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 0xe0d2cd5e714886bb9c4b47a610443c79e3e070d659be1363b54ea92da3654dd0. 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/a0a60e26-6775-4c76-b475-e753f8d3bd2a.json and https://artists.proofprofile.net/proofs/artist/a0a60e26-6775-4c76-b475-e753f8d3bd2a.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 0xc9d32ba917e301a6175917c73af8efcb2705dda2991e45d536b33664395f7adf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCACR1626248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2455839cc938296aaa3c7ba830cb065899be2680cc9619f3be59eed3ece16. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCADE1712182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb9852444ff7cd0deb95de060c755f25bc7bc15a2f19dea2a5903049a8687c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F82516707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf66d663226d8e0c66c09bc75a28fe247383a0e6661f1036c7933fc7a87b752. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCADX1806321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47ad9509f768cc3933af51ca380b6733a27b02abec3a1ec9f8aca338307952. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES71828962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47ad9509f768cc3933af51ca380b6733a27b02abec3a1ec9f8aca338307952. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZES71828962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecabc26b094cbd1000e1d0d38cf5c92235a95e8c340a9ec04cbb274533bd58a. 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/QZDA82065433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ba69967c6b85aca0e02289b39ab13e3eefe222a0165f704a8a78af8692bfd9. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHN81900756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc9cbdec01628dbc370ff964d3292e52748ae55c3804d567330e9964681d34. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZWDW2327766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc9cbdec01628dbc370ff964d3292e52748ae55c3804d567330e9964681d34. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWDW2327766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae84e7325cbc40c712d1a9fa503d73fd9f9ddedfd1c2441376417bf4e76e23. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZZ662481205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeb03415407346c0964cae74fae0887ef7a4ac85ad48c29f23d811fee734d2e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTBA2507661.
lucid slumber amongst the petals, leaves and sky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57066f61aa976a13341d9bc6bc6f445a967f9c9a32e33ff12e719182e695a887. 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/QM6XS1900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0119250ef5eaee401f21eb912ed47adae91fa28ca10e6e6eeb725105747444. 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/QZNWP2451198.