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 0x0f8c1846365733ce71784932f491b73469bf95ac51caa6b57d992e69e3c38927. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e30b1c5-a878-4b3c-b521-75cb03a8aa16.json and https://artists.proofprofile.net/proofs/artist/1e30b1c5-a878-4b3c-b521-75cb03a8aa16.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 0x38f956e812a66e56bf3f2c065e60edd7df4fef33eec3a84644ed053c2a21fe00. 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/TCACZ1783412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7437e950e4c5da96812881ed6435c0ae5551862369274985c4301cf55f4a8a. 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/TCACZ1783415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5dfbd0b83b5d0b9914dabe80be3a00a212fe1e5f04facadd7b13c1e1b694b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACZ1783418.
Einsamer Hirte (feat. James Last & Gheorge Zamfir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392cfdc7ab21f71086e24c020e19207d7ab49f9e1868f1512fdc8ce391a1b790. 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/TCACZ1783420.
Children of Sanchez (feat. Chuck Mangione)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd6c9822d7903b4b5f1c0865c1399700452f6cbe2ebf9d5235771100960fef7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCACZ1783428.
Ein Sombrero Für Guan (feat. Wolter Kroes & David Civera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506e0d93cc80b5d08ffa83142538664b03046a1b7786139a4267f00cc79af68. 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/TCACZ1783435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02059ad412c57a9c7777d8a97991b35d2b8f61809a10c59cb7bfad836013338. 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/TCACZ1783439.
Gloria En Stefan (feat. Gloria Estefan and the Miami Sound Machine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec85953d8db78d5295ab526b5810c9fb0923ce1eb599a6b2da2f08cf0c74ec. 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/TCACZ1783444.
Hematje (feat. Zillertaler Schürzenjäger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd91c7b48ddcff7998dace36184e3139eb71adddf7ec0f8d8fc8e10ad772c60. 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/TCACZ1783450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3c07540822e00076e18b3193e6a0812517523e2030a5beead8ea818e6d2998. 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/TCACZ1783426.
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 0x6edd6325e48f08aed4cae7e6c3de0666f9574e6fd89d775feadadf390971fe4c. 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/TCACZ1783442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9fd400b6034911904a5a504ffbdae516af2e19243f5b8e12da4411336e1e8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACZ1783446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74338906ec324fe7d69fd98cdc3c66aae518d808290a095c17ae67d16be6a52. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACZ1783452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098c3a9d2ff8c5d50ff4efea1973124b40a9640e50824377a0cc97f625227e24. 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/TCADE1775921.
De Jeskes Oet (Live) [feat. Geert Christenhusz]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea7d98371e73451711b9e4c988ee0b45663ad1075f08c66a4feb2a58ec87e9. 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/TCADE1775943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63141bfd734c23b76eed600b7da8e5e4541c58069cc96e3bdeff62894454f2fd. 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/TCADE1775998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b935920385cc1ca3a6986a33d6f91fccc3c757de9cf742601dd249ed6d73e27. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADE1776001.
Oh Oldenzaal (Kom Leu Viert Carnaval) [feat. De Ansloeters]
Atemlos Durch Die Nacht (feat. Helene Fischer)
Verdammt Ich Lieb’ dich (feat. Matthias Reim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a086859548818d6468fe6905cd3668f6953b50d54f9056ac06767716eda5681. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCADR1893580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aac4bbb1d2aa2ba9a7021d77d6a0386b477b081b1dbf0006975a29587adfc8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADR1893585.