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 0x3a555f6276e87f4dad7221560096027c63d6690ea1ecedc6ccbd55e4afcda209. 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/22e9d78b-3568-4640-9f64-98b605e1f5c1.json and https://artists.proofprofile.net/proofs/artist/22e9d78b-3568-4640-9f64-98b605e1f5c1.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 0xcae77cbe85bf35bb9ec6677de913fabbcc50070b42933fbe541b6007352afacb. 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/ZA6FR1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8f08a42ec8cc6baf9084d1eb005dc306f3c474d6560ba1e239a523129abc13. 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/ZAA012100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91350a31886bb00c49ac403b6a544331e8ecb2cdae2ce5ea99bcc6a139ea5a6d. 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/ZAY362200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2550cfa23692eadff2b646323e1c36f16bea316953629d14cdda3656101750d. 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/ZAT542000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f0862b2a66cbc491fc556db162d074f5bf97d6a0649361d6050f249214356b. 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/ZB62R2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b67fb4a5d8fbd76fbc4453c3e57b18ff78d0e85550346523889f0492c35516. 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/DEY472277602.
Push Push (feat. Nomfundo Moh, Leverage, Bobo Jay Nzima, Starr Healer, Thando Zide)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca75b0fa47781e5823002aa19efde7c36a124e5c7402bd5ff86d1847d51e534. 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/ZAZ0B2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62085fec1cf65aa1af9a5dc890afb3dcc82b80fd528bb566a22e709258b5c152. 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/ZAT541700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce905125a034ca1e392492fc8b1053e83d7595ba84b0f22a834e19d538ee40c. 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/ZAT541800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcbe60e80e86b1d433cf1204eb8dbc73eda9a310507b51de2377037bf57553e. 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/ZAT541800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce905125a034ca1e392492fc8b1053e83d7595ba84b0f22a834e19d538ee40c. 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/ZAT541800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcbe60e80e86b1d433cf1204eb8dbc73eda9a310507b51de2377037bf57553e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAT541800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62085fec1cf65aa1af9a5dc890afb3dcc82b80fd528bb566a22e709258b5c152. 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/ZAT541700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc98120319172a6a24f14e26071b425b7990f9d3e0598e52649d6668e2a2460b. 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/ZA56G2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3d0521216773782c92419f3d37bf0d38e6bcece12d157a1556791fe927616. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZA53P2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e575d848d05a7d77b7625cdfc1a888ef4dac4b49b17548532af2a51f513cdd. 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/ZA53P2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7083b142fe96abad7b2c800ddcbb48762f2bfc640e2e4f18091d839de6f2107. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM6N22268482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560644c58d7800ec13c3ee3fddea6f1387fad22d2bdd31ebd39c43c79e62a0a7. 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/ZAQ652101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfbe7aff4ae541ece965da53a141ffb28c98ee1d545365ce8a05fb1859804fd. 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/ZAQ652101290.