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 0x359a58f4fbbdb37f69d4752fed5573cda1135db1b6af5b3f6e73e9d9f40c0823. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e31dc327-35d6-44bb-84a0-373dd8e71d4d.json and https://artists.proofprofile.net/proofs/artist/e31dc327-35d6-44bb-84a0-373dd8e71d4d.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 0xf08db848629e289cb037b3540983275b6d4012c4b126390b6c4ae21af04ea7c8. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHN32543799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d361360cb2c7cbc4f424588b9e8d3801a534b666d087c0dc123d04deeb41c. 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/QZHN32543800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95e91b64b5a7106b063f043aee102ba93cf1247d3cd5105e8213382f0603055. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN32543801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e388685c408570966eef0c5bd0b57a689b9ac52e7c44d5acebdd29c42038f77. 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/QZHN32543802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08db848629e289cb037b3540983275b6d4012c4b126390b6c4ae21af04ea7c8. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:21:55Z), 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/QZHN32543799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8250100387154e3a5b0c193ecd4c64d577910f72d6e48e4883b0ee6e8be2f7. 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/QZK6N2544311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316e618a4159e69edf419ba5aafbd7db03c6193e64da7798584c8924bb374834. 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/QZK6N2544312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c748c50ca9bd1d94f2e1d921d728d9b403512b9352eae44f6cb8358363ac7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:57Z), 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/QZK6N2544313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5098080bd9acebf737c082c15c6f73e452524b8d73e557d72da47719e8bd062. 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/QZK6N2544315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed38f60d964dc71c64c4210ea2e06f1c0f1eac29b6f83ef7ffee138490e103c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:29:21Z), 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/QZK6N2544316.