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 0xda4b604e0e32c8e2aabb08b80f9903c91d105de34eed8143fce314309544c6ca. 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/380f5976-4ab4-4381-a5bc-c194f558e494.json and https://artists.proofprofile.net/proofs/artist/380f5976-4ab4-4381-a5bc-c194f558e494.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 0x25c539b580fd77197320e3146655b7a2fc69dc9eedb6d619d4e9811b66d3fa17. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAB390400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eedab0b71330a57c0b1e7f962421a211139e2f4e8cc52cd33191efcedeb8a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:16Z), 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/CAB390400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b8ed9aa1a5a5484bdd8ed4bf26fe50fed9fcc9426fe654e6009f797480ad5. 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/CAB390400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487f6510772babd4dc249f26a83cf8d24436b53771f6a1f612605fb45fd3a16. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAB390400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1347bc76bca9f5784b5112c83916e799cf3496e49e4b716920ab441ec738cce9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAB390400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf853a6d7f21d452b4549bd1d91c3236322af94b134cb6b68f228aae7d2c49ca1. 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/CAB390400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c6c26a9b5bad1b9b8c405bb20a46b10cd07c86352749c66d1254e812fd356. 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/NLA320420765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9e70dc9155022a6af3573cef346c4a3adb697521faa0ad92488ad0c3f9d3b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NLA320420764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d556d22e6551c587b29a3d818f28993f046ea643f0e8d182e84467952cfbf. 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/NLA320420759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7f242ccb67d89327210c959d9d00b59b7b0dd29e2557a706b0d0c407415591. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:52:28Z), 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/NLA320420766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c6c26a9b5bad1b9b8c405bb20a46b10cd07c86352749c66d1254e812fd356. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:41Z), 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/NLA320420765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9e70dc9155022a6af3573cef346c4a3adb697521faa0ad92488ad0c3f9d3b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NLA320420764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d556d22e6551c587b29a3d818f28993f046ea643f0e8d182e84467952cfbf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA320420759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a4f8a1270b02d82156209f959c0b6490ae24d72b7784001815045edc74b2b. 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/NLA320420756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d25b3302d24d0cce292f30fcf206c43d1c8838bd05b042e18de95dce332f0d0. 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/CAB390800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998adea2ded0cdd759293ce9e0b36a263eec7ba5091aa21ecb112f2d20b14f1f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAB390800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60595a7dcdf44826d6ed1b1f4c580f285873da8e19fa68a8e77f64d3439c22. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CAB390800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f226f159684d2b973afa73265936c67c3139f04cdb8b202bf325989ab0648. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CAB390800236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf009abe1a066823e8fd84b337f54e40fcd44e810291fe6a36f7da3fdd2e1206. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAB390800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884eb32e9c66991574425fe486bc723eecce0f991228158b9e83c661384edeb3. 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/CAB390800238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8962e0b60b637ef2fa17ea79095e64e7a7665201041e8669ef267f1b0f3b5b0. 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/CAB390800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a58048234ccdfe57ebdc5fea9649e9654b32405093cb23a62ad9f5dfdd8363e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAB390800241.