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 0x309ee49d050132111ac2ae1da890f7b55029ce4165955c9f334a92976e505459. 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/60b8a61c-927a-4ceb-8209-9cd7b27bbce3.json and https://artists.proofprofile.net/proofs/artist/60b8a61c-927a-4ceb-8209-9cd7b27bbce3.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 0x9d004df7151dda226eae1cb2d122dd449e7d22cec175d24d12a463d610cd9251. 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/QZHN62320858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e25c077b2c880131eb5ee79f409fd908f64068a7848b5d68c3981e3d46c8c8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZES92287078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae0103e8f9c90af74cb4c4938aa282b4b381236df1d583efc5fbb694734e32. 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/TCAFX2100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf247b02295d358d775b5ba2822d5ac6280a8712eea34e253e4ecac42aae40f1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAFS2182248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1743aa22def7db38feaa64e06ba94ec69530adada53a7970aa82078265f61ba5. 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/TCAFK2139569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ede01dee1b6325577ea5190e97db0856d2fe582d9fb6b9d9440612ea5f420. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAFJ2129266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a1018de6fb49fc3bde59d893cf71283556b76545129142f9530ea0975d9f5. 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/TCAFE2070839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b456face8c7175fe7ce42ef84473570e8c2ade2b484ae83ce8a8d77d3973b5. 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/TCAFC2087593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef08b50d09055397c8799bb09206a98a5a8d963317efc6b9275de60c28fdfc3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAES2062900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8bce83ecc15525e4d5ffb2328a84a839f71c9f041e288d13cb7fb2b9667907. 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/TCAEO1980465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7de039181b74056cc9ae307ab5fb41f060de2d1d5b360cbfc8dcbf047774cd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAEM1915383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd488a77b1e1b59b2cbf29207da7cfa5bc3637c62514b66fa14e8c19d73c29c6e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEK1993354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23854599f3afe7bedd55e740381a074a8cbde72e9de4faa4ae72b6a8679e6d8c. 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/TCAEK1904928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc100faccefbb065dac0a40a5e6b39cf01602eae8bd05fcf21cd2c67e52289c97. 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/TCAEI1924415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1829a9b09f5e6e2df8ae331e076d3db6f8659eda7f972bac8777b71f6ddce1. 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/TCAEG1940426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d87fea9a62a529ace4202104287877d02b581264ad35ffe98035112a1b367b. 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/TCAED1904715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd902f239754cbede3f78c770c8f79b6b8fbcd5e427997c9b10279d197c3c33d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCAEC1982799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565dd6053c1ff9f8893f6c3a30a7e60dd1c97cf5d8e2dbe35be0c69e9eaf3ab0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCADZ1854840.