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 0x33f217b2ca2ee7711f8658435721533164a38a0715c78d075fc5a33b80f74516. 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/cd687d4f-37a2-41de-a169-afcd13cb67ed.json and https://artists.proofprofile.net/proofs/artist/cd687d4f-37a2-41de-a169-afcd13cb67ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The PH Factor - Madd Hatta introducing Mista Madd
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 0xdd46fdfdf0dec34bd49e002f619e899bf39dc136e8c179d043e732e39ac704b3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM90415293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69970338b74be200a5f332138abfe7d2a19629777acb8588764ded2ed7caf35. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM90414263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c53905f3690102ba816e27b6ed7d5358de0c16f9cc4af5845319b8c15a812d. 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/USHM90414264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b56ae55e98f51e7d7496f2badb2ee83f1c8404996505179984246dcaa435e. 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/USHM90414265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79ded1f20cfdf308b1573b543ff146000f317fc2fb5fbec58fdcdf176bb569. 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/USHM90414266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bf2ff2d551b52335980e9fd03cf095e415a39e08d49970ed7d183fb13ace95. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USHM90414267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d46fe2c3761ede7f4e3554daed99a20c610fe8958896eb28bc6b0e27858cda. 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/USHM90414268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05434158625606806f60409b05b707ce190f319dba3241389397902164708e1. 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/USHM90414269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38471e7c992c8eebdbc4700c622ea3e03de26ca29826426ec62fd8b76d799f7. 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/USHM90414270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab2559c3b73736bae92874e64c726cd792e798e64677471002dd7a5a923ef07. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM90414271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9ab8a3c2b837158e653dcacf4d6620e5c71c83bf66f0f4dedbd8f573d473a4. 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/USHM90414274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5977fa140108a03bf866c7b0a7d2ab13268120cfaa63af9fcb651fa86dfbc8ba. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM90414275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a19291d90ec030e8c0b9eee9d8acbcdfe413ef37af64e645129dd48296795. 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/USHM90414276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1649ae260bcf913eb49b27b1e916aeed23405afd5d60a1a8b3f41c7aa6401f5d. 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/USHM90414277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e125fc6eaba83d49c1a2269aa18396c41205dea2d9aa2d55b5c2ee6e01f21c8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM90409220.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed94cf96e87223ed5257ced82cb2a3840eb8dbd0190d9ad92bd5c14ea511753. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USA2P0844992.