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 0x973526d2f77a5a1a987762a68d30b61fcf47c511daa547305ed87c7de1cffaa0. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c506990-f685-4998-af97-f435c15350c7.json and https://artists.proofprofile.net/proofs/artist/5c506990-f685-4998-af97-f435c15350c7.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 0x900633ae1b973783ec2932a3a0cb0cab9c18df093d5da23a85ce57609b8f3f10. 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/GX3Q92052942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa261717378dbdeb009f722b726781ccab016b77bf025e730fb35cfdfd9c66c22. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GX3Q92052895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91306f9f39238b00db89332b04989d1a4b7b723cd30f5a0e80240861e602f24c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GX3Q92052897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21308e22cf769c223ebf1aeda6425a79cbf80a8c2b6b445c8c54f8b1f50722db. 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/GX3Q92052903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf871b971e9dbdc24eac15faabf34d5294aaaab0e9257ad6e2405d4362ed39386. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GX3Q92052918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94519a1c4368821b7c78b57be715cb8dd826a4c7205217dcd873ab4df9118279. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GX3Q92052921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e0333dd85557ceae6368b8f882ba99102cdf7c8c8c9fa1f17d426a3c93fa9. 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/GX3Q92052923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c602d02fdb1845789b34bd27e8fd301aa926773de0d24e5f865049f72e2c5. 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/GX3Q92052926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295caad63cd051fafd7fd26f425119ee0f7da554c9f03f6882885b3d53d43b97. 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/GX3Q92052932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e5bc24afd2f256077ffdb8716a5b08395a612514fd4ccdbb404ac09d4a8795. 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/GX3Q92052935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8059c42aa2aa952ce7dac5f1477e0907fcaefb914137bd14395b48261a8abc14. 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/GX3Q92052938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b5d30376ec957b31d4c61e59b96680a5cf2012f5bb4df189d9dad53171c1c6. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GX3Q92052940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aff3f832dad70c472c81acc2e790d01b0e9ca22b31227fbf1b0fa707bb8329. 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/GX3Q92052721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99bd36649c16a2f835bd9c17d1e983e24b38c231bf4ef637230f8ddaf44f76. 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/GX3Q92052726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920893e5c10b405b598b4dea12c3db77c6d76cee4d7fe91c6e1dc22dc5c25c6. 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/GX3Q92052728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9fa74ea6c9ef6c5ec05a8fd4cbeeebc63cc70bc3d0e0714ef80003f9b5922f. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GX3Q92052756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b320ab3dcff99243d4ff8c5ca2ac38c43e1dea8ec9a126e74320b4bc67862. 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/GX3Q92052798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e21e232a9bdafe23f59eb801ba37c60c34ffa24eaa8083cfd93bec82a79e383. 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/GX3Q92052823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864335ca606719a4abf7ee940ab82c2477f2e319495848ed31eab767f65a4ade. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GX3Q92052838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76010b303b9e8af06301eeaa8276cf13b04b1d2883c02f7a9c85938551bace16. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GX3Q92052835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2454282c3a8e3c3ddaf420a43e9173786bd7241ce761854286ded25c468b930. 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/GX3Q92052836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00510f5228843da71f6289f8093def6894c95540a2e29fcde44d8a98136e85bb. 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/GX3Q92052839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df56e81a736907e13cd00cc4d1464d55f14aed92904f00a20816fa7d3cb4b5d. 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/GX3Q92052841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779c2611389c5c3d742fb2fd0277ef71220ebbce8910bba1b70f8cd3ac2c6ca. 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/GX3Q92052842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62965fe5fe8a413e527e2f7f77901f6dda4980691933e8458f4799194dc6836f. 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/GX3Q92128800.