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 0xa1dd862ac5aac61c3a8f4cf8a054f0ee8bfde6dc07d030ed60d167a14170a4da. 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/0b1d9c32-f673-485b-981c-18aed05be0f7.json and https://artists.proofprofile.net/proofs/artist/0b1d9c32-f673-485b-981c-18aed05be0f7.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 0x8bb7d6c0f766d9390737b68f3a40111917d4bf1c6d165b07d29b86df86509ce7. 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/CZW851700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8886281f7bcb0e528afde060c2727a995f99a541f6f06d938477af0aad2a801e. 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/CZW852000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8e05a8bfd6da722db1487665c416e5f851bc0a14a4468560570d2cd0bbc21b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZW852000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aec4f26ddaea0c57e7b2863f42fea1b616552fada3a0373044331d6737a50b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CZUM72200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963cdd0477ae233f0719fcd487281db9075a6023173abd0e66b4097779d187c3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CZUM72200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8e05a8bfd6da722db1487665c416e5f851bc0a14a4468560570d2cd0bbc21b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CZW852000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da703cec1efbe61ada7b768fc1f2ba699061ab73fc8f2c2c4486a9a868bd1ad. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZUM72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f1ad73100ec28e353c7562c119d719ced6de57227c5f611a9f9e3a5c882f7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CZUM72200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613c8df103db9d04b1861bc5684c799c6c9a96530ffb20cee91ce1d9faa41866. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CZUM72200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7435338851fbd0d3d8a70ddec320defa7f1fc43c4295bb0190c9bfe8d7516a3. 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/CZUM72200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02dddc7bfe6fd67bb24813bfd65f6b110e0e9588c1cd09d4c8f142942558587. 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/CZUM72500011.
MÁM POCIT, ŽE TĚ ZTRÁCÍM (Rehearsal Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032deb5e6c601b2bbc2fa628088b518dab92a165522d8e0a9f8b63937de0b16f. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/CZUM72500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2b19627c063b284a63efb7c5978670901ed75f087bf65f39a520d66b3b1fb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:31Z), 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/CZUM72500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cdd3855a782070991d383da4e6913feadc5b5374ee54dd6ef5454f3ad36873. 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/CZK101900022.