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 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 0x899e845ad9bb194c48e1c90d51bfd3a254bb3cd4ad1f09d7e07c8d1510685bff. 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/a21c44c0-c905-419d-90a9-966d41b07576.json and https://artists.proofprofile.net/proofs/artist/a21c44c0-c905-419d-90a9-966d41b07576.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What You Won't Do For Love (feat. Lin Roundtree)
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 0x32d3bc0689244db868f3a8494a424e0e32d54668a44af643cb67c23ab7667ede. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USBP91300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26740145b6f576fb44639aa5b8d9ab6e973f0a7d4d7754f8f878e526ddbf877. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBP92100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec0b1e1b8b55e7c410ed99e70b84041b717a4d97fcd3b716f9b2ac4603e72f8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USBP91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6b6331bdbeba3d191f99ffc12246148e7b8d36817426336535d8868c8e65e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBP92000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd040902959044e4fbd5f75274fed450c6921aa0df146e7be094a8a380fd4c583. 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/USBP91900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b9b87f6abc69e978e693911e4410092d292372206daa68afdce60f0d88b34. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USBP92100002.
Sunny Dayz for Catherine (feat. Kay-Ta Matsuno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e84cee3ba684f95038840962240d79f5fd716dd4d3ffc0a562fbcce9227416. 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/USBP92100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3237f9342068cc5e1fa63b5a2ec10311f48687950414707fb5d29ab8f12684b7. 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/USBP92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618bff2a43c506640462e1f57a4550cfd369c9dbf6327fd2844cc5caf3810c4f. 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/USBP92000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb7102a95d010f5fffabfcc2b22c0a84a2747b99a6243885a72ba68277ef543. 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/USBP92100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38476ad6bd2cb184b423008947fbde595472c53cc394f6f731c88450de6952aa. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USBP92100001.
Brazzetude (feat. Johnny Britt & Rob Zinn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1376dec6668834366f50f5e6a0ff856056891838710b439b9d3e302c6881a82c. 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/USBP92000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26740145b6f576fb44639aa5b8d9ab6e973f0a7d4d7754f8f878e526ddbf877. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USBP92100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9da4cd49b466eba0d240ce4a1d7a8333490375bbd662d6c207a89ee9f2fde3. 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/USBP92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e778e5521ada50939e9c0fcd4d4b8f6389f6eda3194286c9b598f908b1f0a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NLHR52189586.
All for You (feat. Walter Beasley) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7c3ec488739060334da6b1dce07548a5e4408ac63ec6f9853a7a60893653fa. 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/USCGJ2003368.