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 0x53d9a8a2bdc81e919dcb2d5d21f838c880702457e3b8c291def06c9a5b985b70. 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/3375dea3-1814-432f-ad91-b339b6d8997c.json and https://artists.proofprofile.net/proofs/artist/3375dea3-1814-432f-ad91-b339b6d8997c.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 0xd993ab555ed6cf483790219810548b0e446af857e13b145e199265d33cc9726c. 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/QZPEW2495235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1eaebff3231de459dca4ea00527a14e392d45815192152e1c977ea11914a2. 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/QZPEW2465150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1771969013a858076c2d5b926c6d99891d6d817fa0473fafe058f8aeef317. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVEM2542720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421267ba49b8506ae27239b914ff9b51fe12cfba33dc783f5f099cf2951229c0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:04Z), 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/QZVEM2542721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fef65940b8a6a911bfcc2db5c0079da515084e951c6f150ce71f4078c8c5a78. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZVEM2542723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7edff846d2ff8347a7e1a50df7c3a0ecb7fe5b6bab5a042bf191a5f2201ad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZVEM2542725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b09e8f388b422aafe8c08f148f71a0d1eef34379ced79aa7aed09abbd6779. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZVEM2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0b17afd071c81e528716d1b6331c85cba538324beff0ea50c88b55e3743eb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:44Z), 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/QZVEM2542729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026a2cdc4e7014a6ab056a2ac48c0c8ba41eddd58c783faa8187a9136213838. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZVEM2542715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99c4913a4dda38231275e8a74482a1a3e051544f65865355126001272caf02. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMB622210053.