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 0x92dc415bc35f9cd3604fa5ff5cfd5390877f95c3cd058bc1b5ca60f56cee0369. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3a22fde-f34f-43de-892c-5633267ea6d3.json and https://artists.proofprofile.net/proofs/artist/c3a22fde-f34f-43de-892c-5633267ea6d3.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 0x406baa94f202f00b94066ec8a287dda7e6e8cd930933fad6bb03307b650df963. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:53:36Z), 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/QZNWX2329281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f2cad059bc2a3239ef6af6c39c51a9f7a4579addf4552cd94094b78755a189. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:51:58Z), 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/QZTAX2309891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640f05fd7088c6e7b25fe275b32294e0d66b8ef55349d455a231ad1b5985062. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBD2398124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7434fa19660fa04b84605b052bf38b0ad1a7fe3b70651c2a235d4abb793faa9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:29Z), 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/USLZJ2571627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c35e4121e98cd0a7c221420612dfbf76872cfcdc1f069ba1d245fd5e215d2. 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/QZNWR2537953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09b75e22639ea3ca5727809b8cc60dac8942855949d9e722d39809c06d08bb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWR2537954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecedd66f2ffeda7bbe305cf17d2986b79731851449e58cbcf1e24a936e787a0. 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/QZNWR2537955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1e21ec46eeb192edda6ef1573b117d0e610331b492edd6509d85eb09735bf7. 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/QZNWR2537959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8ec414a0efa1455c516e790da1f91a56657735fa058779b2068bf60492c9e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWR2537960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7c296e91c7be64c7112f76ddc243f5f5548323f228ab83fd38f64b754e99b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2537961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752189f4c27f9eedfaa9937d318517462f7330d1a915ba2537b368021bb43e2c. 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/QZLPZ2300024.
I Don’t Trust You! (Ft. Doechii & Junii)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da619cf3186227c8cda9730f86b142af4f1094ba9b6f3c9bb48dad4f022aadf. 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/QZLPZ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a17105d40deb7a08989c19e9f6980eacb63c4d91630e110fbd5a884217520. 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/QZLPZ2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0addbde2af4c7d1dc5bc1c35e097ee21ad577e02019297ab6ec0bc40d938d. 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/QMEZE1949027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09399a4d8c35041352e903eaed1f0fcf2c79abb660317aa4bd32ef0f05ecc123. 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/QZK6N2055188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a91f60429901e84bb486cf20437e66149805bc0f3b20395127f1f888bbbab. 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/QZTBE2446537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc2ceb87f0ebaa104fe08533b2690e9bca3c7dfa09040a86740e804538e3729. 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/QZTAZ2463180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ee5032d7ebfb929213af898cc758bae4c34c3ed1316bc70a3c9db752d3704. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM7282568044.
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