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 0xc5e16a58102b03d7d560306c55a21048509b068efcef1eedc306f35e599a2c6d. 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/8a201052-d4a1-41f1-90eb-6b5ebc1381da.json and https://artists.proofprofile.net/proofs/artist/8a201052-d4a1-41f1-90eb-6b5ebc1381da.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 0x107e963b4790f4c03521bd02bf49fa56b70c0681bdff329e884cbdd46ea0dd2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIEY91000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777b16268353d85e0891390a500ee88f36f590211f0d396f6c46525097171db3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FIEY91000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8040432226aff64f3c87efe53d2e841f50818602bf6a741985e56630f9426. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIEY91000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe454728f560dda34f1925bb85adf22b160fce9305bb2b8badab89113e9973afd. 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/FIEY91000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40169d8854c1182dced45bfdacf0dd6223de99939eb0f2c0c46090561ba48e88. 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/FIEY91000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c2379fd4c4af5a529c02540e4b3774b282328164c20301ebd2d914020e24e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIEY91000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf9077d9b599c56b61fb1fd358dc13b0198c2e815df81c72aee653be985823d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FIEY91000002.
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 0x5f4ff56dcaa4ec3a15ceba9fd760f71b9535cfcbd60e9741930a9dfc04c949e2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FIEY91000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89791dbb8d866f301d889af2281cbf978bf8ef77a39572cb70c4f2043e475ef0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FIEY91000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0037cd7136eda916a6d8dc4b08598d39f9e6e2e7e00b1cf9fc87312bb57440ad. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FIEY91000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad96618afbe1893e2b13a291a6def455181c9c3d625bc0c604550eca5ef967b. 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/FIUM70800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4878b578e1e3cd7af8d46b562e84616685bb4d41022bc2b590545c63ef5162c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIUM70800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970f25b78a8903f52d815cddea046c076cc164805dd58ac477eab22e6fe8f08. 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/FIUM70800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08131f8ed833eb017ea28119c68be36b50e935c4ed5ba6a4268fef9d0f75fe48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIUM70800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d35a728a3fa5b6292a0fa5e940651813e6915f938b3dd56c3304480bf66dee3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIUM70800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88d8e0f8e386bf78d983e0a17fbf6fadbfb24d0ab834648c2288f628cb90b79. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FIUM70800370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c769c777244cad3bebb1c21dd80a8e961b8aebc75bc1ae7a3d3928bfd45f6e7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FIUM70800372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe838062bdf1452d0b5e755aacfacc114e0941421b45939af32f54c93e7eedc9c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FIUM70800373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b8ab9d8626d5f046a383e811c46b0b34fc27fb479f6da56438aec806c141ec. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FIUM70800376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff2d5cc1098862bd9a181f4752d2c1f00bfbf86e56c1adc584c154b1324028. 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/FISFS0500409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e28e033d59f3239d86e8485f83aa7c3af5873150b665f481cc07b415ce84f8e. 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/FISFS0500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a66e668733ce472ed4405878a73ecc07041110f982c2957b517b9cf7306e81. 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/FISFS0500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b180ceedb9566e3542c603ce9004b83458595e6faf2512fbc544380627e81. 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/FISFS0500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b18cabc84a3d330c9144e6002e321535171468fc40a9547a6542fb0f8d7a11. 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/FISFS0500413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc10841b2e9301049c37b49fb151b6bc63c313a1c79b7cca0cb2c9bc333cfe7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FISFS0500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eb3ba40dee21ba4f8bdef67af6cc424258bd6b755a12712d415b53a52ac99c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FISFS0500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda8f25a1b8248392010bf81f297d9425f1d27539485dc7022d0315edd4e9a5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FISFS0500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce732540e14599318e39d5bbf23929c828220a8ddbf1296eaa111d7395f25177. 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/FISFS0500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5908cf01254f2a206f3e1c91cad7fb787527519b4950145afe9301c2b80c3452. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FISFS0500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78994f21054138d2a7d39a52e0dd37bd0e5956778b53a427a44ffde6f111e054. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FISFS0500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c38bdc53357263fa91703afe738188dc61547cb641cb089019bb90b3a25620c. 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/FIEY92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674eee67f0415b6b39026891a655f462b0812fc9058c9fcdf394588a71c735c2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FIEY92500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482d927b67c909f4b4970ecd66c90067b289a8d8e1f03f59a4bc8885f612748b. 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/FIEY92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89beda2310abefc0a1f363e4462a97cdc52cbfeb822d1f31ed23d837faa84ad6. 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/FIEY92500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e95705f2edde3d7421e1be7fcac8c1a499330e9450b6ae0da07af5cc789bed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIEY91800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888497f72145599e3c73c139d80358df850d3bd52a5186ee836621d2ca31674. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/FIEY91100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bbf7096fa5f2f1735b6108912162904f001ff4985084f9552a24aafbb9983c. 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/FIEY91100002.