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 0xf5a5f71c8d28bf301bf18a77fe5558b4b97ebacda8d9faba64b3a7b8e17039a3. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18f66175-29b5-4a95-962d-9d34f742ae22.json and https://artists.proofprofile.net/proofs/artist/18f66175-29b5-4a95-962d-9d34f742ae22.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 0x13b7632be4ee6b39ce086999678e7584968194da86c6430f5a204a6db6169a50. 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/DEYF12000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa137cf5babc6c5ea024809a26a3f046e07bfc9155f837e49b9624aa262a1906. 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/DEYF12000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d49785641003fa0e6de632671c9465d709c52381049fb7ed410844d08608ad. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEXZ61900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaac4283c3a1e43348031e9a46e923d4b23af0eb9d081e30c588156bf5d9f20. 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/QMFME2106327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa334abe49fbacdb292761352f57266693272a181a1cefc22b2cecf8192ff4a1a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEVF11900784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f36551512eefb3d8dec778f023550626d776ebfbf128361cc38478ed91038. 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/ATFS62101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93842a0385c7c3fbd35e68a8f755bc1ef459c2ad0aad1c6d9f02a3c697839cac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DELJ81942018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad7d6dbb7ab67c0c3e83348e78d1fd59318fe6557f4db63a3c98ac0291a8a1a. 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/USA2B1902506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0decbc655e95fcef641aba5975c08edc3b2457d924a99854113bb6bccb23a495. 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/USA2B2100560.
Bridging Gaps: Portraits of Rising Female Artists [UK Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6617cff5f12b6805214a4c4e74be203406db7e005ad5d57394429b25b20ff474. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEVF11900836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f123c79837a60c965dd644eadfab9ffc5e44a181ad12c60de64e0dd68bc60. 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/SE6SA2015974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbccafbf3c6319b2b9b34b193aac6625d1675f7ba398e30fbb0df5f253b851a. 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/TCAHD2304311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d65350f6669759c7c45c89244bfecb97c26decaaca1fa8da40b8fc7ec78051b. 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/FR9Z61900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5769d08a11999f47026660539ae41ada0be2b2d6f9cf17a63e3d680bb14e1dac. 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/US23A1545996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a34f96a3d7cbbce6f57cf740dde532c7195a195980b90f9f3ff82265627f6. 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/TCAFQ2143721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489d107ba66d4e54b0ce1739098d00e894091e666e4470e64aad26678ab08cdf. 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/QMPKX1834937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6720addb446cd0365c49d499987f0a8802f62eea433e35739c6bbe3b6f07022. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM24S2010200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b30ada65fda5a1964e9d18b5f2aeabd91bcbe32d91ed51860a10aaa6ba6af. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKPL1777600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc880a08e2a68202c3aeb61dda7444b440f4dacd9c61d6bee4fb63929769dd0. 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/GBPVV2204601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849663246a95ba908881ddc5d1b9e0cbadb8702ecdc53ac90d4df3d9c64a24b3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX762254448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3cf98789c9beb0a2df6bf9d3e60aa9ae12bd06e52162b9ebb87dea29b85cdf. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEVF11900826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e263fb032451e2e117dcfcf0994bad44d0b2105e6e08a20033741bd6bcbab98. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UK9AV2101361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c67dcc6c2a3ba6202734f71ffc947339d9a7ad2e071b0d45bb79f3aba2098a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SEYOK1666416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1fcfbbe54b45889781ee8379822b688b2e1d08101bed7897ece7f55e6bc1a. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/FR9W11617855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c8da2d1e89fabaf22f8e020cf3a12d84144a94351716cffaf3a0a02a99207d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6P42041869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb1f2f7e840c6f3e6256d95519ec3bc844b334f8c321794e64b61babb7ac7c. 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/QZJRB1951235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2893f5472b0dbc4a31933b0aee150e3e2a6f53c0e38702f1bdd051bd9180bbf0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEVF11800389.