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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc4ae63af3ecad826f1e46c5231012f19171201b03d7d2a38355501e15ce77. 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/f5e8b774-0e0f-49ca-a693-750f8cb9f542.json and https://artists.proofprofile.net/proofs/artist/f5e8b774-0e0f-49ca-a693-750f8cb9f542.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e56666a9baac900151eb5ad939141e5a34320e49a4a0a82fb90e4443ae40fa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US23A1500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f21e12575dd8cae11919c7711788e92f3cee3c96b4e7a02f19c92e4bf749388. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1528712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0c872ed35a617b24f4437609afee24c17161679111c90e11473cb2bf54f055. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:42:28Z), 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/QZRP52213258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f127a70779175a7a188a3bbcde844b644ef3bddd74ba8bc711b2beb9bd9e057. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB42278954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0c872ed35a617b24f4437609afee24c17161679111c90e11473cb2bf54f055. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZRP52213258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4189fdad1f605c54b9aff48d16506ef87eed7f1b3ae03b7a1feabe71d79b84. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6L2390318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd844f5cac39c1f9ef06becc698f5deff3092a9ced0b3b71c2e579ee51af80ca8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:46Z), 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/QZPLR2388677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe389f0d337cd60f24adf2d11b5cf51ad49b0f750fe9743cecd27b0af3e78a84. 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/ZA41S2304591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca4efe078b37fc4e4f8cb71aa6c87ff62fafa957cc858152e05bb74e4ee335e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:57:39Z), 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/ZA40S2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945a32cd21133fea8e6f47d60f59917e15da4932c8d8db50747a06942eee0538. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZA40S2401022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c3113238de1ce421854ee44b06ca55882b4211ea9a01e194030e57ca27311. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:49Z), 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/DEEC33501637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41223ef4201a8a53ea51b5f8af4f779974794f037cd57461dc9edb69822b489e. 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/QZTAT2437181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0be0add58599b6935022d8a5bfa14c5bd19be3644c175d21ecf4f9f47c1c4f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN82423357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26db088456c496415db665b1bf62e65d91eb328469c536044ded80732124c6. 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/QZTAX2310283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5f5db497dee734a85298d1515b7c8e9c975e0498b222adf68201a354150f6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ZA40S2401330.
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 0x1a764c782fbae3d456de0975d8ba204d68f331319c504676a0cc6ae90b80e25e. 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/ZA40S2401332.