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 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 0x2c4cfcf5177cb45071c2c08804517d68e12b42e69ed983516539d87139bb7025. 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/c32f7fcf-a164-4c5b-93df-b623f3fb1eea.json and https://artists.proofprofile.net/proofs/artist/c32f7fcf-a164-4c5b-93df-b623f3fb1eea.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 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 0xea4b3ccd5efc99a3cdaba5d05ba13935999bf3b3d3e20a2b281e161299203095. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2170096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9243848528639c522854fa594f604f5332ec03c44e3fbb6e0252420c21f5fde. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNB2209491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45cb7a20e2b10e8831a3126d5a50152ef9e06f5f1ad4b9302964f61c1c838a2. 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/QZHNB2209492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaf87a5b4bb07ca77dc303a6180770d786cbbb8e162af96707b0a8f5a900569. 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/QZHNB2209496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be57e1a8164be52ce755e62e48e002a99a53770f91b803a43f484d53be9c393. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN62277792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad32c9e745656dd79ee68c5b1a6d8953a4163f1ec03c7c6a8c7b80063247ddc. 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/QZES52220929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e9ef992d3f52924b23931311d7f5cb303849c7b30c9c8df1eb64032cd97a21. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62275726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a3bd5c5aefe5b04abf124f71e0897ed1cea4d2aad751624788ad96881cff0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:33Z), 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/QZFZ72230638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f47d834d07270dfa60001efd9350a90afa93e34499a34656e9ac8b47dcb613. 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/QZHNB2209501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bca47c6cb3a1c44dd6a252df1e0f6fe963f6fe98be32a65b3ffbbd4aad648e6. 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/QZNWX2243252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169988c4cd49ffacae66aa3bfe5e2885a5dbd676eaa5c09cb86e32265724686. 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/QZNWX2243253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadcfecef16952d514865f7b4bec80c6f5a1493e0eb79a151b5635243ca14b7d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTB92282778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1f02161355dda0b52d8355b753772ab8392fd8693003b5556d74a0e2456b8d. 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/QZTB92282779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ec12855a61aa4c1e1da55c3bd39fe854f9b681de80f93a9c595385d5e74d09. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTB92282782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbbfed89990dd5d439114054bf595c81217ac9bf6a5489b151082f0c20b471e. 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/QZTAT2358681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84c70bd66950e8ca902438e362d67d34264f89ef8d9de694afac4a77cb79fb9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEM2310934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2403c5778109cab133ad9146a3fe4854b2b2bf3d99adbc7a0a9949b495756f9e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:00:39Z), 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/QZTAT2358688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8736742e86da331f640760cbd69074aea2fc7bcf4906eb52bfbe1e3b3bfdbe5c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:36Z), 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/QZHN82373884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d73dfe667971bcd9a126cfa6bd68c6d7333828646fb496c8d78cf391b69894. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS7J2443003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7fe7584a47651434c4c50aaf972e72209f457511a55aaaf4cb2e6090c0954. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZQAY2515795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6b2242bf4d0b2e1a6a1ce2e7036b13a965c9c9bbef0fbfe92373b88d2925a6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:52Z), 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/QZQAY2564416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dde7f328705283c54451d7f5ae6a19f9633931a49802f6b3d351182c80a055. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZQAY2587220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fdf371f53408a30d2040cbc81b6069d707e908ddc40a8f2105c20e6610fdfa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZQAY2515495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde75725e45d15658991167f35de826f52ea7ff70a91c56178badf7b9922f0416. 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/QZQAY2566955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dafcaa554186feea84dae18fa8891239eb979a61ed3a2424d18dda5c7866ae7. 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/QZQAY2594712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3bc575f160c727eceaf95b3b6b9527b48c1725f4ac8803a7735605c25ddb59. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZQAY2511701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb809d47e25e9ad716f6b5303d190e91482aa90109be3ac303099a7abb26e82. 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/QZSYP2568172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c68a1c6a33fd86e881b470251b6dff6b15fe73b1afdb0e6424b2440ff6b15. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:16Z), 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/QZQAY2513634.