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 0x0d1bafca32e483563c6e4c0d73f942ff5cacad9037164498e557596aa4ee4bc8. 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/99741978-6df8-4b80-83fb-999cf9e0cdb5.json and https://artists.proofprofile.net/proofs/artist/99741978-6df8-4b80-83fb-999cf9e0cdb5.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 0x760ad4aa58594137b6381e78c6121ee3c05897c808e3ecbd465ac692bea6f824. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEVLR1809001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab137ef19ef54dc96e99a1f24186b0a938d7a242c6389210aea38b8b01a53d9a. 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/SEWLR2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58cc2a8bbc21ef539a4796ccb1a45281e8a7fc85740f45f9bbe8eded59727f4. 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/SEWLR2007001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed89a9de32c162f3b725448a2da14f1ee500eea358c4d96055a6637a63a13068. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/SEWLR2013901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ab4c246228d32e73c89fccbe842a9df3928ec84512c7a418fb48333875b650. 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/USA2P2402269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc2ecf67e1ab88cb805fedc03caf1118bcef1e9e1ad7fe439063b62e2a5c5ed. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:20:51Z), 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/USA2P2417912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8155f984a48aef1479f0e3ae6cf3490d36ade9809e6702a0a1f66f49ff4cf8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USA2P2505049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f711e3fc1117108f8db53ed90dc5be5bea95660c16d4d865992098bc507561. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:49Z), 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/USA2P2509509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ab4c246228d32e73c89fccbe842a9df3928ec84512c7a418fb48333875b650. 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/USA2P2402269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108bbad84464639ed600290d92cf4dd7f22e270aa0cf63d197ef9e6dfdfe5983. 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/USA2P2528547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8029092d096a97e91e612e60085f367bafb1145859952cbaf24960e1dbeda655. 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/USA2P2536731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4b828a3e10ad7ac093df218db1cedf9092305cebce3df0d6ab065b4918778. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:13Z), 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/USA2P2545068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de21517859bfa2573ea67269efe2caff99828be405d2125fe598bff57c7d41. 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/SEWLR1906401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02d6cd10b16772324903321a781617136ffa8e51a532e183620068314a1fd51. 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/SEWLR1701403.