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 0x05cc52f5dc5a0ad6cbb4142c867f29027d16832006207d97a2d585fabee64cf8. 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/7e35ab40-ad28-4e15-8f10-32ecc6b23ce0.json and https://artists.proofprofile.net/proofs/artist/7e35ab40-ad28-4e15-8f10-32ecc6b23ce0.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 0x342959f638e626f30be2fce156dfbecdf52a096468d14e595481b9dd3f10c897. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLV61639763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faf30e63a6479fb16e87d72567a5e39fe8581555b973b97175dc5db8bfba66f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DESR41800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209df1f581d81653a26c1ee92d60388d5992af41259efcdb0178f890ac31248. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEQ201901888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdca125c1b653d6233740d62a689071f4fb7a5cdd1631c932e6ecf8df073c5c. 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/DESR41900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772c1a9357db55145a27a31aaf7629ab38806098528b6da399e0b63a3368c169. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DESR41900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eceed7cbf081ff4ea32194c73c83642148160bc01f886b780fb9d35725a3eb8. 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/DESR41900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf3891efb9fd230747dd378ad71566cbd34a0bd2f337701bcba2722c8c2fde3. 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/DESR42000429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc74b10d16b1ff74d1a92f4fb69a6be9266798196e6bbfa94531a51db7de06c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:00Z), 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/DESR42100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd252d9b1fc0032991ba2856014a64b9b55a6893178a5ea1a20292386129045fe. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEG932203453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fb13b5e36e43dc42e3bf4483bc9340b5561e4706073fcf5283c10f8b7dbb43. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DESR42100538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb564bea22e9e438f9436058d809b97a461dd3f42bf3b64ce5ff59dfa6bc0dbe0. 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/NLCK42226394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a43f7b5c3fdd502d3f2b9f5395165c23ee1275e7e132f52d2b03eb30b411de. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:26Z), 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/DEY472479723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b95064425980855ed9f7b336b0363e32ca3f744acdf4733a81369e9da82c891. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBLV62418962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1300c9181e3eff6b7c4a0d6e2f04a51feff3790aa52f1b62683d373718dc9e48. 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/GBLV62418963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143118bb0342326ef17829143edfdd74dbe6f373e03459dd927459c9be9e7511. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBKQU2557640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8551c3f64a453f7fa67e1b5bc37868616b41572f507ae5db25081cd07c54a287. 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/GBKQU2557641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a60ceaaa8910afe09e4b3a34d2e256b126c47f36c623f4b4ca376e75e8396. 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/DESR42000394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea3014e5f43d263319ad4ca13ce3c6e1388513f499a1c53ba66f17a18b3bfa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEXH1900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752088bc30f19f6f8f7c9ad2985e0380811022fe4be946b7a1ad99de009c3a82. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBEXH1900503.
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