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 0x5f8d7c23455f7b5d2e9b0cfbfd4001320ffa4a08eee5ca1e6b30bd8a06370904. 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/efca265d-fcf7-4489-bd23-ee6755ff5c28.json and https://artists.proofprofile.net/proofs/artist/efca265d-fcf7-4489-bd23-ee6755ff5c28.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 0x62e8e04082d437cb79924631ed39395487e5c5edbe0d11a65939b13be92a95b7. 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/KRA382001349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c043d66b3d4de81c266b8e869b9986a071a0a8851a1566560650e9949f6c175. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:42:44Z), 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/KRA382005335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9da0af2ac718985c8498a9c0c83d2bb75c962a39722279b66943db9ec380e03. 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/KRA382005337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e8a6525dd5a2467786866cefd309a91845d13e3e0cf7e6a3deec02a1937797. 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/KRA382001160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f02754e16b34a4a9f7d73a47d02395fe41935cf9531267a0735c55386f5dc. 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/KRA382005345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef35b2f289d053b0078742dffa3a2d980b843fd2457beea3681f47f52cf651. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/KRA382002078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6c947a6505d3e9cfa1022ef73d95397c4bd906f7f165877e223316c8bee56. 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/KRA252001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d7e95cbffa89202a87c369b6e3509cd32108377543773790d0e10a2249992. 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/KRA252001410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e87f23bd28475e9149376e095257c7067efddd1adcf7063cbc0d43596d4900. 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/KRA252001417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114fe6135cff36470b4a26895d3108b952e6028ff7d20beec43c97a791b4b8a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/KRA252001408.
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 0x69ec8c221682800805c4e08329d47c7b5d38fc8610fb74d5cae17b19422c5c4d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/KRA252001409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3047c8c8b729290c5d65453f19ecb5ea4615f2f202052f94ffb1081ed333a8e8. 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/KRA252001412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b925c896093316acccf4a690c4c378a072b0656bc13dba861bb88970fc887c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRA252001413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9297643ba200daba41b60fa2d13560a3def537172ca93b5d88df00faeca2baa. 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/KRA252001414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718a1c61e1e975f770f4a795f83c75badf4f27c4826052a323274d472fe6a07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRA252001415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5135ec7fad230c8cd23c65b056a4363a3984890a6e817ec420fd4ba2c23fdc37. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/KRA252001418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05725f3b0cc5193c86cc6d9e40458866aa10a54ebbc7f2ba7e6b28f7577ca6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:56Z), 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/KRA382205811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f55a70a52929fe416f4a6ae0e43740bf47039860afcb6889818aee2624c3ff. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/KRA382206405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2659523118f4f20cb7e3a5e2192401cbc7b2f4e379e2700aa831e47c5e644cc7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/KRA382206406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54638fd639d954aff60d92bd0a9e4182618feb79e14c5622be16f8c27b96531a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/KRA382206409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf7ab858def265f6246d1caf3d73fdf21554d16b6019e96429fc53f1a732d76. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:02Z), 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/KRA382402096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405c30eb8294290dd4c7dca67d94ec7cd9c1b1a56d216067ac8ad234f87ac6ad. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KRA382402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6111dff369b35451d02d230fac148d4831c839c758adcdc429f85747f7881d. 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/KRA382402486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b0b2668215bb1eb2beee21660e7e0ae241f38a858e96cdcc775f6f7c77f97c. 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/KRA382000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ed456ada5f31c5841304ccbb3b7e9d1e6ec0dd941fda7543d9790487b021a1. 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/KRA382003125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16a4ac560a663f02075a3369b9376fed0177ac23e3e36677aaab7d9417d0906. 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/KRA382003126.