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 0xfbf49c284bdf38562af42f8f9376fb8e646c4d1f41e7fb902621812f048e8ec0. 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/ad6c8bf3-eea1-4747-87eb-768e75ca8c88.json and https://artists.proofprofile.net/proofs/artist/ad6c8bf3-eea1-4747-87eb-768e75ca8c88.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 0x9d2da0882e1020270f1ff5ec1e90bdcdbb73423fe6753018cbf86d1171a6f140. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:59:34Z), 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/USL4R1802874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6921ecb1ca2dbf657248e8480192316e73c37d7bb451adb2d136552e90762a91. 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/USL4R1802875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843887c5fcf7b5fd5cacb21d2e94d7dfc829ccff64205c26c04d8439385c449d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4R1802877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d83308620689f7f43416cf6d2901a5b6e15c119884fefb04e025df3e662c32e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:33:48Z), 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/USL4R1802878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1bfb5c6bc21dc9ea10d2c2bb86402ea79dbb10857d1f0da3d3596cda581ed7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:28:55Z), 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/USL4R1802882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5b0976cccae2b308951b8602ecbb2bc0a9fa797ec7ab8b957d74c59c4e31e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USL4R1802884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d044d1d98769bb264dcc4a82386c2dafd163ceea1966a94efbd5f0dcbd8c71. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:17:23Z), 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/USDY42040668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a5100dba333374b77370ce6406a9cf28c64d67310677e78c0f1459bf2c6fa. 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/USCGH2098469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6939b1301c1a628723d96940f19ca6fc936fa6fdae5833b03214b5ae8fd2569. 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/USDY42040672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a8a30f7bbc5ea78bf0c7730d5e2393827841188cc49fe7cdf14f70d146d9d7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USDY42200892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb60e59351542d9c97818eef62d11b8e68bb017c8faece183f47c5744db94008. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:52Z), 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/USDY42200893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68023afedba761a5965907a152d7ea2ee0ffe14224069cc27832e896ea410ccc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:59:39Z), 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/USL4Q2154278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7096ccf18753ab2acab0c50225595ea228b41cf69bb1c5662bac617f38b0800. 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/USDY42437547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99734d99d5088ff25d1bb30173a54494ac44608e2cf56fbb152900aa24ecf64. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:18Z), 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/USHM22508515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99734d99d5088ff25d1bb30173a54494ac44608e2cf56fbb152900aa24ecf64. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM22508515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949f8b0b75524f85ded6cc92008a9610098a569e0deebfb491a43db0e6733e22. 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/USHM22548289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfa07c5e1e93ecf7ad30e890d8ddbc3595fbc823cc928e8026a417a29cd4460. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM22548291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880ad7004ba64ed32c584030993e44c98ee4d0eff6dc2b146d2ef011846bbba0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:32Z), 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/USHM22548292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335ae04c6f2164d0ef78c5769f1884fb8b312f2c1df1aad4bc2b6ec00f38324. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY42349573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc939051c77938e2eb02b7881e7dcf000e11250bb0d52a1bda18329b894893. 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/USHM22548293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7096ccf18753ab2acab0c50225595ea228b41cf69bb1c5662bac617f38b0800. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:42Z), 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/USDY42437547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6d087d9116aed04dee6dbf76fd6bf5a70a6ce2e0ca0e679b8425715582bdeb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM22548295.