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 0xa20e9195c727c0346780a6e6d819993171c8da0cb0dda55825bf2ba020e88638. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f44d7b22-a6e5-40d4-b7f2-197e4da12378.json and https://artists.proofprofile.net/proofs/artist/f44d7b22-a6e5-40d4-b7f2-197e4da12378.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die schönsten Kinderlieder aus aller Welt (feat. Spessart Kinder- und Jugendchor) [Gesungen und instrumental]
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 0xbb41363b8ef5eb04267cdedf1ab3f144b2f98ce23a309a1166d89ba1eabf86e5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEW911316501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2948d49921755043193231678d9920b84062ce12b249ed4829688c777c664a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEW911316502.
I Like the Flowers - Ich lieb den Fruehling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be9442db42101b87d56a310d3c7430439d39e3c2205da8a428e265ce8bd2ba. 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/DEW911316503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451f5400ec5f74f8e97dfd0edb4aa7db620d92aa32d8aea1b427337783e30f2. 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/DEW911316504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea79ee9cc3312d316d77d6166c4e8946e216ad1141ad4c72a64b12a85ee141a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEW911316505.
Bella bimba - Wenn ich Musik hoere, will ich tanzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7197300215783667d0a3ce34a6982f46763ab6384ae0c23b171ea0a634a45. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEW911316506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c70087b321160ad29545cb300ced7e5924547c2678d44bf9b1f98297e95059. 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/DEW911316507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7293126aa96fd0bea3e441a55a3b8507bb334d1ceb712e0988e2a4f6914160c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEW911316508.
El condor pasa - Ich moechte gern ein bunter Vogel sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67672f0890d555c8782a4eaa01fc45568e3abb80e903afc9f465018d92c0d49a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEW911316509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99910656cedbea8dbfdfe55038314fcd6175f5493ddf4456084d3b4ce7f3f0e0. 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/DEW911316510.
Tiritomba - Fruehling, komm doch uebers Land
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bbe77dda7a708ea35cf4d9446edf2da0db391dd0ad58d59cdbc587bbd6f40. 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/DEW911316511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d1e973c7bdc6c930ee3cc68b514b47753d75fe2ff96e4b5a47fbfcdf503e6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEW911316512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62bb274d3002c9984ad2736789bd85632375231b32a00aa48df04b267728292. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEW911316515.