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 0x7943dfe2d2121f8e32f1761c65be279aac5350c8b31651659678478b6eef8d30. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89100141-fddc-46d6-9198-76b9cb7febc4.json and https://artists.proofprofile.net/proofs/artist/89100141-fddc-46d6-9198-76b9cb7febc4.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 0x4281a5754a958051313d9acbd0e70626770dcb2b3de0672820a3cbbfab860c2e. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SKA129343601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8eeb0a9f61b3c9cf1b7bb29617020fda59dc771bfad48484f7be1ea8846fc. 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/SKA129343602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd18b4a39af2f33d4c057d567a77a7f0da4f92c3df910998a52d336ee31b91. 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/SKA129343603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29910f564181b054860071b45ff1e46ac72f85fd346a4b76bacb6590d514e261. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SKA129343604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5aad17ed599770ac9de6a38f5185cc3966c75c44dba5302ad9cf867d8531ce. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SKA129343605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08e88dfdec20ba5b8530c27644d6354e5512fbc685aac1d3dfb25e2557b1d8c. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/SKA129343606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e661ab7a9368bee8d7e492d27dafec4b91e93f5ffd8a7124e037ece66e9311. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SKA129343608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3568be19f65001195348ee35594ce59e237b3ad07f9701299d6b7e9724f7749. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SKA129343609.
Z Východnej dievčatá / Sedemdesiat sukien mala
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9999724f3d0b12a66350f390f182c598cbd7b2c3078901b436be67104c6fa5. 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/SKA129343610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabde19b7bc66aeadeaa1a23ddeb0774f473dc59e82cf353ded8e311907228cb. 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/SKA129343611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e31cbfff871f1d9e77a519607fff482a615048ff3165849e56351f120a00d98. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SKA129343613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c9eed999cbfd84739333c2a036510c0ca5f2b494ec58827baa9b71c409e3c3. 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/SKA129343614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c29f77194e02eeef981f6631c376c687c141afaaa035214e4f2fb29a7075785. 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/SKA120310201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb18e5457cd38013d476736079a56754ac0b276097068dc2e44ecc0cb84308c. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/SKA120310208.
Vianočná omša - Česká mše Vánoční (Christmas Mass - Czech Christmas Mass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3834a980e1fd7e8c3a7bb5874fec164799755b6ee599efc5a2fd9ec839d056. 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/SKU811900111.
Z lúky živých tradícií 1 (From the Meadow of Living Traditions)
AJ TO JE ŽIVOT - B – STRANA A RARITY & LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aeffc0d51f333ca40454038fd291a0ad0b0930d2379e92ac23fc2fa54c8ac0. 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/SKA011400117.