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 0xf14809eaa817b2af746feb1eb6634286a7e5cf552c6dc81eebb291628470fe03. 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/726bea60-3e55-4e2b-96d0-a9208e9bdc92.json and https://artists.proofprofile.net/proofs/artist/726bea60-3e55-4e2b-96d0-a9208e9bdc92.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 0xadf1775a22897de081650f055331936107535350adf2d0e8328a1d090eab293c. 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/QZRP42289561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ddccf225a29173e286828854a7b682b9de49ff5c45bf4cccadc8f0077a24f5. 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/QZRP42289562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc3069b8b0e5fd58b2829c9de744e0eac72ee2128681e5e5402f7c6fcfed054. 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/QZRP42289563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced3c5e601c979c83c6557bad02db7740e826bf80367150bc18604379944234. 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/QZFYY2371985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd3c4b25b70b05141810a28175b94f9bcaee6fea624d1637734c13d98bd215f. 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/QZK6N2140084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d2bb8cf705b2c0d26792212b683137dd5a4fab80be3791eca9569711530630. 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/QZK6N2140085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b44e2147ecccff91c76577be65b69b600d6b55cda66a15bc0da5d1202f3975. 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/QZHN32146041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116df7a652cfc4751d69cd08fcf7a9e40e0ba2b17a5746a5f823d04827d7347. 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/QZK6N2140087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42219d6409ed1bc523b5b72ce61d47f760f26d8b9df16001a1994d33d6f1ed6f. 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/QZDA72171819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59680e07bb6e4e910e1f5b3ea815fb54e960bda7fa697b689a3ed6cd5b2406f. 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/QZHN72192484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1040e6df4814ead897fb60bbbff6d924cb97be46ed93a86cea948d73958eaba. 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/QZK6N2140088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0329cec97001f2efaa99312e91e37399af0a9afc3ccd8013b42c9f593df209d6. 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/QZK6N2140089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eeaebf13a0dcbc4c30a97682967b8ed64e6c8fac509cd8e6e5cb47d12620b0. 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/QZK6N2140090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a600cb9078914cfa0f08afce8af73cf0a4f2e44aeb09a24efac2c24f0cc4337. 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/QZK6N2140091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf89a21ba64a884d91e0c04cc67159ae67bdb2fe8f0d7d73f1f12519111438da. 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/QZFZ32065288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3528108e80714e044f813b4cae91718d4b3b5191fc9df5e15f565f33045908. 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/QZK6N2140092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506019300cb48fb34e73d36eacc061333c6165e0bbb9a1f5091afc091517191c. 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/QZK6N2140093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377d1f37ea130a9dc3a47c3e21ece403100837d65c7f6a3d53d2956f1392ab43. 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/QZK6N2140094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d696877e93bf7eac2478edfbd0d2673057e8309fb743db746c00b1f5907919. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZRP42289564.
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