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 0xa44034a0d5b7909d4596ac613967ef2abaa8b12ae9334f1c167d1d540d73e8ff. 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/ae2fc8bb-1c5e-4468-b060-8a59d6522b96.json and https://artists.proofprofile.net/proofs/artist/ae2fc8bb-1c5e-4468-b060-8a59d6522b96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Radujme se, veselme se... The Months in Bohemian Folk Sayings and Songs
Kukačka (Lidové Písně V Úpravách Jaroslava A Josefa Krčkových)
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 0xd06f021b6c35c66590f06c991ded8bddbf3e7d26ab0481897c333956f8b674ee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CZA161000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dfc7e3837cdd02bca4c3dd95a8d42fbbc6bf48bdae6d31dcdf337f51b98611. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA161000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219379c25ee1950d46d351b3510168c4eec43cdffef99cdea47d5c78703886ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA161000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be45c9c7e9fce98f83dc890b343e0dc1b2737bc0e9adad5cd99fc01e3a7664b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CZA161000360.
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 0x6856c83302956167658ac4d6168bb8caf897941f2ee5bcf4436cc6b2e2a76d57. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CZA161000365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47bad28f690740bd28567e663a008430608899b494030d4891c5d3d0cd747ae. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CZA161000369.
Ukolébavky Pro Nejmenší (Hajej, Můj Andílku)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4fc10e0a291cba911db027f8535eddd3d1e2fd6d8a9e4d7b706e63f50e6d5c. 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/CZA161200434.
Husni, Husni, Díťátko - Hájedlo, Boucedlo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d1ee2963a8ab3622e7162f879038f03fa859a5e9b39997985d564d673f9c94. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CZA161200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc923e11667bf39569841761d6d313bf7d62670a0a63e4bbd332218c80e2a721f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CZA161200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca6adc206bde20bfcb9da97ce5dc2d28f63a8376862d3e8fc1800d8c3e66d92. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA161200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6874428870cd3a9fc79ec730e1a6f7288f0fe7faf96398196dffe85a26ea3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZA161200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c711943edc8128b0edbeb4baecabb88baf2f43c5ba242d1d1b85bcf65b43bff. 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/CZA161200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc40a7dd254b65238810d1b9940cf447420921a264d74efae066bdc80a35191. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CZA161200441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8234558c9d37da054bfb23cf26dbd439c9464fb067ce3536ac8dca89397f6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:56Z), 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/CZA161200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe893a50935f81903406a59357fc5886430e728c52acef1c12bcb7e0bb3874b74. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/CZA161200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc168a92f37baa2a1484ba04a3a5181ddab0845e05a39210498d194de311e7d5d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CZA161200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9677329fdecdffee583ee5441fe7249a052eda71ee393bcebba7e003dc4ef51. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZA161200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd285e0c2ec1fa3a9ff26c0af0a7871b7c1c3124ad61ba547aaf3a10f876d376d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZA161200449.
Pěnička. Lidové písně v úpravách Jaroslava a Josefa Krčkových
Czech Folk Songs: Hushabye, My Little Angel /Childhood/ (I., Page 23)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3545d731cdcaf2f66e1bbced8674813f3f3857f3067a9786c25bd534e700c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA169501520.
Czech Folk Songs: Rock-a-Bye Baby /Childhood/ (I. Page 24)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8edc1294ddae10b58b6b055954cd5de9c60f872138d5bcb7e25f56ab7aed01. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CZA169502520.
Czech Folk Songs: Play with a Crib /Anniversary Songs and Rhymes/ (I. Page 130)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16016fb54c455134e1ed74f263b4b0645206d16a5d2b1b3f25f0d294ed0f9f3c. 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/CZA169504520.