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 0x86f3a269b9bda23bfb15ba83bbba581d4f85622bb6df29ad58b857ec52f57572. 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/f8ed0392-e840-4edc-8b41-08c37b031040.json and https://artists.proofprofile.net/proofs/artist/f8ed0392-e840-4edc-8b41-08c37b031040.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 0x0dd7accaca4e45a3fa3ba02d5ce683ae21d7e7e0d878e6e15eae87be282fe11e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA61973721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf894e420e693e494218f0871dd08b1fcc07141d183fe0323925c676f8a3fd084. 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/QZHN32076681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a955e88b3964541cb835d5a640edca2d47ed5645be943d5e0ed624fdd750a8f. 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/QZMEM2040083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b897ae8c8f44a0e85a1ac31a0e5c653830013747a3cb4d16c1fbc2463d8893. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEQ2191957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ccb1618c9146335b1eb092b2b6850e5923d7e60fd9907b91c88914fc15838. 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/QZMEQ2191958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8d399071950db6854acf1d5c913d3fdf7a3a18d021793574cc5a43aa0b0536. 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/QZMEQ2191962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c6d094ded27eef4ac485f0cc4fe070a8fb916a2f370c88803ebbbaa3ba3f7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2191964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcb06e73daf455154497f0ba788047242c8694169f6847f20ec435d515ec037. 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/QZRP42296936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8ad00d1106d46fe97ff071acdec20e23cf8a98d9809ab49dc08182927942e4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTBC2340352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185585f1b2f0c047cadd6bec5c41be21501217d6e836b17027b5fac8d96fbf1f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBC2340353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e939f7dee75da3de034ecc677022876b22f482de1655219a08fc2f168a4235a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZTBC2340354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4238bbd20975e7b4f52651f07d6e26f7290450d1f65f4a1d8cc7cb6032b7b7ba. 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/QZTBC2340355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f4c7199e64bbae710c37b8ee0c2f20c723f04485b6d06f43ec8d57c093a93f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTBC2340356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9fa827328f466dc85e21f695699a5e3095c8390232710784eb890c1bc42fb1. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA52428313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10564f558b797686a0fadddec7d0268ca6dadb98df7d62017386597e7f8dc4f. 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/QZTBD2488175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b5cc5f81056887a8d308bb1bd18e056123162f484f2fe945b051fe4a74ec15. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFK2481953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf695f8058a4f26aa766d59e5713b0c0ee5fb42ea7db1720588ad30a5583f850. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFK2481954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bed03cf1742ff3c1086e7be12f9a840fdc78e709935747c09c4d84a536bb8. 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/QZWFK2481955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21379e556ba72660adb4498296ca64aca4547221efa7e41fb6c29a7aa8ba04c. 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/QZWFK2481956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3416c5e6189dc8d01ae7238adeb709482e1e92f1463d36f0aaf5fe0eae460f2d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWT2555908.