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 0xbba6b87baba2732da683ecbfe2d95b5f966c05a21334b1e7e07cbc0b8b778c62. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fceeda84-0e08-4850-bbe8-e77cccff5bcb.json and https://artists.proofprofile.net/proofs/artist/fceeda84-0e08-4850-bbe8-e77cccff5bcb.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 0x0a3d6a05396b8fea95241dd6cba774912eb081dd8b72164d2976d51957a9f27f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEWM92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad664ad0e8b64004627517aaf64e1722164802c13525f66082d03b547951d5d8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEWM92111974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408822bd0938b2bebbc659dc35414a3fb7e7345a3965493fe8cd5e6c2340d45. 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/DEWM92110230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45ee417cd921c6d1cc320fd53ba2aca589d5c460382477def74db5af67b18f. 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/DEWM92000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2695775eae36f1aa7f2be44ac4e3cfdbad9d523d6e8ec287d992eda12b01c6. 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/DEWM92000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43467cf900768b16df10186fd3d00e644edd03216110a287c9669714fa03e7af. 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/DEN062002749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d155bfd49b021c3506a6f5b0d13b15c67b4f4f1a2c98378c95b35e97690bde8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN061701006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c76fa72719443931517848c19bb2aa191c67f96ef50da337421422084fe98. 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/DEN062004513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd788e1bb12f5d1759f983306f0d89dfe0054008096f597d167df74b9c559891. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN062004514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3d0da65a0f1990bcc5f6352b454fa9068d6a2d21d2e1c47e837be21fad3a23. 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/DEWM92000002.
Kontor Sports - Nonstop Powermix, 2021.01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c55f074fb4a107809b0be614bc921c779530adb6e27d2752e534ae58b640fe. 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/DEN062100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb11df2a75ecd59a45d850f3753d8d4689ce7b2bb446b5480b5fcdf5614c2f1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN062100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5750346a1241fa210de5b74586b2f4a511a226c82801fa008fece489ae51d7d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEN062100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc4e251f9547b4ae894510f69a02e7b6bb335fdf750bd5d309bf1ebfe32a92. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN062100014.
Kontor Sports - Nonstop Powermix, 2021.07
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3ee3f43dbc40c0cb1beaa3787188cbdade646d7bbedff5e1d6563eb1e5996. 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/DEN062100922.