thumb|Frigg sits enthroned and facing the spear-wielding goddess Gná, flanked by two goddesses, one of whom (Fulla) carries her eski, a wooden box. Illustrated (1882) by Carl Emil Doepler. Frigg (, ,
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 0xc8f2f2b28e1b2cb012d2d658c9e805603d356fbefd8a99aa4ebc87dd21bff314. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dad0f8d-2f6a-4506-a88d-224340e4ff5d.json and https://artists.proofprofile.net/proofs/artist/9dad0f8d-2f6a-4506-a88d-224340e4ff5d.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 0x1668177408e073e285bb281fade5c56d3013d0f9ece0841339a7e548893bc504. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FIFGG0200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b76e40d2d6384e014d26b49989e892f394481fc51bfaaf9e1552f91f9c5b8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FIFGG1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed2131f8386aaad54f9f1d1468897bd5b56992f9c0eb5d63572ef6c3ff356fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIFGG1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27f218c3f090bedcf2e7c4cf719d461aced8cfc978456e078d33f25a127f55b. 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/FIFGG1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108332f131121ec50391f90b6841066d542a58fa5c32ce734feb677fbe04b3b8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:17:52Z), 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/FIFGG1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c056b219975a5538737f23e131df3d240f7cf265dce163422909d4231d1773. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FIFGG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5520187f9759f4fde3c2ec37a6bcd093b389816091f1a0e8c95100f598cfba1. 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/FIFGG1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a367142e9648969559149c90a7fb8253ef23797e7e3966333cdbe40e9419980. 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/FIFGG1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2224e0d0cc14ed5184e141fcc3821f5d141f41df26735309e4eacaf2a0f5768c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:48Z), 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/FIFGG1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf942d5aedab1fbe6deba33fbb3a7b77a663e718f65dda70dc6adfb79ef415439. 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/FIFGG1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a9eb0f51522729d3be5d93915089771dc828eca23910bbc1ca6c23ed32cbf5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:03Z), 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/FIFGG1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204933b43a0d39917c6c40eaff46f60b606cab8d951cef1d02dce0747f5081e6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIFGG1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b6ae136247f6a1e3bdd94566f09144793d168757d11c887cb85d0093b8ae3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIMBA2300007.
Mäläskän kuoleman polska & Lindbergin polska
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4042c5c6aa217125e9acfe57936f28884ab56028a065b81819c743dfc53f80d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIMBA2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18617c97c84f82873b317ae215053aa9f9ad42cb95021f02f9460604319d37ac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIMBA2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f730ff66579c6f648a764ed3a0bfd4a6506f47df92541a9450fb61cdd76070c. 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/FIMBA2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b6ae136247f6a1e3bdd94566f09144793d168757d11c887cb85d0093b8ae3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FIMBA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b55d9df41d9f8ab237c5076f99963a07cfead88c54ebb6408055bb76e6ffe0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIMBA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62e274dd5bbe769486d7ecee321c07c52f882b925832e6f20489575bcff832. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIMBA2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617ba7f9f7cda27da1dba23be9cb2ac8c3a1ae29433981e1a70107a340a45711. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIMBA2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56460241b57ab52c0465806e543422d1a0d07e3f9b00c3f0e44e2d375c8aa25e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIMBA2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d043ab025849ec4825e3a85720b6968c9bac96b749ea2e16b8b616d0073da74. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DECW62500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a15ff666571cec4aef92ce3efce789daa8f3c2d3533aa9c0fc98f2a2ccdb2e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:17Z), 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/DECW62500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6a610613a7acdaf1f542da36065bd0383f870d9fbf634aba1f333d1c5d4687. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DECW62500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a2a5e773df2f7484bb6f0ef1f60c9a8c7679df65cdcd4e73b027705e2e86d7. 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/US6QR2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad3c73bebc24b1752f3743865a7df6d6c050a582ae3216eb0255f232b46a365. 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/NOLCA1093010.
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