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 0x50b56e9df2f414c1b98db26208afcfafa15bd888b9de2ec551815a0f30007768. 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/181a4b39-35e2-481b-a771-f89d2843bc76.json and https://artists.proofprofile.net/proofs/artist/181a4b39-35e2-481b-a771-f89d2843bc76.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 0x00685a9fc3963086c90c9a336c3c42d88eaff479c73155492c45c7ad53f149da. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN92188956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadbe02e439de3fb3932e6b1e628c100eabf484214d6892698ffa3a35f230d0. 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/QZHNA2123574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0320dfe10404ba41ee3fd802ab94531b7a4da59a5ab322c261ecd229f0d71b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNA2123575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1d54724861957fe89b4d81b0cf77d5528db1b9a7f59c7918dd2d8989a2d0c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHNA2123577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533353007f28c7c8fe7bf4d5fb58ffe7d58f99f8f75f0e3ef09c8fe8ce25d1d1. 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/QZHNA2123578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74adc95d364095e2befb99f5501ba37c6038289acccd8d8120767c9cd8e864e. 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/QZHNA2123580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3078674338b15103b99b6babad57715aa8debaf3f9f981232a417f5948046a34. 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/QZHNA2123583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6951337f1c898915022f487685195058d7a66dc187b721faba9cbf86572c60. 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/QZTAS2129387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd09781d211b8ba11aa44f1dd62b93dd3e44dd33820d5d1278e721ef0573830. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/QZTB32278661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e7751c0484dc1570cd7bb223f6c9f68fe7232f0aabed8793456c24bfd25f96. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTAX2366996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a2d63f8f1bfcfefd72ff0a568fce5f99bc61ea2c7b7c70e6799e44d960cec9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAX2367000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9789b18a75c0b06e73afe394dbc1f278c5fa923e087cc724b72ef15417d8dcf3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:34Z), 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/QZK6F2481324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ba9eb785470c2e658cb961f29387d7a761ea2e0d0b5695b1f7109e0fccfb3f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6F2481325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf996cf587418435b37dd293c74d717e65056a5a49ef30ee90c57c8192abf61f. 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/QZK6F2481326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0689b0078b1db2db9fc096db6d74a219d981ba4cae930a3b967a958312cf2f. 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/QZK6F2481327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a03858ccbbf2a1dfede288535d707224f99c8b79dd1a04670396a3074156d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6F2481329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a535fc771f6ad4a64ed24883ec8e969f9382cd763e5132c9febd6f579ad11ce. 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/QZK6F2481330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d12502043855d20d07b3f08fd671d848c4821495ea74b3a4c280c22fd24d2. 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/QZTB22350426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c78c511fb99141fe063799dfa7dd259956ef35caee3be2bab3838c02d24bc63. 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/QZNWY2346042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfa0e71fb728e5676b5a2c5a844fe7e73e29aa52a3a82417383cf98086b450. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZANGW2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ee7a818371fff70cee6d32cba19b906b88d1ba830fe01002ec2aa595076bc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX5MY2333551.
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 0xdc9c1abcee7104a8262612bd415859bbbbe457c1062a6d442fb172c0effa3ece. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESA122476504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb4bf6c15b5dc2d46b967f8b5ab8b42c083c774786745b6922430788860f911. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESA122476506.