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 0x153867891862ab7e3b7b6e9581495384ef569afbf0209004b1dd610f5881881c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ce25bad-7c90-4a1b-9d76-6dc53ca9bf17.json and https://artists.proofprofile.net/proofs/artist/3ce25bad-7c90-4a1b-9d76-6dc53ca9bf17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Flieger Adler Flieg: Ein Ruf nach Freiheit und Gerechtigkeit
Auferstanden aus Ruinen- Ein epischer Song über Erneuerung und Hoffnung
Meine Mutter ist die Sprache, mein Vater ist das Land
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 0x2370d0db237bd51bdf7dc9cbc89a94f2c98abe58b1fffd956f8565826d4e4d9d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZVEM1874012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3f73356a6c80feefca6a63c9c4ada2668fae2851c20288cffd7d39d17acee. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZVEM1874014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a7e0ccddcf476f00fc8159b2d6e3d272c1d49bca4da84f196570483c1eed24. 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/QZVEM1874015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d4182e2749066cc539c06d6dfbf68fa90efdd4996de4cf34e913669df186d3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM1874016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dee79e562601604fe9a976aebcef15eed0231a5ca3b2a1df8b00a5ba4ee182. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZVEM1874018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58f178ca6dde1e64eae5800b75b91844dfec7f1601245e9d1ffae5bf94c473. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM1874019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4491ae61077339a78651adf308b92244a8ada986ca5cce04126841af0687d7. 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/QZVEM1874020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a159b2814d8b9a761ec3ef239a9572977e166dc6733e63687c7ac749e7acfb1. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZVEM1874021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8097917f840cd6a1a2b35b5228bf043f60783efa256b5be01de12ba8756c9c9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZVEM1874022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b8a0e746f8d1d7eaa8a8fc901d8c43319e22e65f05cbfc32b7822a3ec07a9c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZVEM1874023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ede54e0ce8ea033cb2c7242c880ded62103bda17f1313f6b8222740b257093. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZVEM1874025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5313b673635fa4ec9e1bfab7a4443ea64fad284344d14621150898d7709f015d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZVEM1874026.