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 0xb3086ba2c485141217bfb743a5642ccffea9e350e87400716b9ad282fdb1e2e0. 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/f661b079-b054-4e17-98e0-378ea3e848b4.json and https://artists.proofprofile.net/proofs/artist/f661b079-b054-4e17-98e0-378ea3e848b4.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 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 0xf6362672411c0edc6beeb06f491186b25fa0abcb8f28556329732359c5305662. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVKM1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233f9e75cbaa75f094d5abf2371c97151722dedf88eb05d065f80137faf965e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USVKM1300002.
Bridgetown to Beantown (feat. Jeff Lorber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc19422267f272f7135a8e9019d91c9108547f1207de4790a42addddbf38b9. 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/USVKM1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53364a92fcbc64ff2e3fedbfcada401f49d32e090c169c046e28ee5e8d061ac2. 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/USVKM1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19820578d9cce0465f6622ccf15ea0b0a68886b92ec2458942aca18284de53. 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/USVKM1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bc19a7acfd1deef92b17ad8f7e33e9326ff1cf198b2a09dc95fef4aba64042. 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/USVKM1300006.
Funkalypso (feat. Terri Lyne Carrington and Lin Rountree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0958b316ab06a33c8d8c16f9b7221ebe5f97f0f56755b58ffd3820f12f7b0db. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USVKM1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473601895ba16e1d00b467357a778fcd2d3f4a9783edf0cb5f388ec3f72023f2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USVKM1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80623233c867d9c87215f999fdb8f73389ae04147201f565f5c77e41218ff648. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USVKM1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d5fee6cef39b0dab29f1fe345450c9075651986aca97d38bd7dcfb9536cb6. 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/USVKM1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4192b8c9ff3aadba76dfd12fdec889e43af564d25d57e7a09865eb9f15b5174d. 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/TCADQ1815278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca94cb88cb6ab5bd00da6b2c4ebb385f5b56f96da2403fe2f5b61b85e11c668c. 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/TCADR1860795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fb9d3ff437a7c0883062b06df5833d21e05edae8c7fbf59a6a2abebf110aa8. 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/USVKM2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f54a9e728f355605ed21db3985ba0a9e5c3d82d6d0ac0e4a26a6ffe7945bf3e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USME31303469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471ed67c75cba7ca47c7cc8534be297caeb4b4940b3c9e0adf66d39eadf1c227. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM6P41426662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ccc2380f92eeabd3e40abb563e1ee3be52f47985878fcc88467bdf019f9306. 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/QM6P41428557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50259978f9aa479be419b3943fcf381234e7a454ef92a40de467b388f932d4. 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/TCABN1382004.