b9f624a7754f4224d71d9b3ceb58f1b0dd4c7eaaf8facb8313ed93a68. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:06:28Z), 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/CAC609440060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d838c8265f52b97b5df60be927630746322fca0bc67df9406a00c092d208b22. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAC609440070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2e34c0107651cc07924fcb4baeb47bf382736394f16a40a5af8d63f6a6e13. 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/CAC609440090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de72a51192fdb84ddf05eebb91336e7e85a924a9deb54615db392b8467a3635. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:18Z), 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/CAC609440080.
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