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 0x82505e90f1036bb10b5a1a86ab3df9edec27e28bbc947635ccc6f43ccd5fa337. 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/a5ee98e0-2705-4f0f-9953-e657bbc1a48e.json and https://artists.proofprofile.net/proofs/artist/a5ee98e0-2705-4f0f-9953-e657bbc1a48e.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 0xa6bc4ad5918dd1dc99134e423a5c880480d79b781d793607131c22975bd1ddd1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZ9JZ1742461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ad9fb1961f4f954c10e7ec4721923e94862758b13d57a54e0dc8edc23a8ac2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:08Z), 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/QZ9Y21760169.
I'm Feeling Sad So I Made a Sad Song (Teaganbear Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02b64bf60e5d885e943c173c6db6346e12e2aa9a97b6b876d9d8dd5cfd1456. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZDA41823677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af98c2aebe29a2805fdb3b0e2fed35021ed2c5500eb4eafc477a5827f1445f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA81820807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17042cfa1cc043478838f330b3aa537b76e25bdfdad0efb25066f830b860ce6b. 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/QZ8LD1982608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dbb96f5402abdf171bf7f33a3cd0bb4c3fc51433eeea1aa6e894673ed6acaf. 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/QZFZ31905732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2d9dea6bc011e51745cd21328979d16ac2df84555bb32d21bbfe0569e53eb8. 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/QZFZ31905733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70a9e9d3f9354362e1ce29d52eb29099278302c240db80db75d40846639586. 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/QZDA61903565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2618d73be858cba71ca45f698d1aa8adefc2140409e09714ab2df468536777bf. 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/QZFZ31905734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23450a2a8c9e6ee48fa348f6d6730673c0e868202727ee1439c9d219d8243c9. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/NL1LE2303357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62418370cf9e3c33b011e33e61e6cdeea04520e99cfe8c048e00c154ec0a6506. 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/QZNWQ2045310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b593d20a889e21f3644523a4dbe4eb87c2ae3a53875b0faa52981b6893ee64. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6G2062634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ad39afaccd56f5e05a32d41f7e6e49563310ad7c7ce1109966de5afc3adb5. 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/NLRD51632917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23c6f1e52dda817bd95071bfd6b52f50d3836e7e594f2b1a97bec27d61f2988. 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/QZMER2169653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e58fe51441520290574a43da5bac0e925c917b45abfc064100add389f968a4. 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/QZFZ72154909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf808686e97757c2bcf8a7c56acc675bef567726a4938354a8c8168b498b0b35a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEN2068640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62418370cf9e3c33b011e33e61e6cdeea04520e99cfe8c048e00c154ec0a6506. 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/QZNWQ2045310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e667fa964f9bb7f523652f07a0e7a180119138a05379f842475cba2d589af13. 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/QZHN32282087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed916cf34099ff6f4e1f33efb233d22e5ca4f889d68ae4102b9ccd5fc9b335c1. 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/QZK6P2064663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36e781849d30d50aa9cdcb29b44bb95e7628918bbedabe885983092a8038cd1. 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/QZFYZ2399273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70a9e9d3f9354362e1ce29d52eb29099278302c240db80db75d40846639586. 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/QZDA61903565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624ded1a9b529f0d0fd444b357eb540be244b4ccd345080cfde59fcbcbb04f7. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWV2032566.
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