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 0xe0a6793c9825c099b6251ebd2c6d849ce6a30912c7ed0b6f89d8ec09efcdbc55. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/954d7c8f-7713-4299-b18c-a40157da16f7.json and https://artists.proofprofile.net/proofs/artist/954d7c8f-7713-4299-b18c-a40157da16f7.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 0xc9ba9818d752de59907c79741c6fec0e83fb6bd9e54136eb124acdb161935f6a. 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/QZK6N1998884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c187c5e18024ab6617a82669d7f6c1eb20263acca478ed67c8fb3f5265d11. 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/QZK6N1998243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe944d606001efe74a05984ff415cc2966e07fbdb5da0c82446474785a4fa463d. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZK6N1998881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246cece4185a9b780829c142af66cb9adfb0609c5919bca360a026e13d048e2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N1998244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc2de65359e9a3469f62b0c083ba213d7fefe2f019b287359bd2d907cf007c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N1998246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64751cd8e34ad04ca003de30abe5fdafdc71c1fdf556973e39f523d65a33cd65. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N1998242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9429f5533b8f1349b77f8ed081b8151339367d573364ce7f759e9dc314e598. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N1999580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32101e8d82795fbb96ac4d053bb0fa3c75420da24bf39683d0cf1cd7cb9019bf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6M1901244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64e35739ddbfd52c3246b47ce9bf36eaa103ed7ac7bae692b71d24f7767ad13. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6N1998885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa856dc18c8e5d8a2d79af33751a9cd14b545abd3a3c50e44b00414ab8ab6e707. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2171705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a615d7a1734691e38b8c578473e1a5a678b4d9f648fb400591cb83281c74fee. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:44:58Z), 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/QZNWT2171712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33400d5817c6f4a5320760a2ecd48f4cd1bb13ef06021232e80b8062c5f4b858. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWR2325143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94de78a8eac77ff99619d5f845b5d779806f03190dfd8cb0f94ff4aed7d6dc99. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:07Z), 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/QZTAT2453362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186484d337989c8e641d6f6a987d3d23c97c6be0686cf144713c1177c773bd10. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB22411150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c10c6a8551fea888975a3c1b3975a499b671154f86aabc6bf664c1c7a8f46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP52533722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0e737f47c109c95524623fb6c5f5632fce03652e80ace7224b937d407e653a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7L2532419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d12a9ec838f0ae89b6b29c0f60950762f22f921166e5d8531013c36efaf548. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7P2562888.