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 0x0c18bb8474da15e8ad75fca933d1ac4e1a9df241817ceea5d84ebd4ec043dfb0. 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/1cb11a4b-0e84-4b06-92de-be91e3207009.json and https://artists.proofprofile.net/proofs/artist/1cb11a4b-0e84-4b06-92de-be91e3207009.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 0x5ad289795ba3cf7cd5caf3f421654e075ecd4ef345b5404f6bc4edaa47378bde. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA61907878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5f4fa9cab830bca6b4ecdb81a05c67b9e4dca30eff895c9bd8b937ba7b39c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZDA71928085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3918ca9678f00a2ac123e855c8681f106f0097db068fb59d2739723e97dfd8b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:34:02Z), 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/QZFYZ1944154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91d75996cda390639c4d678cad94b5ae9ce8ab5a7c8dc2b05de04d78c98258c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNC1991641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763982f2fb16d8818fa3d76ea76e8940b125343259a2ccede1592aaaa4457a6a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6L2115414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd8758dda0e113dd826494135263c0dc36232c445e060b262a60e75472dfd19. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNC2263302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee70a2435092f6bcf133d31d8be089252be664ca24f250897f970b2ef035ddf5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2288549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699bfb2c1ff1556cafef4259b42869dd2cfdf07839250c6d8846276e60333e7a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:18Z), 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/QZNWR2322016.
VUN SCHEFFLENG BIS OP ESCH AN REM ZERECK
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0edfddade2a748f3da98da02043966b1724bf1a0dbc9fd1ddb28c942bf6694. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTAZ2395610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66710de04bf6b0a23d0761ab3169543bf35e786169fffde3256a38af05fe758. 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/QZWFL2325679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6b7935e28cf517470bb2da91108e209b80d535ddcd9d4d34e5a9d5e88590f8. 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/QZPLR2483392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5c895fea95f5080881c7b37b6acabe242c00771ea4ec40aa19dfe1c09d8b64. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTBA2482112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a561e079c079604733c44ab0ab3bc6776ebaf3d342e4e88dfdfd51e540f36. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFX2408044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710bd85c6b3f1c24359223d16fa1ca046b711150c64597edcdace983ef5c738b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA42537968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fcc302cfaa84990f7e9d99edfeba70bcc6b04a597a345a2f9daef9848416d3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHNB2204714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036f520b8626b00ff59398932149aed2e4fd25a88444075c0a6abe416d4404cf. 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/QZK6G2536365.