thumb|Rikshospitalet occupies a large area of Gaustad Gaustad is a neighborhood in Nordre Aker borough of Oslo, Norway. It is located between Vinderen and Kringsjå. At Gaustad are The National Hospita
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 0x3d42257da96503f7a1d3a1f5cc4d922784af05df426c642aec953b9c9f28c7fb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c24aba4f-3547-4deb-907d-4356f6fa3b0e.json and https://artists.proofprofile.net/proofs/artist/c24aba4f-3547-4deb-907d-4356f6fa3b0e.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 0x9dd5726c080c3b68d74098584e80200f610bb46bbde5613e4a970663bdd1af9d. 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/TCADJ1789954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72532be893a32ed3344784fe63c346e9ca4ef52473678f8d3a98bbda62b0c3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:32Z), 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/TCADP1864041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb586363c7704d0c7e469ebc41c581e42856ce7a345b09fea09e0c01010ddfe42. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ5FN2125177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b0b05649d941e9d731ccb4a057fa1cce93f1b0a0efa1e41e069e51c47ab4d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLZJ2142845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5189201ff0371e64f763feda772400c7e84ace6292e60c4b78c54a190f556665. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USLZJ2189446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef7c7e3a1a5df383944bcae12f1369042f883dfcfe794e47e9ef4850fd9fb0. 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/GBRKQ2107843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b13986954ad3a4fc49af2543d7f999853afbc093ad700c5b7a9d6dcb0000f2. 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/GBRKQ2111756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cfe4aac75effd15b26fb27e19642361dbcaba9a7761921855efaf6816466d4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBRKQ2111774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f12c835f64f950bf368816af06f4124d59687c3ee1812075052019c16cf87b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USLZJ2294483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fc1726a477484219addcb9fbc00163aaa9e4c627eaf9679d47ef0e9426c219. 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/GBRKQ2229824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf6301a2c7788e2f0e83ea02b92ce9eb4ca47ed886e2c8f2489a1f93085cd5c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBRKQ2234955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f578cc356ab00b0ee63e1d4b07b135adf935f3cff48fbf4416d776f607b38a. 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/GBRKQ2250793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eba8c2751a710edaab1835b6505ea1b9583671b7c445770e39d9e6934e237eb. 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/GBRKQ2262016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35182e7464e1ee8b4f39c36bfbcc6dc2f40ffac342c8fbcfb0038c4ba1529abb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:11:03Z), 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/GBRKQ2261928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93532c984796b4db4cb8304b8db63051b601ba314555addd8638c5219e4fbe99. 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/GBRKQ2261968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796bc450abfa98cde6e95174e1d85f04c44cd98ae0987b5c94999d58b181472. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:17Z), 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/GBRKQ2262901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f12c835f64f950bf368816af06f4124d59687c3ee1812075052019c16cf87b. 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/USLZJ2294483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf6301a2c7788e2f0e83ea02b92ce9eb4ca47ed886e2c8f2489a1f93085cd5c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBRKQ2234955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd76f7c2857f4ce31c49f166c52d79a305b57883144243587bebc75a15efe8. 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/GBRKQ2229838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f578cc356ab00b0ee63e1d4b07b135adf935f3cff48fbf4416d776f607b38a. 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/GBRKQ2250793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db27fb01f5328d308882459004b9dfa7c89748e021a96d3e3691e77b4205773. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:28:20Z), 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/QZTRX2203026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eba8c2751a710edaab1835b6505ea1b9583671b7c445770e39d9e6934e237eb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBRKQ2262016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796bc450abfa98cde6e95174e1d85f04c44cd98ae0987b5c94999d58b181472. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:37Z), 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/GBRKQ2262901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9b0343c0ff68aff950f19e2747901d17fde4cbb6f2d5607d9c30afb3d33340. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:16:28Z), 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/QZ5FN2311488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08ee789313d6e8957695b1a01fac1a4591c3300e9a08bc0be0c1fd33eab3f5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:17Z), 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/QZZEB2319729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a10e4afbd3a151e9f469978add5eced50500a345efde49b5432b804dd86381. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:44Z), 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/GBWUL2434265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b029d49b4e4e6750382b5895b47de17268a85a0115e5489a2818fc68517417f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:16Z), 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/QZTRX2433935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b515e3c220b1f4a923cbb7aa68ad9ea8b4157e7a1021a541b6542290dcbeb3. 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/QZWDD2462439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8104d07ba8f0ebd759de2b09851770b6911003a6fc3af963a4c0ab04f9bd8857. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:19Z), 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/QZWV32419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf3e8ff840a19d04501690edb1607ee4fe128cc32acd0040e4d3dbba8c30e1c. 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/QZWV32490224.