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 0xbc75f8a29bdcbe9418c49ad907f0dff3410a21e62875629946b5abc52ca160a2. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5207379-28b5-4019-893c-9209c945987d.json and https://artists.proofprofile.net/proofs/artist/d5207379-28b5-4019-893c-9209c945987d.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 0xd4f033edbff7a789e6aad93ec083c4b5bb3e5e9b21b4ccb21a6a9f8b3652b265. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:08:54Z), 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/ES75E2414680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f0d26a29ab5bfd6c11945682085ad138d0e7e501fab516def1fabab2ee0bf. 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/ES75E2415025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3862c270f02f10d46ade9dd8e4cfd9a1452cf840852b5e49dc463df9f52b0bb9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:04Z), 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/ES75E2500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a48555e4061e928addcb646d0792ef045950f8acb94629e6e55da14b37eb74. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ES75E2500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a607d54ba92a42f97578b10c18e9b39c4fb06f9cd06fbf20a996fc2746f6f9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:42Z), 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/ES75E2506226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde646599e9e87b8ad74243cb5cd56fbf701de507efc2790e4b26c94830135ac. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/ES75E2506480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32288e5ba66cd7bb36074549ca1fd871495d15e69a21641b50411d853a32020. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ES75E2504103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae16e3e36e114ffbbb1ff1479c1a35b98b8c953db6c593efc84bc38625f07a1d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES75E2511251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7202908b533d6161a5c56d3e579c1d2121ba7a925a41ad24dee7acb46d2631. 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/ES75E2510430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf5d8f03c0ccd0b726c302da2fa52972a8c335761833fdffb67d3e99899fa2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES75E2511737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58d2b35abd95668ecb3242d830b5d297c4475ee4a417f7846443b3eb7b8fe8. 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/ES75E2510428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be5d514c3d3c3d12ba4afa4c64ca0e8cb2d64fbb95e0975b511cc6b5d14c5e0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES75E2511769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403de40c1ce7c8858ee572df2ede6e013d77d2cc13d64e604654dd8eafa38b34. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES75E2510619.