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 0x592cabeade7e9d394d75c01e0483a7a798866d1c8d8c3a98e0b0a948d3734d6b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c507a8e8-9bec-47e7-aecc-a6fd54bb6016.json and https://artists.proofprofile.net/proofs/artist/c507a8e8-9bec-47e7-aecc-a6fd54bb6016.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 0x8fdd97797802b95fce7a7c3c60989d3a92e58278c73f9e7ee7d783b8fdb3ee5e. 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/QZDA62130853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5ee01c86f2d018212f0eaec02d8bd200ff4b678cce6f0595261f7adfc81247. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:28Z), 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/QZDA62130854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83fb6dbc2d595536611c2ffbcae63659492f42cb674cf5c1ff1d6807109572c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:23:47Z), 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/QZDA62130857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14886bb3de45eb0b71b9df8ba1e1208031ce64afbe4c135b438dda699aa5c4a3. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:30:58Z), 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/QZDA62157840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f7ead396627f85ece8a87959eaa099cab9e16efc090e2c2c4c8d0017e26e3. 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/QZDA62157841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29403cfd82b5867f5ffb51f4a90ce52718fd2ce5811d41fa8969876941d9011. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA62157842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b32de42305b664bfc0946c7b5ca435f6038a56c72d42f6d351024ac83ebcef. 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/QZDA62157844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf28ecfdca907c6e405c0897a01c471bc036df1c678c2e0be12bd7f3da716e66. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZDA62157847.
soul singing ceremony (Netanel Goldberg & Sascha alexanser, live in Zurich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d07abaa7b86fedc24e16ed460db586f57be91db5587aacc443994e167cee1cb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZHNB2338772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe541977b80497ecca188c3d113dbd7a36cab6fadb9a70cb1f859f63230cd9192. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N2381570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae4de59d2d1a515d60a3ef8fc4e3f3c1bb942b85497f595bf7dc4d06ca71a6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2414285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc39a98669a35a096faeca633a117a931880aea4c0fede372ec7f06b8a21b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EY2430510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5a19ac43444ea162c0e18ed8cba0a7b93df97b83036a393d646514625cefd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWZ2593657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be506e3af782bdfbf7c4bcad398192948bcf95914179b78f986004a298fa45. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLL8M2002073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a2e8778914b3532862781f001b033f604b514e2b3318f312f5205ec9ccc66. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2425224.