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 0x6e4817bd0ff7e124a59bde74bb935dba666c63c45e77d5a04001f9b12dad52b0. 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/d38e9fd6-898c-4116-95e4-684e57fa59d7.json and https://artists.proofprofile.net/proofs/artist/d38e9fd6-898c-4116-95e4-684e57fa59d7.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 0xc79730b6dc9dcc312715ee441c698e525826cd0dce7eb11857a8875d0a83252d. 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/BCMHM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b7ce9c5cc3e7ba9b1595130ac720b3f79fbb9cfefde112f023c089537076c. 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/BCMHM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3a3e6fcd139be4b20d8448d0364c2c6ae1d6398d644465aca6a115011a0cf0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCMHM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4984efe7e929d08a99973c55579c1851029bf9d2392d5cbb9f1f53478f790ddd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCMHM2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe668188136e6d8fe7eaeb05f77c4520faa77a9ab55195a92a171fe297a6f49db. 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/BCMHM2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94aca82ae0475d36f4205a9378c0151589d9e8fc216956f87a5ee4a11bd3fb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCMHM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8fcc837b7810b9b7539786346ea1d3f71e8fa198084b021e491424ef4bcbd. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:08:53Z), 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/BCMHM2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafb06384c84f3e7c2da1dc11edba7bd2f90308a96f98b2999ca2ad3c264d082. 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/BCMHM2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab2373b2c6733cb6c8029a3e1218fccb2517093e930499f123944ac8c67d70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCMHM2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da249b8742757c3aa825b2f3789762ba4b77ade6dba033cb1566503dd57553e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:36Z), 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/BCMHM2300010.
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 0x45137827078373913973a212d3e9907bce7ab37693bb071600c4038c729175ae. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BCMHM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917e0d83e372d89d16bfa040a21ab45d95b37b746938a94fd11f4fe163b45feb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:35Z), 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/BCMHM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3317c667e3739c8304fab97946ee5317786844fa7d6a0ec8494f64ccd03ee59. 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/BCMUI2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8cf93ee3b857ccbef8992f52847bc8bc94ad4ffaca4a05ea88074cc7c9818e. 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/QZGLS1931680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d044586c93d7c4685709c902d85953a12a6d5b30088ce40efe9a5734f9d0c6. 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/US7VG2001280.