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 0x6b2d207cb01cd2944452c695afc85495e85d73c08f7967cb38c882902e3d0182. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4ca382b-a71f-4761-bcf6-bb8fe6cdb318.json and https://artists.proofprofile.net/proofs/artist/b4ca382b-a71f-4761-bcf6-bb8fe6cdb318.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 0x65f9366e4955b6409c1e556f0971578365bc714e7da16fc90f9448e94613f6d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac04d9078295f6f0495dbea59d5430214f0611deee3ab57e65ed4cb465a47557. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA611800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c4aa1072616dded930367119ee87e1009a92661119563a69d48fbba1ce133. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7283ef8ae27dd562e97843de8b56cd0e8deb2e34968df3c88f0d1588d26eba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HUA611800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5856db9eae3d8d78529f4f0c33c8a03627d5c0dd4a96691370e4b9570f9a6626. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HUA611800152.
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 0xc63ef6fc7591598e8d146cfc6eb12fd59e41296d45a5427101810a04948d371a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HUA611800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca1751e8af8206121c936457ed8691541beb74f77ca0ec73b0ef3eee163a948. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA611800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c17e052f35450ff46377cd7c402066aebc7bc78d69faa84e254ff0c0436e1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HUA611800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c31cd8aff1ad171016202a91d67f6875cfabf5e4024e09f4af039ce7b92723. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HUA611800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6a434b848306c0d1fbf08740adda14920370519d8c2ff85c2f82a63a3077e. 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/HUA181522302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d461cede63019721babd9dcacc413aaa16325ed9a2a52545e5e9dc04ac4ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HUA181522304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb163a2fc903f3bbd322525534fcbf1d288272c49fcfa09e3c687e1be19ecffbf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HUA181522306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25da32d4205d33e72b4914332e2fb634b097bf669f93193dfd3cb9b6c08e223c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA181522307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c9f35c4445ca6d45cd4bae395c2b663e8a1ad1071d73051944071603c1b12. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA181522308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222bd0c23c276cb814c8699aa4c4c168f1f3cdd2daaf7801bf7de4ad2b393d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA181522309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ce70e0507f63c3e06cad4d945b6960748000b2de00a1416124466ba7322c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HUA181522310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0e747e85d37f0726e07ad0415aa62e51cbe818fbbbcbe4e01e3e84d9a1a81. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HUA181522301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a53391ce4dd96dd2be2323a55a58cb77e30ff736e30e6a8048ed166cb54c61. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HUA181522303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc2b101674e2b9500dc6d0c608bd810b191c5df0629e9390be5bb53680dfdb1. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/HUA181522305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e41c059326fa88575f2bb73966db740631243e3a06fab964da8993a933c81. 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/HUA611702267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff95f18767204124e50e45ae1d71bacd300eb6f005ccce68b235811fec9924. 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/HUA611702268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2d8f758cae263c1cc1531996579c366a723aa990c661697b4ca091de1bad3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA611702270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417ab81be24d9eb535e7f0113d6e3b70f940d251ab4df4a2029a201fc18547ce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA611702272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed162216441f48cbd183114d8af40bd652d9567a5c5e37d69cae6e1573469fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611702275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a251292b10b4abc33a19530dc3130a2e9bc96900377c5d0cb1db19d51c3c05. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA611702276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51f8e50a15651f4bfa98b4ec703fc43e4ab1aaf2cb0be1dcb80c920f5de4fb6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA611702277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd56b40f60a5aa1e10d577c37c6072ad99f4e6c6877d2a5866ae29666657106. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HUA611702271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6f24977487cc078e91c4c143015a1e86068b67cde28026fa4cc386a92dd9b2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HUA611702273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d85d0777112e1a57cf5f54f661da6e07c403140254f2473037276985403eac. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/HUA611702274.