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 0x7a46014e56b37f6dec7254c973244a6580fe7bfcfddaea70454dda649879c532. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89a9e7c6-8e5c-440f-9348-11fb805b52d8.json and https://artists.proofprofile.net/proofs/artist/89a9e7c6-8e5c-440f-9348-11fb805b52d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Romantische Klaviermusik für den Valentinstag, Vol. 1
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 0x7073ae884edb1b5ceef8267428e9c253495c23ed3d023e7b19acac2dd1088fa9. 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/FRY510778301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9c37c605fcd26aa1ff89c1c11f93a922249afd0c1f0579f26b863228914d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USRDG0112784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c84f581413c40972b635ed36375911ef1ad28abef5772a1881fba2e3395cc43. 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/FRY510779700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1827bec180088220ce2c13b40bd62aef2ed79ab5bbc812e4a86942c58fdadc4. 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/FRY510778315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a979dd0dd4a0d46118fc426447dfcb47c0115b51c0a312eab1a56a991ddb80. 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/USRDG0112801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8016dc2b51c2ee2b2f23499e227d02f5278731132f3fe5119a9e0db0bad8836. 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/CAM460602762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffdceec3cc18187db5dce278bc9ea3d7a05fab87665256375be4190d84aadaa. 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/USRDG0410149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f27d8ca83aa70c106efdb0704558912ce4e6a1fa0d1f28c3c46b328d7ecc5. 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/USRDG0111857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06849c96c93147713e591514afd372c4eaeb42f29612c15e717579648c565f. 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/USRDG0112781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13724516144be2ca9ba10e2c54f7048c0c08466fb420f437686ed81f299e58a7. 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/ITR551316117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277d16b17827852b5bd9053b5794a8cd1da7cdfb327b6bea5ac799d3494883ed. 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/FRY510779713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8a3c1a683efcd643f43e19c211149e181b6c8eb86f22c6af1cf6d5d0b10137. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR0W61531281.
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 0xd5de0ada10a03df69f1478d0c67d40a9714f7a9d91c00e0908b524f12b86476e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USRDG0111329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad8be486b839c7d5312b3f7ccd3d384c420f4a7213616db86c0a260cccbd4e3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USRDG0222706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7922a355d9caede92fa3df478ffa789cd92dd0c7c1bba4334f9b49f59a9c7bac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USRDG0226907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692eeb971f2355060281f6e2d52cfd8d343e76383eb82c5edf1bb361706550d8. 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/USRDG0112104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e534b884cf935844f1261a601de2d8ec8a6d75c555c3a8e368ec1f7d6217e57. 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/USRDG0222718.
Forever Piano (Piano vom Feinsten zum entspannen und ausruhen)