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 0x0d8c7860e70dc84e3936d2eec4c2a3a7cb51d80d75a931fa0fd928439b8c02f4. 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/9b602c19-8c39-4583-8cef-41686e6930d0.json and https://artists.proofprofile.net/proofs/artist/9b602c19-8c39-4583-8cef-41686e6930d0.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 0x7237cf86edc97423d28f765a5c1335359279273a5d5ac3b8c78056a6446a057e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBMJG1001375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985306c8e7049692dbbb37ce0854ac9eb45fb5bf36be6e6cda4ff9352cb8d7a1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:19Z), 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/GBMJG1408539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4927a4144e49b73aec59aa00a6e2fbec1a1fc5e3f6029d20f0e988f20d82b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBC2M1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274e569d93989e38b58492ab628782a321948e40809c9067f0d4e99e19dc9d0. 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/GBC2M1400009.
Sometimes (feat. Stormzy & Tinie Tempah)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba961fbbb74adf318be166f3ec7f5fc0ce73d7b4ecfab29d54021daec4e7641. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMJG1505953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe496c4d6170688a22cbe268eccfa28c46a968503b095583da408192dd2caef2. 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/QZHN82078569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86000cc2bf1e3eec9ad0e3889a2c09aaa72b80fe411a35dba2b8d09bbdc78e1d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/UK8PS1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1593a8898739ed7734ff16ecdcddc18e7683645e001b8ce547ddd06fa076990. 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/GB7TP2000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405c94ba61fc0d9ada172525a391728c2b20c58337eda850b2742abec657240f. 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/GB23J1200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821e46c0f90c3a6a40b5839f19865e8a1b20a702f00a788e5d6b6c290dd69ece. 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/TCAAR1080307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe496c4d6170688a22cbe268eccfa28c46a968503b095583da408192dd2caef2. 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/QZHN82078569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23dcb48fa07fd4cc3d60a9652ad5a5bcdbc2f6a5fa09626c77eed367ca4831e. 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/GB6KF0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfdfb7cb8c9760d7c00bb556c00f4f8b85ff5fe11a4b0ea600bf1428982a79c. 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/GBSXS1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3592f47654ae2591f9c6f403c5144176003022d5c44ce0f239d14ad7071bc4. 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/TCACA1441980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7b005c62ff2202267ea44c0b8c39ad48fb7d962568993927d8e39829557a1e. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/UK6BM1400018.
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